./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4d014703 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-02 13:34:43,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 13:34:43,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 13:34:43,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 13:34:43,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 13:34:43,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 13:34:43,202 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 13:34:43,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 13:34:43,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 13:34:43,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 13:34:43,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 13:34:43,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 13:34:43,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 13:34:43,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 13:34:43,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 13:34:43,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 13:34:43,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 13:34:43,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 13:34:43,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 13:34:43,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 13:34:43,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 13:34:43,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 13:34:43,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 13:34:43,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 13:34:43,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 13:34:43,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 13:34:43,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 13:34:43,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 13:34:43,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 13:34:43,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 13:34:43,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 13:34:43,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 13:34:43,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 13:34:43,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 13:34:43,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 13:34:43,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 13:34:43,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 13:34:43,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 13:34:43,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 13:34:43,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 13:34:43,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 13:34:43,240 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 13:34:43,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 13:34:43,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 13:34:43,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 13:34:43,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 13:34:43,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 13:34:43,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 13:34:43,267 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 13:34:43,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 13:34:43,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 13:34:43,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 13:34:43,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 13:34:43,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 13:34:43,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 13:34:43,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 13:34:43,268 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 13:34:43,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 13:34:43,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 13:34:43,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 13:34:43,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 13:34:43,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 13:34:43,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 13:34:43,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 13:34:43,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 13:34:43,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 13:34:43,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 13:34:43,270 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 13:34:43,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 13:34:43,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 13:34:43,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 13:34:43,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2021-11-02 13:34:43,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 13:34:43,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 13:34:43,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 13:34:43,477 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 13:34:43,478 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 13:34:43,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2021-11-02 13:34:43,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b480ce0bf/9529b3fb0fb94b7b84924f88d9e61cea/FLAG8fbb72ab7 [2021-11-02 13:34:44,139 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 13:34:44,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2021-11-02 13:34:44,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b480ce0bf/9529b3fb0fb94b7b84924f88d9e61cea/FLAG8fbb72ab7 [2021-11-02 13:34:44,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b480ce0bf/9529b3fb0fb94b7b84924f88d9e61cea [2021-11-02 13:34:44,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 13:34:44,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 13:34:44,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 13:34:44,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 13:34:44,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 13:34:44,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 01:34:44" (1/1) ... [2021-11-02 13:34:44,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f92b8a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:44, skipping insertion in model container [2021-11-02 13:34:44,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 01:34:44" (1/1) ... [2021-11-02 13:34:44,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 13:34:44,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 13:34:44,862 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_begin_harness.i[4495,4508] [2021-11-02 13:34:44,867 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_begin_harness.i[4555,4568] [2021-11-02 13:34:44,884 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-02 13:34:44,892 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-02 13:34:45,406 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,407 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,407 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,408 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,409 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,423 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,424 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,425 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,425 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,426 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,427 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,427 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,427 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,590 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-02 13:34:45,595 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-02 13:34:45,597 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-02 13:34:45,599 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-02 13:34:45,600 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-02 13:34:45,600 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-02 13:34:45,601 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-02 13:34:45,601 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-02 13:34:45,603 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-02 13:34:45,604 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-02 13:34:45,711 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-02 13:34:45,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 13:34:45,754 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 13:34:45,772 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_begin_harness.i[4495,4508] [2021-11-02 13:34:45,773 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_begin_harness.i[4555,4568] [2021-11-02 13:34:45,774 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-02 13:34:45,775 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-02 13:34:45,810 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,810 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,811 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,814 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,815 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,821 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,823 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,826 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,826 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,827 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,828 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,828 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,828 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:45,860 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-02 13:34:45,861 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-02 13:34:45,861 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-02 13:34:45,862 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-02 13:34:45,867 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-02 13:34:45,868 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-02 13:34:45,869 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-02 13:34:45,869 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-02 13:34:45,869 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-02 13:34:45,870 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-02 13:34:45,897 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-02 13:34:45,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 13:34:46,102 INFO L208 MainTranslator]: Completed translation [2021-11-02 13:34:46,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:46 WrapperNode [2021-11-02 13:34:46,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 13:34:46,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 13:34:46,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 13:34:46,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 13:34:46,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:46" (1/1) ... [2021-11-02 13:34:46,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:46" (1/1) ... [2021-11-02 13:34:46,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 13:34:46,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 13:34:46,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 13:34:46,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 13:34:46,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:46" (1/1) ... [2021-11-02 13:34:46,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:46" (1/1) ... [2021-11-02 13:34:46,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:46" (1/1) ... [2021-11-02 13:34:46,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:46" (1/1) ... [2021-11-02 13:34:46,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:46" (1/1) ... [2021-11-02 13:34:46,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:46" (1/1) ... [2021-11-02 13:34:46,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:46" (1/1) ... [2021-11-02 13:34:46,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 13:34:46,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 13:34:46,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 13:34:46,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 13:34:46,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:46" (1/1) ... [2021-11-02 13:34:46,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 13:34:46,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:34:46,373 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) [2021-11-02 13:34:46,412 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 [2021-11-02 13:34:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 13:34:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 13:34:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 13:34:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 13:34:46,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 13:34:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 13:34:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 13:34:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 13:34:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 13:34:46,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 13:34:46,886 INFO L299 CfgBuilder]: Removed 55 assume(true) statements. [2021-11-02 13:34:46,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 01:34:46 BoogieIcfgContainer [2021-11-02 13:34:46,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 13:34:46,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 13:34:46,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 13:34:46,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 13:34:46,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 01:34:44" (1/3) ... [2021-11-02 13:34:46,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f881f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 01:34:46, skipping insertion in model container [2021-11-02 13:34:46,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:46" (2/3) ... [2021-11-02 13:34:46,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f881f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 01:34:46, skipping insertion in model container [2021-11-02 13:34:46,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 01:34:46" (3/3) ... [2021-11-02 13:34:46,898 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2021-11-02 13:34:46,902 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 13:34:46,902 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-02 13:34:46,935 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 13:34:46,940 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 [2021-11-02 13:34:46,940 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-02 13:34:46,955 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) [2021-11-02 13:34:46,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 13:34:46,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:46,961 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] [2021-11-02 13:34:46,963 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)] === [2021-11-02 13:34:46,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash -122732205, now seen corresponding path program 1 times [2021-11-02 13:34:46,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:46,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34995333] [2021-11-02 13:34:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:46,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:47,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:47,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34995333] [2021-11-02 13:34:47,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34995333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:47,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:47,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 13:34:47,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969244788] [2021-11-02 13:34:47,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 13:34:47,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:47,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 13:34:47,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 13:34:47,264 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) [2021-11-02 13:34:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:47,474 INFO L93 Difference]: Finished difference Result 224 states and 335 transitions. [2021-11-02 13:34:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 13:34:47,477 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 [2021-11-02 13:34:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:47,482 INFO L225 Difference]: With dead ends: 224 [2021-11-02 13:34:47,498 INFO L226 Difference]: Without dead ends: 109 [2021-11-02 13:34:47,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 13:34:47,504 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 181.55ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:47,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 158 Unknown, 0 Unchecked, 0.93ms Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 181.55ms Time] [2021-11-02 13:34:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-02 13:34:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-02 13:34:47,547 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) [2021-11-02 13:34:47,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 153 transitions. [2021-11-02 13:34:47,559 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 153 transitions. Word has length 41 [2021-11-02 13:34:47,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:47,560 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 153 transitions. [2021-11-02 13:34:47,560 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) [2021-11-02 13:34:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 153 transitions. [2021-11-02 13:34:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 13:34:47,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:47,562 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] [2021-11-02 13:34:47,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 13:34:47,562 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)] === [2021-11-02 13:34:47,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:47,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1738897517, now seen corresponding path program 1 times [2021-11-02 13:34:47,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:47,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007860481] [2021-11-02 13:34:47,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:47,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:47,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:47,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007860481] [2021-11-02 13:34:47,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007860481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:47,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:47,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:34:47,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62594526] [2021-11-02 13:34:47,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:34:47,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:47,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:34:47,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:34:47,730 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) [2021-11-02 13:34:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:47,992 INFO L93 Difference]: Finished difference Result 208 states and 294 transitions. [2021-11-02 13:34:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 13:34:47,992 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 [2021-11-02 13:34:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:47,994 INFO L225 Difference]: With dead ends: 208 [2021-11-02 13:34:47,994 INFO L226 Difference]: Without dead ends: 109 [2021-11-02 13:34:47,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.31ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:47,995 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 140 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.65ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.09ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:47,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 0 Invalid, 305 Unknown, 0 Unchecked, 4.65ms Time], IncrementalHoareTripleChecker [7 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 215.09ms Time] [2021-11-02 13:34:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-02 13:34:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-02 13:34:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.4285714285714286) internal successors, (150), 108 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 150 transitions. [2021-11-02 13:34:48,004 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 150 transitions. Word has length 41 [2021-11-02 13:34:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:48,004 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 150 transitions. [2021-11-02 13:34:48,004 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) [2021-11-02 13:34:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 150 transitions. [2021-11-02 13:34:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 13:34:48,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:48,006 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] [2021-11-02 13:34:48,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 13:34:48,006 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)] === [2021-11-02 13:34:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:48,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1666510959, now seen corresponding path program 1 times [2021-11-02 13:34:48,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:48,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792037375] [2021-11-02 13:34:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:48,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:48,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:48,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792037375] [2021-11-02 13:34:48,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792037375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:48,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:48,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:34:48,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942041806] [2021-11-02 13:34:48,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:34:48,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:48,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:34:48,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:34:48,081 INFO L87 Difference]: Start difference. First operand 109 states and 150 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:48,322 INFO L93 Difference]: Finished difference Result 210 states and 280 transitions. [2021-11-02 13:34:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 13:34:48,322 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 [2021-11-02 13:34:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:48,327 INFO L225 Difference]: With dead ends: 210 [2021-11-02 13:34:48,327 INFO L226 Difference]: Without dead ends: 127 [2021-11-02 13:34:48,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.52ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:48,334 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.34ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 211.32ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:48,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 451 Unknown, 0 Unchecked, 3.34ms Time], IncrementalHoareTripleChecker [5 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 211.32ms Time] [2021-11-02 13:34:48,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-02 13:34:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2021-11-02 13:34:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.4095238095238096) internal successors, (148), 108 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2021-11-02 13:34:48,350 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 41 [2021-11-02 13:34:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:48,350 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2021-11-02 13:34:48,350 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) [2021-11-02 13:34:48,351 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2021-11-02 13:34:48,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 13:34:48,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:48,357 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] [2021-11-02 13:34:48,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 13:34:48,357 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)] === [2021-11-02 13:34:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:48,358 INFO L85 PathProgramCache]: Analyzing trace with hash -423042159, now seen corresponding path program 1 times [2021-11-02 13:34:48,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:48,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911222517] [2021-11-02 13:34:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:48,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:48,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:48,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911222517] [2021-11-02 13:34:48,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911222517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:48,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:48,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:34:48,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130060969] [2021-11-02 13:34:48,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 13:34:48,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 13:34:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:48,491 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:48,702 INFO L93 Difference]: Finished difference Result 217 states and 288 transitions. [2021-11-02 13:34:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:34:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-02 13:34:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:48,704 INFO L225 Difference]: With dead ends: 217 [2021-11-02 13:34:48,704 INFO L226 Difference]: Without dead ends: 135 [2021-11-02 13:34:48,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.09ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 13:34:48,707 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 362 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.81ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.99ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:48,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 0 Invalid, 279 Unknown, 0 Unchecked, 2.81ms Time], IncrementalHoareTripleChecker [14 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 170.99ms Time] [2021-11-02 13:34:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-02 13:34:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-11-02 13:34:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.380952380952381) internal successors, (145), 108 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 145 transitions. [2021-11-02 13:34:48,729 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 145 transitions. Word has length 45 [2021-11-02 13:34:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:48,731 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 145 transitions. [2021-11-02 13:34:48,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:48,732 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 145 transitions. [2021-11-02 13:34:48,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 13:34:48,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:48,733 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] [2021-11-02 13:34:48,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 13:34:48,733 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)] === [2021-11-02 13:34:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:48,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2072078671, now seen corresponding path program 1 times [2021-11-02 13:34:48,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:48,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733787616] [2021-11-02 13:34:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:48,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:48,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:48,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733787616] [2021-11-02 13:34:48,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733787616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:48,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:48,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:34:48,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308665664] [2021-11-02 13:34:48,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:34:48,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:48,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:34:48,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:34:48,822 INFO L87 Difference]: Start difference. First operand 109 states and 145 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:49,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:49,158 INFO L93 Difference]: Finished difference Result 296 states and 388 transitions. [2021-11-02 13:34:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 13:34:49,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 13:34:49,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:49,160 INFO L225 Difference]: With dead ends: 296 [2021-11-02 13:34:49,160 INFO L226 Difference]: Without dead ends: 213 [2021-11-02 13:34:49,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 40.15ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 13:34:49,165 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 670 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 221.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.72ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 273.90ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:49,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 0 Invalid, 467 Unknown, 0 Unchecked, 3.72ms Time], IncrementalHoareTripleChecker [35 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 273.90ms Time] [2021-11-02 13:34:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-02 13:34:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 112. [2021-11-02 13:34:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 108 states have (on average 1.3703703703703705) internal successors, (148), 111 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2021-11-02 13:34:49,183 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 49 [2021-11-02 13:34:49,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:49,185 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2021-11-02 13:34:49,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:49,186 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2021-11-02 13:34:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 13:34:49,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:49,188 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] [2021-11-02 13:34:49,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 13:34:49,189 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)] === [2021-11-02 13:34:49,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:49,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1006498608, now seen corresponding path program 1 times [2021-11-02 13:34:49,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:49,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53662425] [2021-11-02 13:34:49,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:49,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:49,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:49,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53662425] [2021-11-02 13:34:49,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53662425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:49,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:49,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:34:49,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207576213] [2021-11-02 13:34:49,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:34:49,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:49,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:34:49,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:34:49,295 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:49,616 INFO L93 Difference]: Finished difference Result 299 states and 388 transitions. [2021-11-02 13:34:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 13:34:49,616 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 [2021-11-02 13:34:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:49,617 INFO L225 Difference]: With dead ends: 299 [2021-11-02 13:34:49,617 INFO L226 Difference]: Without dead ends: 214 [2021-11-02 13:34:49,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 46.88ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 13:34:49,618 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 701 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 211.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.12ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 262.93ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:49,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 0 Invalid, 443 Unknown, 0 Unchecked, 3.12ms Time], IncrementalHoareTripleChecker [40 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 262.93ms Time] [2021-11-02 13:34:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-02 13:34:49,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 115. [2021-11-02 13:34:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 111 states have (on average 1.3603603603603605) internal successors, (151), 114 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 151 transitions. [2021-11-02 13:34:49,625 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 151 transitions. Word has length 51 [2021-11-02 13:34:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:49,625 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 151 transitions. [2021-11-02 13:34:49,625 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) [2021-11-02 13:34:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 151 transitions. [2021-11-02 13:34:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 13:34:49,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:49,626 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] [2021-11-02 13:34:49,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 13:34:49,626 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)] === [2021-11-02 13:34:49,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:49,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1179077135, now seen corresponding path program 1 times [2021-11-02 13:34:49,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:49,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664872070] [2021-11-02 13:34:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:49,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:49,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:49,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664872070] [2021-11-02 13:34:49,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664872070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:49,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:49,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:34:49,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043325495] [2021-11-02 13:34:49,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:34:49,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:49,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:34:49,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:34:49,695 INFO L87 Difference]: Start difference. First operand 115 states and 151 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:49,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:49,867 INFO L93 Difference]: Finished difference Result 226 states and 298 transitions. [2021-11-02 13:34:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:34:49,868 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 [2021-11-02 13:34:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:49,868 INFO L225 Difference]: With dead ends: 226 [2021-11-02 13:34:49,869 INFO L226 Difference]: Without dead ends: 131 [2021-11-02 13:34:49,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.02ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:49,870 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.37ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:49,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 464 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [13 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 157.37ms Time] [2021-11-02 13:34:49,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-02 13:34:49,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2021-11-02 13:34:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.3361344537815125) internal successors, (159), 122 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 159 transitions. [2021-11-02 13:34:49,874 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 159 transitions. Word has length 61 [2021-11-02 13:34:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:49,874 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 159 transitions. [2021-11-02 13:34:49,874 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) [2021-11-02 13:34:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 159 transitions. [2021-11-02 13:34:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 13:34:49,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:49,875 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] [2021-11-02 13:34:49,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 13:34:49,876 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)] === [2021-11-02 13:34:49,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash -192730163, now seen corresponding path program 1 times [2021-11-02 13:34:49,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:49,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909450420] [2021-11-02 13:34:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:49,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:49,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:49,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909450420] [2021-11-02 13:34:49,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909450420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:49,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:49,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 13:34:49,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117782685] [2021-11-02 13:34:49,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 13:34:49,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:49,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 13:34:49,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:34:49,962 INFO L87 Difference]: Start difference. First operand 123 states and 159 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:50,334 INFO L93 Difference]: Finished difference Result 324 states and 415 transitions. [2021-11-02 13:34:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 13:34:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 13:34:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:50,336 INFO L225 Difference]: With dead ends: 324 [2021-11-02 13:34:50,336 INFO L226 Difference]: Without dead ends: 221 [2021-11-02 13:34:50,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 45.48ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-02 13:34:50,337 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 624 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 258.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.29ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 316.76ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:50,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 0 Invalid, 632 Unknown, 0 Unchecked, 3.29ms Time], IncrementalHoareTripleChecker [49 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 316.76ms Time] [2021-11-02 13:34:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-02 13:34:50,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 126. [2021-11-02 13:34:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.3278688524590163) internal successors, (162), 125 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 162 transitions. [2021-11-02 13:34:50,341 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 162 transitions. Word has length 61 [2021-11-02 13:34:50,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:50,341 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 162 transitions. [2021-11-02 13:34:50,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:50,341 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 162 transitions. [2021-11-02 13:34:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 13:34:50,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:50,342 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] [2021-11-02 13:34:50,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 13:34:50,342 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)] === [2021-11-02 13:34:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:50,342 INFO L85 PathProgramCache]: Analyzing trace with hash 930930641, now seen corresponding path program 1 times [2021-11-02 13:34:50,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:50,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340633540] [2021-11-02 13:34:50,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:50,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:50,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:50,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340633540] [2021-11-02 13:34:50,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340633540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:50,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:50,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:34:50,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917126194] [2021-11-02 13:34:50,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 13:34:50,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:50,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 13:34:50,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:50,413 INFO L87 Difference]: Start difference. First operand 126 states and 162 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:50,708 INFO L93 Difference]: Finished difference Result 269 states and 334 transitions. [2021-11-02 13:34:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:34:50,709 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 [2021-11-02 13:34:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:50,709 INFO L225 Difference]: With dead ends: 269 [2021-11-02 13:34:50,710 INFO L226 Difference]: Without dead ends: 172 [2021-11-02 13:34:50,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.04ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:34:50,710 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 208.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.77ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 265.13ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:50,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 655 Unknown, 0 Unchecked, 1.77ms Time], IncrementalHoareTripleChecker [11 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 265.13ms Time] [2021-11-02 13:34:50,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-02 13:34:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2021-11-02 13:34:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.3114754098360655) internal successors, (160), 125 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2021-11-02 13:34:50,714 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 61 [2021-11-02 13:34:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:50,714 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2021-11-02 13:34:50,715 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) [2021-11-02 13:34:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2021-11-02 13:34:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 13:34:50,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:50,715 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] [2021-11-02 13:34:50,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 13:34:50,715 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)] === [2021-11-02 13:34:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash -961072015, now seen corresponding path program 1 times [2021-11-02 13:34:50,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:50,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228515761] [2021-11-02 13:34:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:50,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:34:50,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:50,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228515761] [2021-11-02 13:34:50,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228515761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:34:50,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408450519] [2021-11-02 13:34:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:50,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:34:50,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:34:50,827 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) [2021-11-02 13:34:50,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 13:34:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:50,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 13:34:50,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:34:51,175 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 13:34:51,175 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 [2021-11-02 13:34:51,205 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-02 13:34:51,205 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 [2021-11-02 13:34:53,060 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-02 13:34:53,060 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 [2021-11-02 13:34:53,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:34:53,077 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 [2021-11-02 13:34:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:34:53,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:34:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:34:53,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408450519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:34:53,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:34:53,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2021-11-02 13:34:53,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3068088] [2021-11-02 13:34:53,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 13:34:53,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:53,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 13:34:53,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-02 13:34:53,358 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:53,726 INFO L93 Difference]: Finished difference Result 280 states and 353 transitions. [2021-11-02 13:34:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 13:34:53,728 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 [2021-11-02 13:34:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:53,730 INFO L225 Difference]: With dead ends: 280 [2021-11-02 13:34:53,730 INFO L226 Difference]: Without dead ends: 185 [2021-11-02 13:34:53,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1252.85ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-02 13:34:53,731 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 271.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.66ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 701 IncrementalHoareTripleChecker+Unchecked, 332.71ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:53,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 1468 Unknown, 0 Unchecked, 2.66ms Time], IncrementalHoareTripleChecker [7 Valid, 760 Invalid, 0 Unknown, 701 Unchecked, 332.71ms Time] [2021-11-02 13:34:53,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-02 13:34:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2021-11-02 13:34:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.2971014492753623) internal successors, (179), 141 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2021-11-02 13:34:53,735 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 65 [2021-11-02 13:34:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:53,736 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2021-11-02 13:34:53,736 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) [2021-11-02 13:34:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2021-11-02 13:34:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 13:34:53,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:53,736 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] [2021-11-02 13:34:53,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 13:34:53,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 13:34:53,948 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)] === [2021-11-02 13:34:53,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:53,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1284507439, now seen corresponding path program 1 times [2021-11-02 13:34:53,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:53,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026649915] [2021-11-02 13:34:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:53,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:34:54,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:54,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026649915] [2021-11-02 13:34:54,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026649915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:34:54,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245687312] [2021-11-02 13:34:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:54,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:34:54,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:34:54,038 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) [2021-11-02 13:34:54,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 13:34:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:54,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 13:34:54,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:34:54,216 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 13:34:54,217 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 [2021-11-02 13:34:54,233 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-02 13:34:54,233 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 [2021-11-02 13:34:56,097 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-02 13:34:56,098 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 [2021-11-02 13:34:56,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:34:56,123 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 [2021-11-02 13:34:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:34:56,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:34:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:34:56,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245687312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:34:56,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:34:56,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2021-11-02 13:34:56,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130842035] [2021-11-02 13:34:56,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 13:34:56,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:56,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 13:34:56,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-02 13:34:56,367 INFO L87 Difference]: Start difference. First operand 142 states and 179 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) [2021-11-02 13:34:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:57,381 INFO L93 Difference]: Finished difference Result 543 states and 680 transitions. [2021-11-02 13:34:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 13:34:57,381 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 [2021-11-02 13:34:57,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:57,383 INFO L225 Difference]: With dead ends: 543 [2021-11-02 13:34:57,383 INFO L226 Difference]: Without dead ends: 447 [2021-11-02 13:34:57,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1597.92ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 13:34:57,384 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 623 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 559.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.37ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2005 IncrementalHoareTripleChecker+Unchecked, 673.81ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:57,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 0 Invalid, 3316 Unknown, 0 Unchecked, 8.37ms Time], IncrementalHoareTripleChecker [45 Valid, 1266 Invalid, 0 Unknown, 2005 Unchecked, 673.81ms Time] [2021-11-02 13:34:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-11-02 13:34:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 173. [2021-11-02 13:34:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.3076923076923077) internal successors, (221), 172 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 221 transitions. [2021-11-02 13:34:57,392 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 221 transitions. Word has length 65 [2021-11-02 13:34:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:57,393 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 221 transitions. [2021-11-02 13:34:57,393 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) [2021-11-02 13:34:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 221 transitions. [2021-11-02 13:34:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 13:34:57,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:57,394 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] [2021-11-02 13:34:57,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 13:34:57,615 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,SelfDestructingSolverStorable10 [2021-11-02 13:34:57,615 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)] === [2021-11-02 13:34:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1580068785, now seen corresponding path program 1 times [2021-11-02 13:34:57,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:57,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889162990] [2021-11-02 13:34:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:57,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:34:57,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:57,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889162990] [2021-11-02 13:34:57,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889162990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:57,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:57,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 13:34:57,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148494100] [2021-11-02 13:34:57,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 13:34:57,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:57,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 13:34:57,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 13:34:57,649 INFO L87 Difference]: Start difference. First operand 173 states and 221 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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) [2021-11-02 13:34:57,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:57,794 INFO L93 Difference]: Finished difference Result 320 states and 412 transitions. [2021-11-02 13:34:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 13:34:57,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 [2021-11-02 13:34:57,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:57,795 INFO L225 Difference]: With dead ends: 320 [2021-11-02 13:34:57,795 INFO L226 Difference]: Without dead ends: 176 [2021-11-02 13:34:57,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.11ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 13:34:57,796 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.52ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.54ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:57,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 290 Unknown, 0 Unchecked, 0.52ms Time], IncrementalHoareTripleChecker [6 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 134.54ms Time] [2021-11-02 13:34:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-02 13:34:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-11-02 13:34:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.280701754385965) internal successors, (219), 174 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 219 transitions. [2021-11-02 13:34:57,804 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 219 transitions. Word has length 65 [2021-11-02 13:34:57,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:57,804 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 219 transitions. [2021-11-02 13:34:57,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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) [2021-11-02 13:34:57,804 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 219 transitions. [2021-11-02 13:34:57,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 13:34:57,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:57,805 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] [2021-11-02 13:34:57,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 13:34:57,805 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)] === [2021-11-02 13:34:57,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash -242411727, now seen corresponding path program 1 times [2021-11-02 13:34:57,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:57,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45210969] [2021-11-02 13:34:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:57,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:34:57,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:57,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45210969] [2021-11-02 13:34:57,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45210969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:57,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:57,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:34:57,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574677620] [2021-11-02 13:34:57,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:34:57,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:57,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:34:57,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:34:57,839 INFO L87 Difference]: Start difference. First operand 175 states and 219 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) [2021-11-02 13:34:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:58,032 INFO L93 Difference]: Finished difference Result 333 states and 419 transitions. [2021-11-02 13:34:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:34:58,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 13:34:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:58,033 INFO L225 Difference]: With dead ends: 333 [2021-11-02 13:34:58,034 INFO L226 Difference]: Without dead ends: 183 [2021-11-02 13:34:58,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.59ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:58,035 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.84ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.03ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:58,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 443 Unknown, 0 Unchecked, 0.84ms Time], IncrementalHoareTripleChecker [11 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 178.03ms Time] [2021-11-02 13:34:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-02 13:34:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2021-11-02 13:34:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 175 states have (on average 1.2514285714285713) internal successors, (219), 178 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2021-11-02 13:34:58,045 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 65 [2021-11-02 13:34:58,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:58,045 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2021-11-02 13:34:58,045 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) [2021-11-02 13:34:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2021-11-02 13:34:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 13:34:58,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:58,046 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] [2021-11-02 13:34:58,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 13:34:58,046 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)] === [2021-11-02 13:34:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:58,046 INFO L85 PathProgramCache]: Analyzing trace with hash 700473009, now seen corresponding path program 1 times [2021-11-02 13:34:58,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:58,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011899146] [2021-11-02 13:34:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:58,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:34:58,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:58,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011899146] [2021-11-02 13:34:58,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011899146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:58,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:58,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:34:58,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314578400] [2021-11-02 13:34:58,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:34:58,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:58,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:34:58,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:34:58,092 INFO L87 Difference]: Start difference. First operand 179 states and 219 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) [2021-11-02 13:34:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:58,297 INFO L93 Difference]: Finished difference Result 321 states and 396 transitions. [2021-11-02 13:34:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:34:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 13:34:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:58,298 INFO L225 Difference]: With dead ends: 321 [2021-11-02 13:34:58,298 INFO L226 Difference]: Without dead ends: 167 [2021-11-02 13:34:58,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.92ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:58,299 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.47ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:58,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 452 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [11 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 187.47ms Time] [2021-11-02 13:34:58,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-02 13:34:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 159. [2021-11-02 13:34:58,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.2451612903225806) internal successors, (193), 158 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 193 transitions. [2021-11-02 13:34:58,304 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 193 transitions. Word has length 65 [2021-11-02 13:34:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:58,304 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 193 transitions. [2021-11-02 13:34:58,305 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) [2021-11-02 13:34:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 193 transitions. [2021-11-02 13:34:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 13:34:58,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:58,305 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] [2021-11-02 13:34:58,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 13:34:58,305 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)] === [2021-11-02 13:34:58,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:58,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1164925684, now seen corresponding path program 1 times [2021-11-02 13:34:58,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:58,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101843237] [2021-11-02 13:34:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:58,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:34:58,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:58,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101843237] [2021-11-02 13:34:58,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101843237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:34:58,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760191712] [2021-11-02 13:34:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:58,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:34:58,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:34:58,788 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) [2021-11-02 13:34:58,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 13:34:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:58,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-02 13:34:58,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:34:58,964 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:34:58,965 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 [2021-11-02 13:34:58,975 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-02 13:34:58,975 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 [2021-11-02 13:35:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:35:02,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:35:02,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760191712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:02,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 13:35:02,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 22 [2021-11-02 13:35:02,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340091990] [2021-11-02 13:35:02,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 13:35:02,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:02,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 13:35:02,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=410, Unknown=1, NotChecked=0, Total=462 [2021-11-02 13:35:02,543 INFO L87 Difference]: Start difference. First operand 159 states and 193 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) [2021-11-02 13:35:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:02,662 INFO L93 Difference]: Finished difference Result 262 states and 318 transitions. [2021-11-02 13:35:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 13:35:02,663 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 [2021-11-02 13:35:02,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:02,663 INFO L225 Difference]: With dead ends: 262 [2021-11-02 13:35:02,664 INFO L226 Difference]: Without dead ends: 215 [2021-11-02 13:35:02,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1973.64ms TimeCoverageRelationStatistics Valid=55, Invalid=450, Unknown=1, NotChecked=0, Total=506 [2021-11-02 13:35:02,665 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 90.94ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:02,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 507 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 293 Unchecked, 90.94ms Time] [2021-11-02 13:35:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-02 13:35:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-11-02 13:35:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 211 states have (on average 1.2417061611374407) internal successors, (262), 214 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:35:02,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 262 transitions. [2021-11-02 13:35:02,672 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 262 transitions. Word has length 67 [2021-11-02 13:35:02,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:02,672 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 262 transitions. [2021-11-02 13:35:02,672 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) [2021-11-02 13:35:02,673 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 262 transitions. [2021-11-02 13:35:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 13:35:02,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:02,673 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] [2021-11-02 13:35:02,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 13:35:02,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:02,892 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)] === [2021-11-02 13:35:02,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1166772726, now seen corresponding path program 1 times [2021-11-02 13:35:02,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:02,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845706172] [2021-11-02 13:35:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:02,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:35:03,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:03,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845706172] [2021-11-02 13:35:03,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845706172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:03,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:35:03,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 13:35:03,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229169345] [2021-11-02 13:35:03,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 13:35:03,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 13:35:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 13:35:03,040 INFO L87 Difference]: Start difference. First operand 215 states and 262 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:35:03,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:03,407 INFO L93 Difference]: Finished difference Result 263 states and 318 transitions. [2021-11-02 13:35:03,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 13:35:03,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 13:35:03,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:03,408 INFO L225 Difference]: With dead ends: 263 [2021-11-02 13:35:03,409 INFO L226 Difference]: Without dead ends: 215 [2021-11-02 13:35:03,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 141.78ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-02 13:35:03,409 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 540 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 182.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.61ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 240.25ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:03,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 0 Invalid, 520 Unknown, 0 Unchecked, 2.61ms Time], IncrementalHoareTripleChecker [61 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 240.25ms Time] [2021-11-02 13:35:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-02 13:35:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-11-02 13:35:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 211 states have (on average 1.2274881516587677) internal successors, (259), 214 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:35:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 259 transitions. [2021-11-02 13:35:03,418 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 259 transitions. Word has length 67 [2021-11-02 13:35:03,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:03,419 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 259 transitions. [2021-11-02 13:35:03,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:35:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 259 transitions. [2021-11-02 13:35:03,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 13:35:03,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:03,420 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] [2021-11-02 13:35:03,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 13:35:03,421 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)] === [2021-11-02 13:35:03,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:03,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1353187208, now seen corresponding path program 1 times [2021-11-02 13:35:03,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:03,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491418307] [2021-11-02 13:35:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:03,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:35:03,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:03,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491418307] [2021-11-02 13:35:03,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491418307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:03,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:35:03,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-02 13:35:03,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547439570] [2021-11-02 13:35:03,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 13:35:03,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 13:35:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-02 13:35:03,639 INFO L87 Difference]: Start difference. First operand 215 states and 259 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) [2021-11-02 13:35:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:04,173 INFO L93 Difference]: Finished difference Result 265 states and 316 transitions. [2021-11-02 13:35:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 13:35:04,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 13:35:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:04,174 INFO L225 Difference]: With dead ends: 265 [2021-11-02 13:35:04,174 INFO L226 Difference]: Without dead ends: 215 [2021-11-02 13:35:04,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 290.51ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-11-02 13:35:04,175 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 386 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 240.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.48ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 290.25ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:04,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 0 Invalid, 679 Unknown, 0 Unchecked, 2.48ms Time], IncrementalHoareTripleChecker [42 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 290.25ms Time] [2021-11-02 13:35:04,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-02 13:35:04,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-11-02 13:35:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 211 states have (on average 1.2132701421800949) internal successors, (256), 214 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:35:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 256 transitions. [2021-11-02 13:35:04,185 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 256 transitions. Word has length 67 [2021-11-02 13:35:04,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:04,185 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 256 transitions. [2021-11-02 13:35:04,185 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) [2021-11-02 13:35:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 256 transitions. [2021-11-02 13:35:04,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 13:35:04,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:04,186 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] [2021-11-02 13:35:04,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 13:35:04,186 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)] === [2021-11-02 13:35:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:04,187 INFO L85 PathProgramCache]: Analyzing trace with hash -673128838, now seen corresponding path program 1 times [2021-11-02 13:35:04,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:04,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981335186] [2021-11-02 13:35:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:04,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:35:04,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:04,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981335186] [2021-11-02 13:35:04,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981335186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:35:04,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222730630] [2021-11-02 13:35:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:04,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:04,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:35:04,329 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) [2021-11-02 13:35:04,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 13:35:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:04,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-02 13:35:04,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:35:04,491 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:35:04,491 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 [2021-11-02 13:35:24,566 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-02 13:35:36,646 WARN L210 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-02 13:35:48,801 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-02 13:35:58,910 WARN L210 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-02 13:36:09,114 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-02 13:36:15,915 WARN L210 SmtUtils]: Spent 6.74s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-02 13:36:25,910 WARN L210 SmtUtils]: Spent 9.91s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-02 13:36:36,085 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:36:44,351 WARN L210 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:36:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:36:44,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:36:44,620 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 177 treesize of output 169 [2021-11-02 13:36:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:36:44,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222730630] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:36:44,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:36:44,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2021-11-02 13:36:44,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855565081] [2021-11-02 13:36:44,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 13:36:44,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:36:44,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 13:36:44,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=685, Unknown=7, NotChecked=0, Total=812 [2021-11-02 13:36:44,691 INFO L87 Difference]: Start difference. First operand 215 states and 256 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) [2021-11-02 13:36:54,746 WARN L210 SmtUtils]: Spent 10.00s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:37:14,168 WARN L210 SmtUtils]: Spent 19.41s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-11-02 13:37:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:14,731 INFO L93 Difference]: Finished difference Result 409 states and 474 transitions. [2021-11-02 13:37:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 13:37:14,732 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 [2021-11-02 13:37:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:14,749 INFO L225 Difference]: With dead ends: 409 [2021-11-02 13:37:14,750 INFO L226 Difference]: Without dead ends: 357 [2021-11-02 13:37:14,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 128756.81ms TimeCoverageRelationStatistics Valid=154, Invalid=895, Unknown=7, NotChecked=0, Total=1056 [2021-11-02 13:37:14,751 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 153 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 450.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.86ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 553.35ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:14,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 0 Invalid, 1760 Unknown, 0 Unchecked, 2.86ms Time], IncrementalHoareTripleChecker [5 Valid, 1377 Invalid, 0 Unknown, 378 Unchecked, 553.35ms Time] [2021-11-02 13:37:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-02 13:37:14,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 255. [2021-11-02 13:37:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 251 states have (on average 1.207171314741036) internal successors, (303), 254 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 303 transitions. [2021-11-02 13:37:14,763 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 303 transitions. Word has length 67 [2021-11-02 13:37:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:14,763 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 303 transitions. [2021-11-02 13:37:14,763 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) [2021-11-02 13:37:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 303 transitions. [2021-11-02 13:37:14,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 13:37:14,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:14,764 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] [2021-11-02 13:37:14,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 13:37:14,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 13:37:14,978 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)] === [2021-11-02 13:37:14,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:14,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1865990262, now seen corresponding path program 1 times [2021-11-02 13:37:14,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:14,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426013367] [2021-11-02 13:37:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:14,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:37:15,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:15,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426013367] [2021-11-02 13:37:15,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426013367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:15,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:15,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:37:15,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342645186] [2021-11-02 13:37:15,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:37:15,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:15,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:37:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:37:15,054 INFO L87 Difference]: Start difference. First operand 255 states and 303 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) [2021-11-02 13:37:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:15,180 INFO L93 Difference]: Finished difference Result 338 states and 404 transitions. [2021-11-02 13:37:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:37:15,180 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 [2021-11-02 13:37:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:15,181 INFO L225 Difference]: With dead ends: 338 [2021-11-02 13:37:15,181 INFO L226 Difference]: Without dead ends: 262 [2021-11-02 13:37:15,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.69ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:37:15,182 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.38ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.75ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:15,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 418 Unknown, 0 Unchecked, 0.38ms Time], IncrementalHoareTripleChecker [2 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 112.75ms Time] [2021-11-02 13:37:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-02 13:37:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 257. [2021-11-02 13:37:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 253 states have (on average 1.2055335968379446) internal successors, (305), 256 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 305 transitions. [2021-11-02 13:37:15,194 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 305 transitions. Word has length 67 [2021-11-02 13:37:15,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:15,194 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 305 transitions. [2021-11-02 13:37:15,194 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) [2021-11-02 13:37:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 305 transitions. [2021-11-02 13:37:15,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 13:37:15,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:15,195 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] [2021-11-02 13:37:15,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 13:37:15,195 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)] === [2021-11-02 13:37:15,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:15,195 INFO L85 PathProgramCache]: Analyzing trace with hash 27935740, now seen corresponding path program 1 times [2021-11-02 13:37:15,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:15,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163155085] [2021-11-02 13:37:15,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:15,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:37:15,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:15,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163155085] [2021-11-02 13:37:15,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163155085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:15,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:15,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:37:15,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323095587] [2021-11-02 13:37:15,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 13:37:15,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:15,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 13:37:15,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:37:15,251 INFO L87 Difference]: Start difference. First operand 257 states and 305 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:15,425 INFO L93 Difference]: Finished difference Result 309 states and 363 transitions. [2021-11-02 13:37:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:37:15,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 13:37:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:15,426 INFO L225 Difference]: With dead ends: 309 [2021-11-02 13:37:15,426 INFO L226 Difference]: Without dead ends: 255 [2021-11-02 13:37:15,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.89ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 13:37:15,427 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 179 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.73ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.94ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:15,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 0 Invalid, 312 Unknown, 0 Unchecked, 0.73ms Time], IncrementalHoareTripleChecker [8 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 146.94ms Time] [2021-11-02 13:37:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-02 13:37:15,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2021-11-02 13:37:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 251 states have (on average 1.1952191235059761) internal successors, (300), 254 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 300 transitions. [2021-11-02 13:37:15,437 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 300 transitions. Word has length 67 [2021-11-02 13:37:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:15,437 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 300 transitions. [2021-11-02 13:37:15,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 300 transitions. [2021-11-02 13:37:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 13:37:15,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:15,438 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] [2021-11-02 13:37:15,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 13:37:15,439 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)] === [2021-11-02 13:37:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:15,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1383780402, now seen corresponding path program 1 times [2021-11-02 13:37:15,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:15,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831988334] [2021-11-02 13:37:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:15,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:37:15,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:15,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831988334] [2021-11-02 13:37:15,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831988334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:37:15,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617817312] [2021-11-02 13:37:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:15,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:37:15,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:37:15,568 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) [2021-11-02 13:37:15,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 13:37:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:15,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-02 13:37:15,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:37:15,751 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:37:15,751 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 [2021-11-02 13:37:27,595 WARN L210 SmtUtils]: Spent 9.82s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-02 13:37:37,670 WARN L210 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-02 13:37:45,818 WARN L210 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-02 13:37:55,950 WARN L210 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-02 13:38:06,131 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-02 13:38:16,240 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-02 13:38:22,842 WARN L210 SmtUtils]: Spent 6.52s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:38:32,974 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:38:41,055 WARN L210 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:38:49,042 WARN L210 SmtUtils]: Spent 7.90s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:38:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:38:49,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:38:49,529 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 177 treesize of output 169 [2021-11-02 13:38:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:38:49,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617817312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:38:49,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:38:49,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2021-11-02 13:38:49,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317090263] [2021-11-02 13:38:49,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 13:38:49,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:38:49,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 13:38:49,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1149, Unknown=1, NotChecked=0, Total=1260 [2021-11-02 13:38:49,596 INFO L87 Difference]: Start difference. First operand 255 states and 300 transitions. Second operand has 36 states, 36 states have (on average 4.25) internal successors, (153), 36 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) [2021-11-02 13:39:03,420 WARN L210 SmtUtils]: Spent 9.68s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-02 13:39:12,755 WARN L210 SmtUtils]: Spent 9.31s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-02 13:39:22,801 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-02 13:39:42,678 WARN L210 SmtUtils]: Spent 19.86s on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-11-02 13:39:52,723 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 34 [2021-11-02 13:40:02,780 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 29 [2021-11-02 13:40:12,834 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 [2021-11-02 13:40:22,884 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 [2021-11-02 13:40:32,623 WARN L210 SmtUtils]: Spent 9.72s on a formula simplification that was a NOOP. DAG size: 28 [2021-11-02 13:40:42,669 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 [2021-11-02 13:40:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:40:43,807 INFO L93 Difference]: Finished difference Result 467 states and 544 transitions. [2021-11-02 13:40:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 13:40:43,808 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.25) internal successors, (153), 36 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) Word has length 67 [2021-11-02 13:40:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:40:43,809 INFO L225 Difference]: With dead ends: 467 [2021-11-02 13:40:43,809 INFO L226 Difference]: Without dead ends: 364 [2021-11-02 13:40:43,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 206304.90ms TimeCoverageRelationStatistics Valid=296, Invalid=2671, Unknown=3, NotChecked=0, Total=2970 [2021-11-02 13:40:43,810 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 455 mSDsluCounter, 2116 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 857.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.69ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 1046.41ms IncrementalHoareTripleChecker+Time [2021-11-02 13:40:43,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 0 Invalid, 3405 Unknown, 0 Unchecked, 7.69ms Time], IncrementalHoareTripleChecker [38 Valid, 3004 Invalid, 0 Unknown, 363 Unchecked, 1046.41ms Time] [2021-11-02 13:40:43,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-02 13:40:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 279. [2021-11-02 13:40:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 275 states have (on average 1.1927272727272726) internal successors, (328), 278 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:43,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 328 transitions. [2021-11-02 13:40:43,821 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 328 transitions. Word has length 67 [2021-11-02 13:40:43,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:40:43,821 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 328 transitions. [2021-11-02 13:40:43,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.25) internal successors, (153), 36 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) [2021-11-02 13:40:43,822 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 328 transitions. [2021-11-02 13:40:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 13:40:43,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:40:43,822 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] [2021-11-02 13:40:43,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 13:40:44,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:40:44,044 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)] === [2021-11-02 13:40:44,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:40:44,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1201768910, now seen corresponding path program 1 times [2021-11-02 13:40:44,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:40:44,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090501217] [2021-11-02 13:40:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:40:44,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:40:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:40:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:40:44,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:40:44,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090501217] [2021-11-02 13:40:44,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090501217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:40:44,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212756963] [2021-11-02 13:40:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:40:44,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:40:44,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:40:44,159 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) [2021-11-02 13:40:44,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 13:40:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:40:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 13:40:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:40:44,305 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:40:44,305 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 [2021-11-02 13:40:54,616 WARN L210 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-02 13:41:04,006 WARN L210 SmtUtils]: Spent 9.37s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-02 13:41:14,103 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-02 13:41:26,158 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:41:38,228 WARN L210 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-02 13:41:50,297 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-02 13:42:02,371 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-02 13:42:04,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-02 13:42:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:42:08,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:42:08,843 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 177 treesize of output 169 [2021-11-02 13:42:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:42:08,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212756963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:42:08,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:42:08,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2021-11-02 13:42:08,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700551155] [2021-11-02 13:42:08,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 13:42:08,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:42:08,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 13:42:08,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=754, Unknown=8, NotChecked=0, Total=870 [2021-11-02 13:42:08,913 INFO L87 Difference]: Start difference. First operand 279 states and 328 transitions. Second operand has 30 states, 30 states have (on average 3.933333333333333) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:42:23,027 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-02 13:42:33,080 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:42:43,112 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:42:57,155 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-02 13:43:09,957 WARN L210 SmtUtils]: Spent 8.77s on a formula simplification that was a NOOP. DAG size: 30 [2021-11-02 13:43:22,006 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 34 [2021-11-02 13:43:32,711 WARN L210 SmtUtils]: Spent 8.68s on a formula simplification that was a NOOP. DAG size: 34 [2021-11-02 13:43:39,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:43:39,614 INFO L93 Difference]: Finished difference Result 462 states and 542 transitions. [2021-11-02 13:43:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 13:43:39,617 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.933333333333333) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 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 [2021-11-02 13:43:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:43:39,618 INFO L225 Difference]: With dead ends: 462 [2021-11-02 13:43:39,618 INFO L226 Difference]: Without dead ends: 316 [2021-11-02 13:43:39,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 173999.93ms TimeCoverageRelationStatistics Valid=199, Invalid=1342, Unknown=19, NotChecked=0, Total=1560 [2021-11-02 13:43:39,618 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 1903 mSDsCounter, 0 mSdLazyCounter, 2442 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 726.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.67ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 522 IncrementalHoareTripleChecker+Unchecked, 877.82ms IncrementalHoareTripleChecker+Time [2021-11-02 13:43:39,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 2968 Unknown, 0 Unchecked, 4.67ms Time], IncrementalHoareTripleChecker [4 Valid, 2442 Invalid, 0 Unknown, 522 Unchecked, 877.82ms Time] [2021-11-02 13:43:39,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-02 13:43:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 264. [2021-11-02 13:43:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 260 states have (on average 1.1923076923076923) internal successors, (310), 263 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 310 transitions. [2021-11-02 13:43:39,630 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 310 transitions. Word has length 67 [2021-11-02 13:43:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:43:39,630 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 310 transitions. [2021-11-02 13:43:39,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.933333333333333) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 310 transitions. [2021-11-02 13:43:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 13:43:39,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:43:39,631 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] [2021-11-02 13:43:39,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 13:43:39,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:43:39,845 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)] === [2021-11-02 13:43:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:43:39,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1384277337, now seen corresponding path program 1 times [2021-11-02 13:43:39,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:43:39,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562144931] [2021-11-02 13:43:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:43:39,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:43:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:43:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:43:39,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:43:39,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562144931] [2021-11-02 13:43:39,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562144931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:43:39,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:43:39,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:43:39,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760790622] [2021-11-02 13:43:39,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:43:39,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:43:39,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:43:39,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:43:39,910 INFO L87 Difference]: Start difference. First operand 264 states and 310 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:43:40,069 INFO L93 Difference]: Finished difference Result 312 states and 364 transitions. [2021-11-02 13:43:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:43:40,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 13:43:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:43:40,070 INFO L225 Difference]: With dead ends: 312 [2021-11-02 13:43:40,070 INFO L226 Difference]: Without dead ends: 264 [2021-11-02 13:43:40,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.20ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 13:43:40,071 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 395 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.62ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.89ms IncrementalHoareTripleChecker+Time [2021-11-02 13:43:40,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 0 Invalid, 219 Unknown, 0 Unchecked, 0.62ms Time], IncrementalHoareTripleChecker [22 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 127.89ms Time] [2021-11-02 13:43:40,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-02 13:43:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-11-02 13:43:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 260 states have (on average 1.1884615384615385) internal successors, (309), 263 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:40,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 309 transitions. [2021-11-02 13:43:40,081 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 309 transitions. Word has length 69 [2021-11-02 13:43:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:43:40,081 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 309 transitions. [2021-11-02 13:43:40,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:40,082 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 309 transitions. [2021-11-02 13:43:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 13:43:40,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:43:40,082 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] [2021-11-02 13:43:40,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 13:43:40,083 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)] === [2021-11-02 13:43:40,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:43:40,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1251736731, now seen corresponding path program 1 times [2021-11-02 13:43:40,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:43:40,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442811095] [2021-11-02 13:43:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:43:40,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:43:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:43:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:43:40,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:43:40,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442811095] [2021-11-02 13:43:40,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442811095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:43:40,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:43:40,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 13:43:40,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375342910] [2021-11-02 13:43:40,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 13:43:40,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:43:40,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 13:43:40,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:43:40,203 INFO L87 Difference]: Start difference. First operand 264 states and 309 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) [2021-11-02 13:43:40,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:43:40,764 INFO L93 Difference]: Finished difference Result 542 states and 620 transitions. [2021-11-02 13:43:40,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 13:43:40,765 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 [2021-11-02 13:43:40,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:43:40,766 INFO L225 Difference]: With dead ends: 542 [2021-11-02 13:43:40,766 INFO L226 Difference]: Without dead ends: 420 [2021-11-02 13:43:40,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.29ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-02 13:43:40,766 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 330 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 378.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 457.83ms IncrementalHoareTripleChecker+Time [2021-11-02 13:43:40,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 0 Invalid, 1038 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [54 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 457.83ms Time] [2021-11-02 13:43:40,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-02 13:43:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 264. [2021-11-02 13:43:40,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 260 states have (on average 1.1807692307692308) internal successors, (307), 263 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:40,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 307 transitions. [2021-11-02 13:43:40,781 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 307 transitions. Word has length 74 [2021-11-02 13:43:40,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:43:40,782 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 307 transitions. [2021-11-02 13:43:40,782 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) [2021-11-02 13:43:40,783 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 307 transitions. [2021-11-02 13:43:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 13:43:40,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:43:40,783 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] [2021-11-02 13:43:40,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 13:43:40,783 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)] === [2021-11-02 13:43:40,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:43:40,784 INFO L85 PathProgramCache]: Analyzing trace with hash -829034905, now seen corresponding path program 1 times [2021-11-02 13:43:40,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:43:40,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523893712] [2021-11-02 13:43:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:43:40,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:43:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:43:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 13:43:40,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:43:40,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523893712] [2021-11-02 13:43:40,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523893712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:43:40,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:43:40,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:43:40,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944383119] [2021-11-02 13:43:40,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:43:40,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:43:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:43:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:43:40,843 INFO L87 Difference]: Start difference. First operand 264 states and 307 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:43:41,193 INFO L93 Difference]: Finished difference Result 447 states and 512 transitions. [2021-11-02 13:43:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 13:43:41,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 [2021-11-02 13:43:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:43:41,196 INFO L225 Difference]: With dead ends: 447 [2021-11-02 13:43:41,196 INFO L226 Difference]: Without dead ends: 317 [2021-11-02 13:43:41,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.96ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 13:43:41,196 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 126 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 262.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 314.46ms IncrementalHoareTripleChecker+Time [2021-11-02 13:43:41,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 0 Invalid, 723 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [15 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 314.46ms Time] [2021-11-02 13:43:41,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-02 13:43:41,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 252. [2021-11-02 13:43:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 248 states have (on average 1.1693548387096775) internal successors, (290), 251 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 290 transitions. [2021-11-02 13:43:41,207 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 290 transitions. Word has length 74 [2021-11-02 13:43:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:43:41,208 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 290 transitions. [2021-11-02 13:43:41,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 290 transitions. [2021-11-02 13:43:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 13:43:41,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:43:41,208 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 13:43:41,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 13:43:41,209 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)] === [2021-11-02 13:43:41,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:43:41,209 INFO L85 PathProgramCache]: Analyzing trace with hash -292936060, now seen corresponding path program 1 times [2021-11-02 13:43:41,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:43:41,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995532405] [2021-11-02 13:43:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:43:41,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:43:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:43:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:43:41,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:43:41,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995532405] [2021-11-02 13:43:41,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995532405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:43:41,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143362539] [2021-11-02 13:43:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:43:41,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:43:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:43:41,328 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) [2021-11-02 13:43:41,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 13:43:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:43:41,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 13:43:41,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:43:41,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 13:43:41,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:43:41,691 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 23 treesize of output 22 [2021-11-02 13:43:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:43:41,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:43:41,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-02 13:43:41,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:43:41,892 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 27 treesize of output 26 [2021-11-02 13:43:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:43:42,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143362539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:43:42,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:43:42,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2021-11-02 13:43:42,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281085974] [2021-11-02 13:43:42,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 13:43:42,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:43:42,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 13:43:42,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-11-02 13:43:42,004 INFO L87 Difference]: Start difference. First operand 252 states and 290 transitions. Second operand has 28 states, 28 states have (on average 6.678571428571429) internal successors, (187), 28 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:43:43,288 INFO L93 Difference]: Finished difference Result 481 states and 558 transitions. [2021-11-02 13:43:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 13:43:43,289 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.678571428571429) internal successors, (187), 28 states have internal predecessors, (187), 0 states have call successors, (0), 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 [2021-11-02 13:43:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:43:43,290 INFO L225 Difference]: With dead ends: 481 [2021-11-02 13:43:43,290 INFO L226 Difference]: Without dead ends: 361 [2021-11-02 13:43:43,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 752.08ms TimeCoverageRelationStatistics Valid=645, Invalid=3137, Unknown=0, NotChecked=0, Total=3782 [2021-11-02 13:43:43,291 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 250 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 618.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.58ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 776.52ms IncrementalHoareTripleChecker+Time [2021-11-02 13:43:43,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 0 Invalid, 2944 Unknown, 0 Unchecked, 3.58ms Time], IncrementalHoareTripleChecker [64 Valid, 2494 Invalid, 0 Unknown, 386 Unchecked, 776.52ms Time] [2021-11-02 13:43:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-02 13:43:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 266. [2021-11-02 13:43:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 262 states have (on average 1.1717557251908397) internal successors, (307), 265 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 307 transitions. [2021-11-02 13:43:43,305 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 307 transitions. Word has length 75 [2021-11-02 13:43:43,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:43:43,305 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 307 transitions. [2021-11-02 13:43:43,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.678571428571429) internal successors, (187), 28 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 307 transitions. [2021-11-02 13:43:43,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 13:43:43,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:43:43,311 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:43:43,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 13:43:43,530 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 [2021-11-02 13:43:43,530 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)] === [2021-11-02 13:43:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:43:43,531 INFO L85 PathProgramCache]: Analyzing trace with hash -426949566, now seen corresponding path program 1 times [2021-11-02 13:43:43,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:43:43,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417016287] [2021-11-02 13:43:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:43:43,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:43:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:43:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 13:43:43,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:43:43,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417016287] [2021-11-02 13:43:43,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417016287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:43:43,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:43:43,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:43:43,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035799772] [2021-11-02 13:43:43,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:43:43,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:43:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:43:43,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:43:43,571 INFO L87 Difference]: Start difference. First operand 266 states and 307 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:43:43,745 INFO L93 Difference]: Finished difference Result 446 states and 515 transitions. [2021-11-02 13:43:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 13:43:43,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2021-11-02 13:43:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:43:43,746 INFO L225 Difference]: With dead ends: 446 [2021-11-02 13:43:43,746 INFO L226 Difference]: Without dead ends: 291 [2021-11-02 13:43:43,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.62ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:43:43,747 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.43ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.52ms IncrementalHoareTripleChecker+Time [2021-11-02 13:43:43,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 332 Unknown, 0 Unchecked, 0.43ms Time], IncrementalHoareTripleChecker [17 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 153.52ms Time] [2021-11-02 13:43:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-02 13:43:43,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 255. [2021-11-02 13:43:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 251 states have (on average 1.1434262948207172) internal successors, (287), 254 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:43,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 287 transitions. [2021-11-02 13:43:43,760 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 287 transitions. Word has length 75 [2021-11-02 13:43:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:43:43,760 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 287 transitions. [2021-11-02 13:43:43,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 287 transitions. [2021-11-02 13:43:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 13:43:43,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:43:43,761 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] [2021-11-02 13:43:43,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-02 13:43:43,762 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)] === [2021-11-02 13:43:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:43:43,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1620082764, now seen corresponding path program 2 times [2021-11-02 13:43:43,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:43:43,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649087902] [2021-11-02 13:43:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:43:43,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:43:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:43:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 13:43:43,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:43:43,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649087902] [2021-11-02 13:43:43,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649087902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:43:43,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677535263] [2021-11-02 13:43:43,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 13:43:43,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:43:43,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:43:43,912 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) [2021-11-02 13:43:43,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 13:43:44,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 13:43:44,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 13:43:44,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 13:43:44,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:43:44,084 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:43:44,085 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 [2021-11-02 13:43:44,094 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-02 13:43:44,095 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 [2021-11-02 13:43:48,221 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-02 13:43:48,222 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 [2021-11-02 13:43:48,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:43:48,236 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 [2021-11-02 13:43:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 13:43:48,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:43:48,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677535263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:43:48,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 13:43:48,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 20 [2021-11-02 13:43:48,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104623829] [2021-11-02 13:43:48,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 13:43:48,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:43:48,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 13:43:48,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-11-02 13:43:48,324 INFO L87 Difference]: Start difference. First operand 255 states and 287 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) [2021-11-02 13:43:48,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:43:48,483 INFO L93 Difference]: Finished difference Result 308 states and 346 transitions. [2021-11-02 13:43:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 13:43:48,484 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 [2021-11-02 13:43:48,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:43:48,485 INFO L225 Difference]: With dead ends: 308 [2021-11-02 13:43:48,485 INFO L226 Difference]: Without dead ends: 255 [2021-11-02 13:43:48,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2790.80ms TimeCoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-02 13:43:48,485 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 119.04ms IncrementalHoareTripleChecker+Time [2021-11-02 13:43:48,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 705 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [1 Valid, 308 Invalid, 0 Unknown, 396 Unchecked, 119.04ms Time] [2021-11-02 13:43:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-02 13:43:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 239. [2021-11-02 13:43:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 238 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 268 transitions. [2021-11-02 13:43:48,498 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 268 transitions. Word has length 75 [2021-11-02 13:43:48,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:43:48,499 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 268 transitions. [2021-11-02 13:43:48,499 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) [2021-11-02 13:43:48,499 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 268 transitions. [2021-11-02 13:43:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 13:43:48,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:43:48,500 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 13:43:48,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-02 13:43:48,717 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,SelfDestructingSolverStorable27 [2021-11-02 13:43:48,717 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)] === [2021-11-02 13:43:48,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:43:48,717 INFO L85 PathProgramCache]: Analyzing trace with hash 39188996, now seen corresponding path program 1 times [2021-11-02 13:43:48,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:43:48,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230245838] [2021-11-02 13:43:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:43:48,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:43:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:43:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 13:43:48,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:43:48,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230245838] [2021-11-02 13:43:48,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230245838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:43:48,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:43:48,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 13:43:48,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047610269] [2021-11-02 13:43:48,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 13:43:48,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:43:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 13:43:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:43:48,802 INFO L87 Difference]: Start difference. First operand 239 states and 268 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:43:49,270 INFO L93 Difference]: Finished difference Result 424 states and 469 transitions. [2021-11-02 13:43:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 13:43:49,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2021-11-02 13:43:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:43:49,271 INFO L225 Difference]: With dead ends: 424 [2021-11-02 13:43:49,271 INFO L226 Difference]: Without dead ends: 267 [2021-11-02 13:43:49,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.37ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-02 13:43:49,272 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 134 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 341.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.66ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 416.95ms IncrementalHoareTripleChecker+Time [2021-11-02 13:43:49,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 0 Invalid, 982 Unknown, 0 Unchecked, 1.66ms Time], IncrementalHoareTripleChecker [26 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 416.95ms Time] [2021-11-02 13:43:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-02 13:43:49,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 136. [2021-11-02 13:43:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.128787878787879) internal successors, (149), 135 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 149 transitions. [2021-11-02 13:43:49,280 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 149 transitions. Word has length 75 [2021-11-02 13:43:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:43:49,280 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 149 transitions. [2021-11-02 13:43:49,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:43:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 149 transitions. [2021-11-02 13:43:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 13:43:49,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:43:49,280 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] [2021-11-02 13:43:49,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-02 13:43:49,280 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 13:43:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:43:49,281 INFO L85 PathProgramCache]: Analyzing trace with hash 841974699, now seen corresponding path program 1 times [2021-11-02 13:43:49,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:43:49,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721034734] [2021-11-02 13:43:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:43:49,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:43:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:43:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:43:49,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:43:49,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721034734] [2021-11-02 13:43:49,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721034734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:43:49,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072572926] [2021-11-02 13:43:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:43:49,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:43:49,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:43:49,596 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) [2021-11-02 13:43:49,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 13:43:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:43:49,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-02 13:43:49,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:43:49,775 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 [2021-11-02 13:43:49,779 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 [2021-11-02 13:43:51,059 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-02 13:43:51,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 68 [2021-11-02 13:43:51,066 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-02 13:43:51,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-11-02 13:43:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:43:51,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:43:51,982 INFO L354 Elim1Store]: treesize reduction 141, result has 15.1 percent of original size [2021-11-02 13:43:51,983 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 2616 treesize of output 2252 [2021-11-02 13:43:52,220 INFO L354 Elim1Store]: treesize reduction 385, result has 24.2 percent of original size [2021-11-02 13:43:52,221 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 5566 treesize of output 5226 [2021-11-02 13:43:52,365 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-02 13:43:52,365 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 4432 treesize of output 4304 [2021-11-02 13:43:57,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:43:57,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-02 13:43:58,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:43:58,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 95 [2021-11-02 13:43:58,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:43:58,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 95 [2021-11-02 13:43:58,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:43:59,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:43:59,003 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 266 [2021-11-02 13:44:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:00,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072572926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:44:00,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:44:00,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 22] total 49 [2021-11-02 13:44:00,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603054881] [2021-11-02 13:44:00,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 13:44:00,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:44:00,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 13:44:00,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2073, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 13:44:00,576 INFO L87 Difference]: Start difference. First operand 136 states and 149 transitions. Second operand has 49 states, 49 states have (on average 3.5918367346938775) internal successors, (176), 49 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:44:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:44:07,174 INFO L93 Difference]: Finished difference Result 575 states and 618 transitions. [2021-11-02 13:44:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-02 13:44:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.5918367346938775) internal successors, (176), 49 states have internal predecessors, (176), 0 states have call successors, (0), 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 [2021-11-02 13:44:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:44:07,176 INFO L225 Difference]: With dead ends: 575 [2021-11-02 13:44:07,176 INFO L226 Difference]: Without dead ends: 458 [2021-11-02 13:44:07,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 5218.33ms TimeCoverageRelationStatistics Valid=2579, Invalid=7723, Unknown=0, NotChecked=0, Total=10302 [2021-11-02 13:44:07,179 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2741 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 4392 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1950.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2741 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.21ms SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 4392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2301.35ms IncrementalHoareTripleChecker+Time [2021-11-02 13:44:07,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2741 Valid, 0 Invalid, 4808 Unknown, 0 Unchecked, 12.21ms Time], IncrementalHoareTripleChecker [416 Valid, 4392 Invalid, 0 Unknown, 0 Unchecked, 2301.35ms Time] [2021-11-02 13:44:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-02 13:44:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 251. [2021-11-02 13:44:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 247 states have (on average 1.1174089068825912) internal successors, (276), 250 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) [2021-11-02 13:44:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 276 transitions. [2021-11-02 13:44:07,211 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 276 transitions. Word has length 77 [2021-11-02 13:44:07,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:44:07,211 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 276 transitions. [2021-11-02 13:44:07,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.5918367346938775) internal successors, (176), 49 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:44:07,211 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 276 transitions. [2021-11-02 13:44:07,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 13:44:07,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:44:07,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:44:07,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 13:44:07,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:44:07,430 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 13:44:07,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:44:07,430 INFO L85 PathProgramCache]: Analyzing trace with hash 32628073, now seen corresponding path program 1 times [2021-11-02 13:44:07,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:44:07,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994269656] [2021-11-02 13:44:07,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:44:07,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:44:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:44:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:07,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:44:07,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994269656] [2021-11-02 13:44:07,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994269656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:44:07,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390505319] [2021-11-02 13:44:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:44:07,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:44:07,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:44:07,602 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) [2021-11-02 13:44:07,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 13:44:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:44:07,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-02 13:44:07,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:44:07,750 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 13:44:07,752 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 29 treesize of output 17 [2021-11-02 13:44:09,127 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 41 treesize of output 29 [2021-11-02 13:44:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:09,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:44:09,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 349 treesize of output 333 [2021-11-02 13:44:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:09,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390505319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:44:09,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:44:09,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 17] total 37 [2021-11-02 13:44:09,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473475425] [2021-11-02 13:44:09,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 13:44:09,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:44:09,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 13:44:09,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 13:44:09,582 INFO L87 Difference]: Start difference. First operand 251 states and 276 transitions. Second operand has 37 states, 37 states have (on average 4.54054054054054) internal successors, (168), 37 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) [2021-11-02 13:44:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:44:11,137 INFO L93 Difference]: Finished difference Result 391 states and 416 transitions. [2021-11-02 13:44:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 13:44:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.54054054054054) internal successors, (168), 37 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 [2021-11-02 13:44:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:44:11,139 INFO L225 Difference]: With dead ends: 391 [2021-11-02 13:44:11,139 INFO L226 Difference]: Without dead ends: 340 [2021-11-02 13:44:11,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1616.06ms TimeCoverageRelationStatistics Valid=332, Invalid=2320, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 13:44:11,140 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 529 mSDsluCounter, 2219 mSDsCounter, 0 mSdLazyCounter, 3010 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 871.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.92ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 574 IncrementalHoareTripleChecker+Unchecked, 1050.36ms IncrementalHoareTripleChecker+Time [2021-11-02 13:44:11,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 0 Invalid, 3616 Unknown, 0 Unchecked, 5.92ms Time], IncrementalHoareTripleChecker [32 Valid, 3010 Invalid, 0 Unknown, 574 Unchecked, 1050.36ms Time] [2021-11-02 13:44:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-02 13:44:11,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 248. [2021-11-02 13:44:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 244 states have (on average 1.1147540983606556) internal successors, (272), 247 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) [2021-11-02 13:44:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 272 transitions. [2021-11-02 13:44:11,156 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 272 transitions. Word has length 77 [2021-11-02 13:44:11,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:44:11,157 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 272 transitions. [2021-11-02 13:44:11,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.54054054054054) internal successors, (168), 37 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) [2021-11-02 13:44:11,157 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 272 transitions. [2021-11-02 13:44:11,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 13:44:11,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:44:11,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:44:11,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 13:44:11,373 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,SelfDestructingSolverStorable30 [2021-11-02 13:44:11,373 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)] === [2021-11-02 13:44:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:44:11,374 INFO L85 PathProgramCache]: Analyzing trace with hash 866410317, now seen corresponding path program 1 times [2021-11-02 13:44:11,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:44:11,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382323279] [2021-11-02 13:44:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:44:11,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:44:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:44:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:11,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:44:11,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382323279] [2021-11-02 13:44:11,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382323279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:44:11,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984956054] [2021-11-02 13:44:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:44:11,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:44:11,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:44:11,513 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) [2021-11-02 13:44:11,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 13:44:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:44:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 13:44:11,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:44:11,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:44:11,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:44:11,695 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 [2021-11-02 13:44:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:44:11,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:44:11,774 INFO L354 Elim1Store]: treesize reduction 68, result has 29.2 percent of original size [2021-11-02 13:44:11,775 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 [2021-11-02 13:44:12,332 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-11-02 13:44:12,332 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 [2021-11-02 13:44:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:12,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:44:20,970 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 3214 treesize of output 3182 [2021-11-02 13:44:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:21,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984956054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:44:21,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:44:21,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2021-11-02 13:44:21,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328959110] [2021-11-02 13:44:21,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 13:44:21,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:44:21,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 13:44:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=583, Unknown=2, NotChecked=0, Total=650 [2021-11-02 13:44:21,401 INFO L87 Difference]: Start difference. First operand 248 states and 272 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:44:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:44:22,709 INFO L93 Difference]: Finished difference Result 472 states and 510 transitions. [2021-11-02 13:44:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 13:44:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 13:44:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:44:22,711 INFO L225 Difference]: With dead ends: 472 [2021-11-02 13:44:22,711 INFO L226 Difference]: Without dead ends: 364 [2021-11-02 13:44:22,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 9063.55ms TimeCoverageRelationStatistics Valid=176, Invalid=1382, Unknown=2, NotChecked=0, Total=1560 [2021-11-02 13:44:22,712 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 747 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 744.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.28ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 880.91ms IncrementalHoareTripleChecker+Time [2021-11-02 13:44:22,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 0 Invalid, 2574 Unknown, 0 Unchecked, 5.28ms Time], IncrementalHoareTripleChecker [53 Valid, 2241 Invalid, 0 Unknown, 280 Unchecked, 880.91ms Time] [2021-11-02 13:44:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-02 13:44:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 256. [2021-11-02 13:44:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 252 states have (on average 1.1111111111111112) internal successors, (280), 255 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:44:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 280 transitions. [2021-11-02 13:44:22,729 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 280 transitions. Word has length 79 [2021-11-02 13:44:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:44:22,729 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 280 transitions. [2021-11-02 13:44:22,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:44:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 280 transitions. [2021-11-02 13:44:22,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 13:44:22,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:44:22,730 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] [2021-11-02 13:44:22,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 13:44:22,949 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,SelfDestructingSolverStorable31 [2021-11-02 13:44:22,949 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)] === [2021-11-02 13:44:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:44:22,950 INFO L85 PathProgramCache]: Analyzing trace with hash 561523053, now seen corresponding path program 1 times [2021-11-02 13:44:22,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:44:22,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308268431] [2021-11-02 13:44:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:44:22,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:44:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:44:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 13:44:23,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:44:23,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308268431] [2021-11-02 13:44:23,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308268431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:44:23,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:44:23,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:44:23,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924341454] [2021-11-02 13:44:23,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:44:23,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:44:23,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:44:23,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:44:23,007 INFO L87 Difference]: Start difference. First operand 256 states and 280 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) [2021-11-02 13:44:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:44:23,277 INFO L93 Difference]: Finished difference Result 313 states and 342 transitions. [2021-11-02 13:44:23,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:44:23,277 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 [2021-11-02 13:44:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:44:23,278 INFO L225 Difference]: With dead ends: 313 [2021-11-02 13:44:23,278 INFO L226 Difference]: Without dead ends: 300 [2021-11-02 13:44:23,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.28ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 13:44:23,279 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 121 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.83ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 231.39ms IncrementalHoareTripleChecker+Time [2021-11-02 13:44:23,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 0 Invalid, 571 Unknown, 0 Unchecked, 0.83ms Time], IncrementalHoareTripleChecker [11 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 231.39ms Time] [2021-11-02 13:44:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-02 13:44:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 257. [2021-11-02 13:44:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 253 states have (on average 1.1027667984189724) internal successors, (279), 256 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:44:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 279 transitions. [2021-11-02 13:44:23,296 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 279 transitions. Word has length 80 [2021-11-02 13:44:23,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:44:23,296 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 279 transitions. [2021-11-02 13:44:23,296 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) [2021-11-02 13:44:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 279 transitions. [2021-11-02 13:44:23,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 13:44:23,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:44:23,297 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] [2021-11-02 13:44:23,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-02 13:44:23,297 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 13:44:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:44:23,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1542092017, now seen corresponding path program 1 times [2021-11-02 13:44:23,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:44:23,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635884459] [2021-11-02 13:44:23,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:44:23,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:44:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:44:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 13:44:23,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:44:23,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635884459] [2021-11-02 13:44:23,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635884459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:44:23,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:44:23,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:44:23,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430931467] [2021-11-02 13:44:23,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:44:23,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:44:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:44:23,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:44:23,355 INFO L87 Difference]: Start difference. First operand 257 states and 279 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) [2021-11-02 13:44:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:44:23,556 INFO L93 Difference]: Finished difference Result 257 states and 279 transitions. [2021-11-02 13:44:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 13:44:23,556 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 [2021-11-02 13:44:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:44:23,557 INFO L225 Difference]: With dead ends: 257 [2021-11-02 13:44:23,557 INFO L226 Difference]: Without dead ends: 255 [2021-11-02 13:44:23,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.27ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:44:23,558 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.46ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.56ms IncrementalHoareTripleChecker+Time [2021-11-02 13:44:23,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 293 Unknown, 0 Unchecked, 0.46ms Time], IncrementalHoareTripleChecker [1 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 170.56ms Time] [2021-11-02 13:44:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-02 13:44:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2021-11-02 13:44:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 252 states have (on average 1.0952380952380953) internal successors, (276), 254 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) [2021-11-02 13:44:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 276 transitions. [2021-11-02 13:44:23,577 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 276 transitions. Word has length 82 [2021-11-02 13:44:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:44:23,577 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 276 transitions. [2021-11-02 13:44:23,577 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) [2021-11-02 13:44:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 276 transitions. [2021-11-02 13:44:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 13:44:23,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:44:23,578 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] [2021-11-02 13:44:23,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-02 13:44:23,578 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 13:44:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:44:23,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1488938402, now seen corresponding path program 1 times [2021-11-02 13:44:23,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:44:23,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914584634] [2021-11-02 13:44:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:44:23,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:44:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:44:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 13:44:23,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:44:23,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914584634] [2021-11-02 13:44:23,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914584634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:44:23,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:44:23,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 13:44:23,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962079493] [2021-11-02 13:44:23,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 13:44:23,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:44:23,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 13:44:23,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:44:23,724 INFO L87 Difference]: Start difference. First operand 255 states and 276 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:44:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:44:23,951 INFO L93 Difference]: Finished difference Result 255 states and 276 transitions. [2021-11-02 13:44:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 13:44:23,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-02 13:44:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:44:23,952 INFO L225 Difference]: With dead ends: 255 [2021-11-02 13:44:23,953 INFO L226 Difference]: Without dead ends: 253 [2021-11-02 13:44:23,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 44.39ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-02 13:44:23,953 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 221 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.65ms IncrementalHoareTripleChecker+Time [2021-11-02 13:44:23,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 0 Invalid, 382 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [6 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 180.65ms Time] [2021-11-02 13:44:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-02 13:44:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-11-02 13:44:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 251 states have (on average 1.0876494023904382) internal successors, (273), 252 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:44:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 273 transitions. [2021-11-02 13:44:23,974 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 273 transitions. Word has length 85 [2021-11-02 13:44:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:44:23,974 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 273 transitions. [2021-11-02 13:44:23,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:44:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 273 transitions. [2021-11-02 13:44:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 13:44:23,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:44:23,975 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] [2021-11-02 13:44:23,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-02 13:44:23,975 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)] === [2021-11-02 13:44:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:44:23,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1748357123, now seen corresponding path program 1 times [2021-11-02 13:44:23,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:44:23,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349579957] [2021-11-02 13:44:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:44:23,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:44:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:44:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:24,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:44:24,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349579957] [2021-11-02 13:44:24,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349579957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:44:24,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791667054] [2021-11-02 13:44:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:44:24,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:44:24,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:44:24,418 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) [2021-11-02 13:44:24,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 13:44:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:44:24,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-02 13:44:24,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:44:24,623 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:44:24,623 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 [2021-11-02 13:44:24,633 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-02 13:44:24,633 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 [2021-11-02 13:44:27,716 INFO L354 Elim1Store]: treesize reduction 107, result has 28.2 percent of original size [2021-11-02 13:44:27,716 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 [2021-11-02 13:44:27,743 INFO L354 Elim1Store]: treesize reduction 45, result has 53.6 percent of original size [2021-11-02 13:44:27,743 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 [2021-11-02 13:44:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:27,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:44:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:28,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791667054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:44:28,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:44:28,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 16] total 41 [2021-11-02 13:44:28,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126574633] [2021-11-02 13:44:28,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 13:44:28,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:44:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 13:44:28,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 13:44:28,388 INFO L87 Difference]: Start difference. First operand 253 states and 273 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) [2021-11-02 13:44:29,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:44:29,407 INFO L93 Difference]: Finished difference Result 315 states and 339 transitions. [2021-11-02 13:44:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 13:44:29,407 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 [2021-11-02 13:44:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:44:29,408 INFO L225 Difference]: With dead ends: 315 [2021-11-02 13:44:29,410 INFO L226 Difference]: Without dead ends: 260 [2021-11-02 13:44:29,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1847.52ms TimeCoverageRelationStatistics Valid=222, Invalid=2534, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 13:44:29,412 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 343.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 401.14ms IncrementalHoareTripleChecker+Time [2021-11-02 13:44:29,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 1242 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [16 Valid, 805 Invalid, 0 Unknown, 421 Unchecked, 401.14ms Time] [2021-11-02 13:44:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-02 13:44:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 250. [2021-11-02 13:44:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 248 states have (on average 1.0806451612903225) internal successors, (268), 249 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:44:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 268 transitions. [2021-11-02 13:44:29,441 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 268 transitions. Word has length 85 [2021-11-02 13:44:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:44:29,441 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 268 transitions. [2021-11-02 13:44:29,441 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) [2021-11-02 13:44:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 268 transitions. [2021-11-02 13:44:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 13:44:29,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:44:29,442 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] [2021-11-02 13:44:29,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-02 13:44:29,652 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,SelfDestructingSolverStorable35 [2021-11-02 13:44:29,655 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)] === [2021-11-02 13:44:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:44:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1737263547, now seen corresponding path program 1 times [2021-11-02 13:44:29,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:44:29,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256711092] [2021-11-02 13:44:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:44:29,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:44:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:44:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:30,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:44:30,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256711092] [2021-11-02 13:44:30,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256711092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:44:30,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068455274] [2021-11-02 13:44:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:44:30,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:44:30,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:44:30,065 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) [2021-11-02 13:44:30,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 13:44:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:44:30,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-02 13:44:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:44:30,242 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 13:44:30,242 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 [2021-11-02 13:44:30,256 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-02 13:44:30,256 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 [2021-11-02 13:44:32,605 INFO L354 Elim1Store]: treesize reduction 66, result has 17.5 percent of original size [2021-11-02 13:44:32,605 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 [2021-11-02 13:44:32,635 INFO L354 Elim1Store]: treesize reduction 22, result has 64.5 percent of original size [2021-11-02 13:44:32,636 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 [2021-11-02 13:44:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:32,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:44:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:44:33,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068455274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:44:33,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:44:33,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 12] total 39 [2021-11-02 13:44:33,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295210420] [2021-11-02 13:44:33,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 13:44:33,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:44:33,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 13:44:33,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 13:44:33,229 INFO L87 Difference]: Start difference. First operand 250 states and 268 transitions. Second operand has 39 states, 39 states have (on average 5.846153846153846) internal successors, (228), 39 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) [2021-11-02 13:44:33,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:44:33,958 INFO L93 Difference]: Finished difference Result 346 states and 364 transitions. [2021-11-02 13:44:33,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 13:44:33,958 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.846153846153846) internal successors, (228), 39 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 [2021-11-02 13:44:33,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:44:33,959 INFO L225 Difference]: With dead ends: 346 [2021-11-02 13:44:33,959 INFO L226 Difference]: Without dead ends: 300 [2021-11-02 13:44:33,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1135.82ms TimeCoverageRelationStatistics Valid=255, Invalid=2397, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 13:44:33,961 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 215 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 311.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.44ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 536 IncrementalHoareTripleChecker+Unchecked, 362.47ms IncrementalHoareTripleChecker+Time [2021-11-02 13:44:33,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 0 Invalid, 1378 Unknown, 0 Unchecked, 2.44ms Time], IncrementalHoareTripleChecker [16 Valid, 826 Invalid, 0 Unknown, 536 Unchecked, 362.47ms Time] [2021-11-02 13:44:33,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-02 13:44:33,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 239. [2021-11-02 13:44:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 1.0717299578059072) internal successors, (254), 238 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:44:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 254 transitions. [2021-11-02 13:44:33,989 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 254 transitions. Word has length 85 [2021-11-02 13:44:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:44:33,989 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 254 transitions. [2021-11-02 13:44:33,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.846153846153846) internal successors, (228), 39 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) [2021-11-02 13:44:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 254 transitions. [2021-11-02 13:44:33,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 13:44:33,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:44:33,989 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] [2021-11-02 13:44:34,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 13:44:34,206 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,SelfDestructingSolverStorable36 [2021-11-02 13:44:34,206 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 13:44:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:44:34,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1881366369, now seen corresponding path program 2 times [2021-11-02 13:44:34,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:44:34,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217178861] [2021-11-02 13:44:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:44:34,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:44:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:44:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 13:44:34,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:44:34,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217178861] [2021-11-02 13:44:34,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217178861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:44:34,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717230650] [2021-11-02 13:44:34,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 13:44:34,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:44:34,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:44:34,357 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) [2021-11-02 13:44:34,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 13:44:34,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 13:44:34,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 13:44:34,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-02 13:44:34,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:44:34,555 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:44:34,555 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 [2021-11-02 13:44:34,564 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-02 13:44:34,564 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 [2021-11-02 13:44:37,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:44:37,691 INFO L354 Elim1Store]: treesize reduction 12, result has 92.3 percent of original size [2021-11-02 13:44:37,692 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 7 new quantified variables, introduced 12 case distinctions, treesize of input 96 treesize of output 194 [2021-11-02 13:44:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:44:56,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:44:57,741 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 [2021-11-02 13:44:58,128 INFO L354 Elim1Store]: treesize reduction 302, result has 39.4 percent of original size [2021-11-02 13:44:58,131 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 5257 treesize of output 5000 [2021-11-02 13:44:58,340 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-02 13:44:58,341 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 5262 treesize of output 4714 [2021-11-02 13:44:59,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:44:59,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:44:59,377 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 186 treesize of output 194 [2021-11-02 13:45:02,797 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-02 13:45:02,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 27 treesize of output 25 [2021-11-02 13:45:02,807 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 12 treesize of output 8 [2021-11-02 13:45:02,814 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 [2021-11-02 13:45:02,819 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 13:45:02,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 1 [2021-11-02 13:45:02,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:45:02,824 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-02 13:45:02,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 1 [2021-11-02 13:45:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:45:02,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717230650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:45:02,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:45:02,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 15] total 37 [2021-11-02 13:45:02,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160753469] [2021-11-02 13:45:02,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 13:45:02,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:45:02,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 13:45:02,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 13:45:02,883 INFO L87 Difference]: Start difference. First operand 239 states and 254 transitions. Second operand has 37 states, 37 states have (on average 5.351351351351352) internal successors, (198), 37 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) [2021-11-02 13:45:15,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:45:15,758 INFO L93 Difference]: Finished difference Result 439 states and 472 transitions. [2021-11-02 13:45:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 13:45:15,759 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.351351351351352) internal successors, (198), 37 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 [2021-11-02 13:45:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:45:15,760 INFO L225 Difference]: With dead ends: 439 [2021-11-02 13:45:15,760 INFO L226 Difference]: Without dead ends: 357 [2021-11-02 13:45:15,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 13906.77ms TimeCoverageRelationStatistics Valid=494, Invalid=3166, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 13:45:15,776 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 248 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 2223 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 808.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.45ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 691 IncrementalHoareTripleChecker+Unchecked, 941.93ms IncrementalHoareTripleChecker+Time [2021-11-02 13:45:15,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 0 Invalid, 2935 Unknown, 0 Unchecked, 4.45ms Time], IncrementalHoareTripleChecker [21 Valid, 2223 Invalid, 0 Unknown, 691 Unchecked, 941.93ms Time] [2021-11-02 13:45:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-02 13:45:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 247. [2021-11-02 13:45:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 245 states have (on average 1.0693877551020408) internal successors, (262), 246 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:45:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 262 transitions. [2021-11-02 13:45:15,797 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 262 transitions. Word has length 87 [2021-11-02 13:45:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:45:15,797 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 262 transitions. [2021-11-02 13:45:15,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.351351351351352) internal successors, (198), 37 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) [2021-11-02 13:45:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 262 transitions. [2021-11-02 13:45:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 13:45:15,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:45:15,798 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] [2021-11-02 13:45:15,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-02 13:45:16,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:45:16,012 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 13:45:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:45:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash -86539151, now seen corresponding path program 3 times [2021-11-02 13:45:16,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:45:16,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062716686] [2021-11-02 13:45:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:45:16,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:45:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:45:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 13:45:16,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:45:16,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062716686] [2021-11-02 13:45:16,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062716686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:45:16,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042107074] [2021-11-02 13:45:16,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 13:45:16,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:45:16,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:45:16,885 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) [2021-11-02 13:45:16,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 13:45:17,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 13:45:17,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 13:45:17,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 179 conjunts are in the unsatisfiable core [2021-11-02 13:45:17,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:45:17,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:45:17,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:45:17,138 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 [2021-11-02 13:45:17,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:45:17,146 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 [2021-11-02 13:45:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:45:17,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:45:17,268 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 13:45:17,269 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 89 [2021-11-02 13:45:17,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:45:17,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:45:17,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:45:17,280 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-02 13:45:17,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 91 [2021-11-02 13:45:20,976 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-11-02 13:45:20,977 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 156 treesize of output 90 [2021-11-02 13:45:20,988 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-02 13:45:20,989 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 67 treesize of output 39 [2021-11-02 13:45:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:45:21,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:45:26,914 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_aws_linked_list_is_valid_deep_~temp~0.offset Int) (ULTIMATE.start_aws_linked_list_is_valid_deep_~temp~0.base Int)) (let ((.cse8 (+ c_ULTIMATE.start_ensure_linked_list_is_allocated_~list.offset 24))) (let ((.cse3 (let ((.cse9 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0.base) c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0.offset c_ULTIMATE.start_ensure_linked_list_is_allocated_~list.base)))) (store .cse9 c_ULTIMATE.start_ensure_linked_list_is_allocated_~list.base (store (select .cse9 c_ULTIMATE.start_ensure_linked_list_is_allocated_~list.base) .cse8 c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0.base))))) (let ((.cse1 (select (select .cse3 ULTIMATE.start_aws_linked_list_is_valid_deep_~temp~0.base) ULTIMATE.start_aws_linked_list_is_valid_deep_~temp~0.offset)) (.cse6 (let ((.cse7 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0.base) c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0.offset (+ 16 c_ULTIMATE.start_ensure_linked_list_is_allocated_~list.offset))))) (store .cse7 c_ULTIMATE.start_ensure_linked_list_is_allocated_~list.base (store (select .cse7 c_ULTIMATE.start_ensure_linked_list_is_allocated_~list.base) .cse8 c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0.offset))))) (let ((.cse0 (select (select .cse6 ULTIMATE.start_aws_linked_list_is_valid_deep_~temp~0.base) ULTIMATE.start_aws_linked_list_is_valid_deep_~temp~0.offset)) (.cse2 (select .cse3 .cse1))) (or (not (= (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0.offset| 16) .cse0)) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0.base| .cse1)) (not (= ULTIMATE.start_aws_linked_list_is_valid_deep_~temp~0.base (select .cse2 (+ 8 .cse0)))) (let ((.cse4 (select .cse2 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0.offset|)) (.cse5 (+ (select (select .cse6 .cse1) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0.offset|) 8))) (and (= (select (select .cse3 .cse4) .cse5) .cse1) (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0.offset| (select (select .cse6 .cse4) .cse5)))))))))) is different from false [2021-11-02 13:45:37,301 WARN L210 SmtUtils]: Spent 10.16s on a formula simplification. DAG size of input: 860 DAG size of output: 412 [2021-11-02 13:45:37,302 INFO L354 Elim1Store]: treesize reduction 16645, result has 25.2 percent of original size [2021-11-02 13:45:37,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 1 disjoint index pairs (out of 136 index pairs), introduced 24 new quantified variables, introduced 156 case distinctions, treesize of input 118444663 treesize of output 107383114 Killed by 15