./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 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_remove_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 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 21:27:11,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 21:27:11,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 21:27:11,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 21:27:11,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 21:27:11,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 21:27:11,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 21:27:11,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 21:27:11,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 21:27:11,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 21:27:11,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 21:27:11,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 21:27:11,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 21:27:11,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 21:27:11,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 21:27:11,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 21:27:11,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 21:27:11,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 21:27:11,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 21:27:11,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 21:27:11,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 21:27:11,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 21:27:11,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 21:27:11,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 21:27:11,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 21:27:11,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 21:27:11,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 21:27:11,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 21:27:11,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 21:27:11,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 21:27:11,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 21:27:11,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 21:27:11,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 21:27:11,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 21:27:11,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 21:27:11,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 21:27:11,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 21:27:11,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 21:27:11,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 21:27:11,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 21:27:11,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 21:27:11,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 21:27:11,419 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 21:27:11,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 21:27:11,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 21:27:11,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 21:27:11,421 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 21:27:11,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 21:27:11,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 21:27:11,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 21:27:11,422 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 21:27:11,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 21:27:11,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 21:27:11,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 21:27:11,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 21:27:11,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 21:27:11,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 21:27:11,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 21:27:11,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 21:27:11,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 21:27:11,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 21:27:11,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 21:27:11,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 21:27:11,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:27:11,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 21:27:11,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 21:27:11,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 21:27:11,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 21:27:11,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 21:27:11,425 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 21:27:11,425 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 21:27:11,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 21:27:11,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 21:27:11,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2021-11-16 21:27:11,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 21:27:11,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 21:27:11,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 21:27:11,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 21:27:11,611 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 21:27:11,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-11-16 21:27:11,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1beebeb9b/6da83e9dc1054953a30ee4eb08c2b59c/FLAGc6f2a3657 [2021-11-16 21:27:12,164 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 21:27:12,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-11-16 21:27:12,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1beebeb9b/6da83e9dc1054953a30ee4eb08c2b59c/FLAGc6f2a3657 [2021-11-16 21:27:12,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1beebeb9b/6da83e9dc1054953a30ee4eb08c2b59c [2021-11-16 21:27:12,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 21:27:12,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 21:27:12,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 21:27:12,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 21:27:12,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 21:27:12,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:27:12" (1/1) ... [2021-11-16 21:27:12,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3987d32a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:12, skipping insertion in model container [2021-11-16 21:27:12,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:27:12" (1/1) ... [2021-11-16 21:27:12,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 21:27:12,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 21:27:12,694 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2021-11-16 21:27:12,699 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2021-11-16 21:27:12,718 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:27:12,722 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:27:13,424 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,425 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,426 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,427 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,427 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,434 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,434 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,435 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,435 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,436 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,437 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,437 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,438 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,629 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:27:13,630 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:27:13,630 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:27:13,631 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:27:13,632 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:27:13,632 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:27:13,632 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:27:13,633 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:27:13,634 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:27:13,638 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:27:13,746 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:27:13,773 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:27:13,787 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 21:27:13,805 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2021-11-16 21:27:13,806 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2021-11-16 21:27:13,807 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:27:13,807 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:27:13,838 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,838 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,839 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,839 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,839 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,847 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,848 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,848 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,849 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,849 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,850 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,850 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,850 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:27:13,880 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:27:13,881 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:27:13,881 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:27:13,882 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:27:13,882 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:27:13,883 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:27:13,883 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:27:13,883 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:27:13,884 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:27:13,884 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:27:13,896 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:27:13,914 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:27:14,033 INFO L208 MainTranslator]: Completed translation [2021-11-16 21:27:14,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:14 WrapperNode [2021-11-16 21:27:14,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 21:27:14,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 21:27:14,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 21:27:14,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 21:27:14,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:14" (1/1) ... [2021-11-16 21:27:14,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:14" (1/1) ... [2021-11-16 21:27:14,133 INFO L137 Inliner]: procedures = 681, calls = 1050, calls flagged for inlining = 49, calls inlined = 4, statements flattened = 88 [2021-11-16 21:27:14,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 21:27:14,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 21:27:14,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 21:27:14,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 21:27:14,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:14" (1/1) ... [2021-11-16 21:27:14,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:14" (1/1) ... [2021-11-16 21:27:14,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:14" (1/1) ... [2021-11-16 21:27:14,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:14" (1/1) ... [2021-11-16 21:27:14,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:14" (1/1) ... [2021-11-16 21:27:14,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:14" (1/1) ... [2021-11-16 21:27:14,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:14" (1/1) ... [2021-11-16 21:27:14,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 21:27:14,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 21:27:14,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 21:27:14,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 21:27:14,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:14" (1/1) ... [2021-11-16 21:27:14,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:27:14,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:14,212 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) [2021-11-16 21:27:14,224 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 [2021-11-16 21:27:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-16 21:27:14,252 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-16 21:27:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-11-16 21:27:14,253 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-11-16 21:27:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 21:27:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 21:27:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 21:27:14,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 21:27:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-16 21:27:14,254 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-16 21:27:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 21:27:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 21:27:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 21:27:14,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 21:27:14,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-16 21:27:14,255 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-16 21:27:14,255 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 21:27:14,255 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 21:27:14,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 21:27:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 21:27:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 21:27:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-16 21:27:14,256 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-16 21:27:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 21:27:14,438 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 21:27:14,439 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 21:27:14,642 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 21:27:14,650 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 21:27:14,651 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-16 21:27:14,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:27:14 BoogieIcfgContainer [2021-11-16 21:27:14,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 21:27:14,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 21:27:14,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 21:27:14,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 21:27:14,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 09:27:12" (1/3) ... [2021-11-16 21:27:14,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510f309f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:27:14, skipping insertion in model container [2021-11-16 21:27:14,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:27:14" (2/3) ... [2021-11-16 21:27:14,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510f309f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:27:14, skipping insertion in model container [2021-11-16 21:27:14,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:27:14" (3/3) ... [2021-11-16 21:27:14,660 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2021-11-16 21:27:14,664 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 21:27:14,665 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 21:27:14,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 21:27:14,705 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 [2021-11-16 21:27:14,705 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 21:27:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-16 21:27:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-16 21:27:14,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:14,727 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:14,727 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:14,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:14,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1155526354, now seen corresponding path program 1 times [2021-11-16 21:27:14,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:14,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048335917] [2021-11-16 21:27:14,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:14,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:27:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:27:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 21:27:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:27:15,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:15,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048335917] [2021-11-16 21:27:15,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048335917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:15,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:15,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 21:27:15,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884081986] [2021-11-16 21:27:15,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:15,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:27:15,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:15,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:27:15,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:27:15,187 INFO L87 Difference]: Start difference. First operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-16 21:27:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:15,317 INFO L93 Difference]: Finished difference Result 147 states and 204 transitions. [2021-11-16 21:27:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 21:27:15,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-11-16 21:27:15,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:15,328 INFO L225 Difference]: With dead ends: 147 [2021-11-16 21:27:15,328 INFO L226 Difference]: Without dead ends: 73 [2021-11-16 21:27:15,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-16 21:27:15,335 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 28 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:15,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 434 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:27:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-16 21:27:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-11-16 21:27:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-16 21:27:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-11-16 21:27:15,384 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 48 [2021-11-16 21:27:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:15,385 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-11-16 21:27:15,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-16 21:27:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-11-16 21:27:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-16 21:27:15,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:15,387 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:15,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 21:27:15,388 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:15,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:15,388 INFO L85 PathProgramCache]: Analyzing trace with hash 209823880, now seen corresponding path program 1 times [2021-11-16 21:27:15,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:15,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47713972] [2021-11-16 21:27:15,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:15,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:27:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:27:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:27:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:27:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:27:15,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:15,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47713972] [2021-11-16 21:27:15,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47713972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:15,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:15,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 21:27:15,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931031106] [2021-11-16 21:27:15,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:15,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 21:27:15,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:15,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 21:27:15,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:27:15,552 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 21:27:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:15,811 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2021-11-16 21:27:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 21:27:15,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2021-11-16 21:27:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:15,814 INFO L225 Difference]: With dead ends: 143 [2021-11-16 21:27:15,814 INFO L226 Difference]: Without dead ends: 77 [2021-11-16 21:27:15,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-16 21:27:15,818 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 68 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:15,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 244 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:27:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-16 21:27:15,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-11-16 21:27:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2021-11-16 21:27:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-11-16 21:27:15,846 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 54 [2021-11-16 21:27:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:15,846 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-11-16 21:27:15,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 21:27:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-11-16 21:27:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-16 21:27:15,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:15,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:15,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-16 21:27:15,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash 637356428, now seen corresponding path program 1 times [2021-11-16 21:27:15,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:15,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50327897] [2021-11-16 21:27:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:15,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:27:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:27:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:27:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:15,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:27:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:27:16,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:16,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50327897] [2021-11-16 21:27:16,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50327897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:16,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:16,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 21:27:16,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337815552] [2021-11-16 21:27:16,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:16,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:27:16,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:27:16,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:27:16,018 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 21:27:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:16,196 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2021-11-16 21:27:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 21:27:16,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2021-11-16 21:27:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:16,197 INFO L225 Difference]: With dead ends: 87 [2021-11-16 21:27:16,197 INFO L226 Difference]: Without dead ends: 85 [2021-11-16 21:27:16,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-16 21:27:16,198 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 46 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:16,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 267 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:27:16,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-16 21:27:16,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-11-16 21:27:16,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 55 states have internal predecessors, (61), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:27:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2021-11-16 21:27:16,204 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 54 [2021-11-16 21:27:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:16,204 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2021-11-16 21:27:16,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 21:27:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2021-11-16 21:27:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-16 21:27:16,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:16,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:16,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-16 21:27:16,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:16,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2089548669, now seen corresponding path program 1 times [2021-11-16 21:27:16,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:16,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920590942] [2021-11-16 21:27:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:16,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:27:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:27:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:27:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:27:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:27:16,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:16,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920590942] [2021-11-16 21:27:16,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920590942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:16,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:27:16,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 21:27:16,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194955801] [2021-11-16 21:27:16,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:16,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:27:16,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:16,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:27:16,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:27:16,385 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 21:27:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:16,532 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2021-11-16 21:27:16,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:27:16,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2021-11-16 21:27:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:16,533 INFO L225 Difference]: With dead ends: 145 [2021-11-16 21:27:16,533 INFO L226 Difference]: Without dead ends: 82 [2021-11-16 21:27:16,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:27:16,534 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 39 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:16,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 177 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:27:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-16 21:27:16,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-16 21:27:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.169811320754717) internal successors, (62), 56 states have internal predecessors, (62), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:27:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-11-16 21:27:16,540 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 54 [2021-11-16 21:27:16,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:16,540 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-11-16 21:27:16,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 21:27:16,540 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-11-16 21:27:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-16 21:27:16,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:16,541 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:16,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-16 21:27:16,541 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:16,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:16,542 INFO L85 PathProgramCache]: Analyzing trace with hash -247571742, now seen corresponding path program 1 times [2021-11-16 21:27:16,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:16,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906883403] [2021-11-16 21:27:16,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:16,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:27:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:27:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:27:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 21:27:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:27:16,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:16,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906883403] [2021-11-16 21:27:16,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906883403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:16,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160668220] [2021-11-16 21:27:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:16,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:16,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:16,722 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) [2021-11-16 21:27:16,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 21:27:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:17,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-16 21:27:17,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:17,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-16 21:27:17,668 WARN L322 ript$VariableManager]: TermVariabe |aux_div_v_#Ultimate.C_memset_#t~loopctr680_5_65| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-16 21:27:17,668 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_v_#Ultimate.C_memset_#t~loopctr680_5_65| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-16 21:27:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:27:17,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:27:18,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-16 21:27:18,026 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 26 treesize of output 24 [2021-11-16 21:27:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:27:18,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160668220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:27:18,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:27:18,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2021-11-16 21:27:18,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463869488] [2021-11-16 21:27:18,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:27:18,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-16 21:27:18,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:18,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-16 21:27:18,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-11-16 21:27:18,119 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-16 21:27:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:18,548 INFO L93 Difference]: Finished difference Result 153 states and 185 transitions. [2021-11-16 21:27:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 21:27:18,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 55 [2021-11-16 21:27:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:18,550 INFO L225 Difference]: With dead ends: 153 [2021-11-16 21:27:18,550 INFO L226 Difference]: Without dead ends: 90 [2021-11-16 21:27:18,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-11-16 21:27:18,551 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 43 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:18,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 356 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 386 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2021-11-16 21:27:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-16 21:27:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2021-11-16 21:27:18,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 57 states have internal predecessors, (63), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:27:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-11-16 21:27:18,557 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 55 [2021-11-16 21:27:18,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:18,557 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-11-16 21:27:18,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-16 21:27:18,557 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-11-16 21:27:18,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-16 21:27:18,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:18,558 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:18,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:18,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:18,778 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:18,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:18,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1019138147, now seen corresponding path program 2 times [2021-11-16 21:27:18,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:18,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455998009] [2021-11-16 21:27:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:18,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:18,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:27:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:18,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:18,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:27:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:18,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:18,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:18,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:27:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:18,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:27:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:27:18,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:18,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455998009] [2021-11-16 21:27:18,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455998009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:18,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136814712] [2021-11-16 21:27:18,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:27:18,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:18,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:18,993 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) [2021-11-16 21:27:19,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 21:27:19,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:27:19,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:27:19,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-16 21:27:19,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:27:19,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:27:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:27:19,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136814712] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:27:19,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:27:19,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-11-16 21:27:19,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907918351] [2021-11-16 21:27:19,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:27:19,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 21:27:19,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:19,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 21:27:19,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-16 21:27:19,449 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 21:27:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:19,787 INFO L93 Difference]: Finished difference Result 152 states and 185 transitions. [2021-11-16 21:27:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 21:27:19,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2021-11-16 21:27:19,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:19,789 INFO L225 Difference]: With dead ends: 152 [2021-11-16 21:27:19,789 INFO L226 Difference]: Without dead ends: 87 [2021-11-16 21:27:19,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-11-16 21:27:19,790 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 50 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:19,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 362 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:27:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-16 21:27:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-16 21:27:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 61 states have internal predecessors, (67), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:27:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2021-11-16 21:27:19,795 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 56 [2021-11-16 21:27:19,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:19,795 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2021-11-16 21:27:19,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 21:27:19,795 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2021-11-16 21:27:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-16 21:27:19,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:19,796 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:19,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:20,011 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,SelfDestructingSolverStorable5 [2021-11-16 21:27:20,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:20,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:20,012 INFO L85 PathProgramCache]: Analyzing trace with hash 197656611, now seen corresponding path program 3 times [2021-11-16 21:27:20,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:20,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560145257] [2021-11-16 21:27:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:20,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:20,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:27:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:20,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:20,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:27:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:20,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:20,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:20,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:27:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:20,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:27:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:27:20,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:20,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560145257] [2021-11-16 21:27:20,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560145257] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:20,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459182846] [2021-11-16 21:27:20,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 21:27:20,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:20,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:20,252 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) [2021-11-16 21:27:20,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 21:27:20,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-16 21:27:20,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:27:20,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-16 21:27:20,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:20,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-16 21:27:20,914 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-16 21:27:20,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-11-16 21:27:20,991 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-16 21:27:20,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 55 [2021-11-16 21:27:21,156 INFO L354 Elim1Store]: treesize reduction 114, result has 19.7 percent of original size [2021-11-16 21:27:21,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 72 [2021-11-16 21:27:21,381 INFO L354 Elim1Store]: treesize reduction 176, result has 17.4 percent of original size [2021-11-16 21:27:21,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 89 [2021-11-16 21:27:23,600 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-16 21:27:23,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 101 [2021-11-16 21:27:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 11 refuted. 1 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:27:35,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:27:35,765 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 61 treesize of output 59 [2021-11-16 21:27:36,103 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 25 treesize of output 23 [2021-11-16 21:27:36,105 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 69 treesize of output 67 [2021-11-16 21:27:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-16 21:27:36,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459182846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:27:36,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:27:36,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 9] total 33 [2021-11-16 21:27:36,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327691707] [2021-11-16 21:27:36,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:27:36,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-16 21:27:36,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:36,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-16 21:27:36,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=942, Unknown=6, NotChecked=0, Total=1056 [2021-11-16 21:27:36,204 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand has 33 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 7 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-16 21:27:58,978 WARN L227 SmtUtils]: Spent 12.21s on a formula simplification. DAG size of input: 68 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:28:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:28:05,285 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2021-11-16 21:28:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-16 21:28:05,285 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 7 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2021-11-16 21:28:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:28:05,286 INFO L225 Difference]: With dead ends: 157 [2021-11-16 21:28:05,287 INFO L226 Difference]: Without dead ends: 92 [2021-11-16 21:28:05,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=203, Invalid=1765, Unknown=12, NotChecked=0, Total=1980 [2021-11-16 21:28:05,288 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 43 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:28:05,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 831 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 409 Invalid, 0 Unknown, 306 Unchecked, 0.3s Time] [2021-11-16 21:28:05,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-16 21:28:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2021-11-16 21:28:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 64 states have internal predecessors, (71), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:28:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2021-11-16 21:28:05,294 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 60 [2021-11-16 21:28:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:28:05,295 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2021-11-16 21:28:05,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 7 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-16 21:28:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2021-11-16 21:28:05,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-16 21:28:05,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:28:05,298 INFO L514 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:28:05,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-16 21:28:05,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:28:05,511 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:28:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:28:05,512 INFO L85 PathProgramCache]: Analyzing trace with hash -793086899, now seen corresponding path program 1 times [2021-11-16 21:28:05,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:28:05,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899815475] [2021-11-16 21:28:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:05,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:28:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:05,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:28:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:05,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:28:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:05,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:28:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:05,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:28:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:05,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:28:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:05,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:28:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:05,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 21:28:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-16 21:28:05,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:28:05,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899815475] [2021-11-16 21:28:05,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899815475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:28:05,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35073409] [2021-11-16 21:28:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:05,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:28:05,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:28:05,795 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) [2021-11-16 21:28:05,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 21:28:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:05,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-16 21:28:05,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:28:06,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-16 21:28:06,102 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-16 21:28:06,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-16 21:28:06,141 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-16 21:28:06,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-16 21:28:06,196 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-16 21:28:06,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-16 21:28:06,266 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-16 21:28:06,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-16 21:28:06,368 INFO L354 Elim1Store]: treesize reduction 285, result has 15.2 percent of original size [2021-11-16 21:28:06,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 81 [2021-11-16 21:28:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:28:09,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:28:09,948 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 46 treesize of output 44 [2021-11-16 21:28:09,950 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 1582 treesize of output 1578 [2021-11-16 21:28:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:28:10,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35073409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:28:10,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:28:10,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 15] total 38 [2021-11-16 21:28:10,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479095963] [2021-11-16 21:28:10,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:28:10,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-16 21:28:10,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:28:10,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-16 21:28:10,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1241, Unknown=1, NotChecked=0, Total=1406 [2021-11-16 21:28:10,155 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 36 states have internal predecessors, (79), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-16 21:28:11,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:28:11,468 INFO L93 Difference]: Finished difference Result 168 states and 202 transitions. [2021-11-16 21:28:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-16 21:28:11,468 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 36 states have internal predecessors, (79), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 64 [2021-11-16 21:28:11,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:28:11,469 INFO L225 Difference]: With dead ends: 168 [2021-11-16 21:28:11,469 INFO L226 Difference]: Without dead ends: 101 [2021-11-16 21:28:11,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=273, Invalid=2176, Unknown=1, NotChecked=0, Total=2450 [2021-11-16 21:28:11,470 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 58 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-16 21:28:11,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 503 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 946 Invalid, 0 Unknown, 159 Unchecked, 0.9s Time] [2021-11-16 21:28:11,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-16 21:28:11,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2021-11-16 21:28:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 68 states have internal predecessors, (76), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:28:11,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2021-11-16 21:28:11,477 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 64 [2021-11-16 21:28:11,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:28:11,477 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2021-11-16 21:28:11,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 36 states have internal predecessors, (79), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-16 21:28:11,478 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2021-11-16 21:28:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-16 21:28:11,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:28:11,478 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:28:11,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-16 21:28:11,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:28:11,691 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:28:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:28:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash 404647779, now seen corresponding path program 2 times [2021-11-16 21:28:11,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:28:11,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867481044] [2021-11-16 21:28:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:11,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:28:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:11,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:28:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:11,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:28:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:11,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:28:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:11,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:28:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:11,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:28:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:11,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:28:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:11,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:28:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-16 21:28:11,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:28:11,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867481044] [2021-11-16 21:28:11,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867481044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:28:11,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895892791] [2021-11-16 21:28:11,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:28:11,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:28:11,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:28:11,994 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) [2021-11-16 21:28:12,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 21:28:12,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:28:12,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:28:12,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-16 21:28:12,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:28:12,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-16 21:28:12,269 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-16 21:28:12,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-16 21:28:12,308 INFO L354 Elim1Store]: treesize reduction 72, result has 22.6 percent of original size [2021-11-16 21:28:12,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 47 [2021-11-16 21:28:12,374 INFO L354 Elim1Store]: treesize reduction 124, result has 19.5 percent of original size [2021-11-16 21:28:12,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 64 [2021-11-16 21:28:12,489 INFO L354 Elim1Store]: treesize reduction 188, result has 17.2 percent of original size [2021-11-16 21:28:12,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 81 [2021-11-16 21:28:12,804 INFO L354 Elim1Store]: treesize reduction 264, result has 15.4 percent of original size [2021-11-16 21:28:12,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 93 [2021-11-16 21:28:21,041 INFO L354 Elim1Store]: treesize reduction 352, result has 13.9 percent of original size [2021-11-16 21:28:21,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 91 treesize of output 105 [2021-11-16 21:28:27,325 INFO L354 Elim1Store]: treesize reduction 352, result has 13.9 percent of original size [2021-11-16 21:28:27,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 91 treesize of output 105 [2021-11-16 21:28:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 21:28:37,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:28:38,821 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 28 treesize of output 26 [2021-11-16 21:28:38,824 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 182 treesize of output 178 [2021-11-16 21:28:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-16 21:28:38,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895892791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:28:38,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:28:38,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 15] total 39 [2021-11-16 21:28:38,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386795996] [2021-11-16 21:28:38,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:28:38,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-16 21:28:38,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:28:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-16 21:28:38,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1351, Unknown=5, NotChecked=0, Total=1482 [2021-11-16 21:28:38,930 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 39 states, 38 states have (on average 2.263157894736842) internal successors, (86), 35 states have internal predecessors, (86), 5 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-16 21:29:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:00,277 INFO L93 Difference]: Finished difference Result 169 states and 205 transitions. [2021-11-16 21:29:00,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-16 21:29:00,277 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.263157894736842) internal successors, (86), 35 states have internal predecessors, (86), 5 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-11-16 21:29:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:00,278 INFO L225 Difference]: With dead ends: 169 [2021-11-16 21:29:00,278 INFO L226 Difference]: Without dead ends: 99 [2021-11-16 21:29:00,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 115 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=245, Invalid=2607, Unknown=10, NotChecked=0, Total=2862 [2021-11-16 21:29:00,280 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 45 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:00,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1024 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 657 Invalid, 0 Unknown, 397 Unchecked, 0.5s Time] [2021-11-16 21:29:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-16 21:29:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-11-16 21:29:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.173913043478261) internal successors, (81), 72 states have internal predecessors, (81), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:29:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2021-11-16 21:29:00,287 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 68 [2021-11-16 21:29:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:00,287 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2021-11-16 21:29:00,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.263157894736842) internal successors, (86), 35 states have internal predecessors, (86), 5 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-16 21:29:00,288 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2021-11-16 21:29:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-16 21:29:00,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:00,288 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:29:00,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:00,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:00,495 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:00,496 INFO L85 PathProgramCache]: Analyzing trace with hash 632714824, now seen corresponding path program 1 times [2021-11-16 21:29:00,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:00,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449734014] [2021-11-16 21:29:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:00,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:00,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:29:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:00,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:29:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:00,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:29:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:00,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:29:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:00,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:29:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:00,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:29:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:00,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 21:29:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:00,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-16 21:29:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:29:00,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:00,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449734014] [2021-11-16 21:29:00,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449734014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:00,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335663214] [2021-11-16 21:29:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:00,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:00,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:00,931 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) [2021-11-16 21:29:00,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 21:29:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-16 21:29:01,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-16 21:29:01,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:29:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-16 21:29:01,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335663214] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:01,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:29:01,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [20, 6] total 25 [2021-11-16 21:29:01,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126775566] [2021-11-16 21:29:01,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:29:01,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:29:01,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:01,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:29:01,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-11-16 21:29:01,373 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 21:29:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:01,401 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2021-11-16 21:29:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 21:29:01,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2021-11-16 21:29:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:01,406 INFO L225 Difference]: With dead ends: 149 [2021-11-16 21:29:01,406 INFO L226 Difference]: Without dead ends: 98 [2021-11-16 21:29:01,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-11-16 21:29:01,407 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 7 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:01,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 245 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:29:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-16 21:29:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-16 21:29:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 72 states have internal predecessors, (80), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:29:01,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2021-11-16 21:29:01,419 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 71 [2021-11-16 21:29:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:01,420 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2021-11-16 21:29:01,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 21:29:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2021-11-16 21:29:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-16 21:29:01,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:01,421 INFO L514 BasicCegarLoop]: trace histogram [9, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:29:01,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:01,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:01,626 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:01,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:01,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1510910989, now seen corresponding path program 3 times [2021-11-16 21:29:01,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:01,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937182019] [2021-11-16 21:29:01,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:01,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:01,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:29:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:01,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:29:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:01,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:29:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:01,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:29:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:01,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:29:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:01,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:29:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:01,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 21:29:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 21:29:01,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:01,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937182019] [2021-11-16 21:29:01,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937182019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:01,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209145357] [2021-11-16 21:29:01,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 21:29:01,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:01,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:01,903 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) [2021-11-16 21:29:01,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 21:29:05,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-16 21:29:05,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:29:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-16 21:29:05,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:05,420 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 14 treesize of output 12 [2021-11-16 21:29:05,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-16 21:29:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 21:29:05,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:29:06,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209145357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:06,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:29:06,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-11-16 21:29:06,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253661555] [2021-11-16 21:29:06,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:29:06,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-16 21:29:06,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:06,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-16 21:29:06,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-11-16 21:29:06,030 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 28 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-16 21:29:06,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:06,802 INFO L93 Difference]: Finished difference Result 170 states and 204 transitions. [2021-11-16 21:29:06,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-16 21:29:06,803 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 72 [2021-11-16 21:29:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:06,803 INFO L225 Difference]: With dead ends: 170 [2021-11-16 21:29:06,803 INFO L226 Difference]: Without dead ends: 99 [2021-11-16 21:29:06,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2021-11-16 21:29:06,804 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 67 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:06,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 815 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1130 Invalid, 0 Unknown, 72 Unchecked, 0.5s Time] [2021-11-16 21:29:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-16 21:29:06,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-16 21:29:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 73 states have internal predecessors, (81), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:29:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2021-11-16 21:29:06,811 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 72 [2021-11-16 21:29:06,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:06,812 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2021-11-16 21:29:06,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-16 21:29:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2021-11-16 21:29:06,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-16 21:29:06,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:06,813 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:29:06,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:07,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:07,021 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:07,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:07,021 INFO L85 PathProgramCache]: Analyzing trace with hash 946456748, now seen corresponding path program 4 times [2021-11-16 21:29:07,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:07,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909704241] [2021-11-16 21:29:07,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:07,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:07,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:29:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:07,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:29:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:07,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:29:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:07,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:29:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:07,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:29:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:07,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:29:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:07,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 21:29:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 21:29:07,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:07,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909704241] [2021-11-16 21:29:07,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909704241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:07,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026888514] [2021-11-16 21:29:07,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-16 21:29:07,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:07,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:07,341 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) [2021-11-16 21:29:07,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 21:29:07,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-16 21:29:07,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:29:07,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-16 21:29:07,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:07,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-16 21:29:07,686 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-16 21:29:07,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-16 21:29:07,753 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-16 21:29:07,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-16 21:29:07,840 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-16 21:29:07,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-16 21:29:07,933 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-16 21:29:07,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-16 21:29:08,038 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-11-16 21:29:08,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-16 21:29:08,177 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-11-16 21:29:08,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-11-16 21:29:08,337 INFO L354 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2021-11-16 21:29:08,337 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 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-11-16 21:29:08,581 INFO L354 Elim1Store]: treesize reduction 928, result has 10.2 percent of original size [2021-11-16 21:29:08,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 214 treesize of output 164 [2021-11-16 21:29:11,839 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_v_#Ultimate.C_memset_#t~loopctr680_159_92| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-16 21:29:11,840 WARN L322 ript$VariableManager]: TermVariabe |aux_div_v_#Ultimate.C_memset_#t~loopctr680_159_92| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-16 21:29:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:29:11,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:29:14,326 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 113 treesize of output 109 [2021-11-16 21:29:31,240 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 129 treesize of output 125 [2021-11-16 21:29:31,248 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-16 21:29:31,248 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 25563 treesize of output 25555 [2021-11-16 21:29:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:29:32,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026888514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:29:32,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:29:32,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 27, 22] total 59 [2021-11-16 21:29:32,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110676587] [2021-11-16 21:29:32,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:29:32,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-16 21:29:32,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-16 21:29:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3130, Unknown=8, NotChecked=0, Total=3422 [2021-11-16 21:29:32,818 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 59 states, 57 states have (on average 1.8245614035087718) internal successors, (104), 56 states have internal predecessors, (104), 7 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-16 21:29:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:43,341 INFO L93 Difference]: Finished difference Result 181 states and 218 transitions. [2021-11-16 21:29:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-16 21:29:43,342 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 1.8245614035087718) internal successors, (104), 56 states have internal predecessors, (104), 7 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 73 [2021-11-16 21:29:43,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:43,343 INFO L225 Difference]: With dead ends: 181 [2021-11-16 21:29:43,343 INFO L226 Difference]: Without dead ends: 108 [2021-11-16 21:29:43,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=445, Invalid=5396, Unknown=11, NotChecked=0, Total=5852 [2021-11-16 21:29:43,345 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 90 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1911 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 2293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:43,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 749 Invalid, 2293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1911 Invalid, 0 Unknown, 295 Unchecked, 2.3s Time] [2021-11-16 21:29:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-16 21:29:43,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2021-11-16 21:29:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 74 states have (on average 1.162162162162162) internal successors, (86), 77 states have internal predecessors, (86), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:29:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2021-11-16 21:29:43,353 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 73 [2021-11-16 21:29:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:43,353 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2021-11-16 21:29:43,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 1.8245614035087718) internal successors, (104), 56 states have internal predecessors, (104), 7 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-16 21:29:43,354 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2021-11-16 21:29:43,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-16 21:29:43,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:43,354 INFO L514 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:29:43,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:43,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-16 21:29:43,564 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:43,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:43,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1812950029, now seen corresponding path program 1 times [2021-11-16 21:29:43,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:43,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087506421] [2021-11-16 21:29:43,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:43,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:29:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:29:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:29:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:29:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:29:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:43,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:29:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 21:29:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-16 21:29:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-16 21:29:44,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:44,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087506421] [2021-11-16 21:29:44,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087506421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:44,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962681485] [2021-11-16 21:29:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:44,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:44,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:44,082 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) [2021-11-16 21:29:44,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 21:29:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:44,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-16 21:29:44,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-16 21:29:44,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:29:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-16 21:29:44,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962681485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:29:44,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:29:44,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8, 5] total 30 [2021-11-16 21:29:44,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754444674] [2021-11-16 21:29:44,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:29:44,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-16 21:29:44,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:29:44,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-16 21:29:44,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-11-16 21:29:44,583 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand has 30 states, 28 states have (on average 3.0714285714285716) internal successors, (86), 28 states have internal predecessors, (86), 5 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-16 21:29:45,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:29:45,783 INFO L93 Difference]: Finished difference Result 184 states and 220 transitions. [2021-11-16 21:29:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-16 21:29:45,784 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.0714285714285716) internal successors, (86), 28 states have internal predecessors, (86), 5 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 76 [2021-11-16 21:29:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:29:45,785 INFO L225 Difference]: With dead ends: 184 [2021-11-16 21:29:45,785 INFO L226 Difference]: Without dead ends: 104 [2021-11-16 21:29:45,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=206, Invalid=2244, Unknown=0, NotChecked=0, Total=2450 [2021-11-16 21:29:45,786 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 87 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-16 21:29:45,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 962 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-16 21:29:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-16 21:29:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-16 21:29:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 75 states have (on average 1.12) internal successors, (84), 78 states have internal predecessors, (84), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:29:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2021-11-16 21:29:45,795 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 76 [2021-11-16 21:29:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:29:45,795 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2021-11-16 21:29:45,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.0714285714285716) internal successors, (86), 28 states have internal predecessors, (86), 5 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-16 21:29:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2021-11-16 21:29:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-16 21:29:45,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:29:45,796 INFO L514 BasicCegarLoop]: trace histogram [12, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:29:45,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 21:29:46,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-16 21:29:46,011 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:29:46,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:29:46,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1822503555, now seen corresponding path program 5 times [2021-11-16 21:29:46,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:29:46,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5412516] [2021-11-16 21:29:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:29:46,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:29:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:46,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:29:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:46,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:29:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:46,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:29:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:46,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:29:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:46,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:29:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:46,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:29:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:46,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:29:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:29:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-16 21:29:46,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:29:46,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5412516] [2021-11-16 21:29:46,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5412516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:29:46,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837888793] [2021-11-16 21:29:46,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-16 21:29:46,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:29:46,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:29:46,350 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) [2021-11-16 21:29:46,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 21:29:56,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-16 21:29:56,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:29:56,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-16 21:29:56,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:29:56,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-16 21:29:56,448 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-16 21:29:56,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-16 21:29:56,511 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-16 21:29:56,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-16 21:29:56,596 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-16 21:29:56,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-16 21:29:56,684 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-16 21:29:56,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-16 21:29:56,794 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-11-16 21:29:56,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-16 21:29:56,923 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-11-16 21:29:56,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-11-16 21:29:57,093 INFO L354 Elim1Store]: treesize reduction 742, result has 11.0 percent of original size [2021-11-16 21:29:57,093 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 7 new quantified variables, introduced 28 case distinctions, treesize of input 134 treesize of output 151 [2021-11-16 21:30:02,077 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_v_#Ultimate.C_memset_#t~loopctr680_211_92| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-16 21:30:02,078 WARN L322 ript$VariableManager]: TermVariabe |aux_div_v_#Ultimate.C_memset_#t~loopctr680_211_92| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-16 21:30:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:30:02,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:30:04,759 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 58 treesize of output 56 [2021-11-16 21:30:04,763 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 6256 treesize of output 6252 [2021-11-16 21:30:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 76 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:30:05,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837888793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:30:05,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:30:05,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 23] total 59 [2021-11-16 21:30:05,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490099295] [2021-11-16 21:30:05,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:30:05,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-16 21:30:05,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:05,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-16 21:30:05,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=3070, Unknown=1, NotChecked=0, Total=3422 [2021-11-16 21:30:05,495 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand has 59 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 57 states have internal predecessors, (112), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-16 21:30:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:09,373 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2021-11-16 21:30:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-16 21:30:09,374 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 57 states have internal predecessors, (112), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 78 [2021-11-16 21:30:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:09,374 INFO L225 Difference]: With dead ends: 195 [2021-11-16 21:30:09,374 INFO L226 Difference]: Without dead ends: 119 [2021-11-16 21:30:09,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=531, Invalid=5018, Unknown=1, NotChecked=0, Total=5550 [2021-11-16 21:30:09,376 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 79 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 461 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:09,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 852 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1685 Invalid, 0 Unknown, 461 Unchecked, 2.0s Time] [2021-11-16 21:30:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-16 21:30:09,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 108. [2021-11-16 21:30:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 82 states have internal predecessors, (89), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:30:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2021-11-16 21:30:09,385 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 78 [2021-11-16 21:30:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:09,385 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2021-11-16 21:30:09,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 57 states have internal predecessors, (112), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-16 21:30:09,385 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2021-11-16 21:30:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-16 21:30:09,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:09,386 INFO L514 BasicCegarLoop]: trace histogram [13, 6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:09,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 21:30:09,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-16 21:30:09,586 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:09,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:09,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1030875053, now seen corresponding path program 6 times [2021-11-16 21:30:09,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:09,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233730384] [2021-11-16 21:30:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:09,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:09,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:30:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:09,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:09,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:30:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:09,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:30:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:09,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:30:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:09,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:30:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:09,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 21:30:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-16 21:30:09,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:09,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233730384] [2021-11-16 21:30:09,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233730384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:09,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457287807] [2021-11-16 21:30:09,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-16 21:30:09,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:09,989 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) [2021-11-16 21:30:09,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-16 21:30:19,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-16 21:30:19,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:30:19,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-16 21:30:19,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:20,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-16 21:30:20,054 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-16 21:30:20,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-16 21:30:20,099 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-16 21:30:20,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-16 21:30:20,157 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-16 21:30:20,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-16 21:30:20,230 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-16 21:30:20,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-16 21:30:20,318 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-11-16 21:30:20,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-16 21:30:20,436 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-11-16 21:30:20,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-11-16 21:30:20,575 INFO L354 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2021-11-16 21:30:20,575 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 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-11-16 21:30:20,744 INFO L354 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2021-11-16 21:30:20,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2021-11-16 21:30:20,955 INFO L354 Elim1Store]: treesize reduction 783, result has 10.4 percent of original size [2021-11-16 21:30:20,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 128 [2021-11-16 21:30:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-16 21:30:21,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:30:21,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457287807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:21,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:30:21,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 36 [2021-11-16 21:30:21,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688066011] [2021-11-16 21:30:21,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:30:21,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-16 21:30:21,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:21,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-16 21:30:21,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1246, Unknown=0, NotChecked=0, Total=1332 [2021-11-16 21:30:21,642 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 36 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-16 21:30:23,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:23,590 INFO L93 Difference]: Finished difference Result 186 states and 218 transitions. [2021-11-16 21:30:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-16 21:30:23,591 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 82 [2021-11-16 21:30:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:23,592 INFO L225 Difference]: With dead ends: 186 [2021-11-16 21:30:23,592 INFO L226 Difference]: Without dead ends: 109 [2021-11-16 21:30:23,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=2590, Unknown=0, NotChecked=0, Total=2756 [2021-11-16 21:30:23,594 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 67 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:23,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 894 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1769 Invalid, 0 Unknown, 76 Unchecked, 1.3s Time] [2021-11-16 21:30:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-16 21:30:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-16 21:30:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.125) internal successors, (90), 83 states have internal predecessors, (90), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:30:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-11-16 21:30:23,603 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 82 [2021-11-16 21:30:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:23,604 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-11-16 21:30:23,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-16 21:30:23,604 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-11-16 21:30:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-16 21:30:23,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:23,605 INFO L514 BasicCegarLoop]: trace histogram [14, 6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:23,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-16 21:30:23,805 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,SelfDestructingSolverStorable14 [2021-11-16 21:30:23,805 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:23,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1549465204, now seen corresponding path program 7 times [2021-11-16 21:30:23,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:23,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509377652] [2021-11-16 21:30:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:23,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:30:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:30:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:30:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:30:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:30:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 21:30:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-16 21:30:24,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:24,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509377652] [2021-11-16 21:30:24,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509377652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:24,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595521656] [2021-11-16 21:30:24,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-16 21:30:24,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:24,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:24,216 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) [2021-11-16 21:30:24,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-16 21:30:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-16 21:30:24,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:24,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-16 21:30:24,746 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-16 21:30:24,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-16 21:30:24,792 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-16 21:30:24,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-16 21:30:24,853 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-16 21:30:24,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-16 21:30:24,928 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-16 21:30:24,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-16 21:30:25,022 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-11-16 21:30:25,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-16 21:30:25,136 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-11-16 21:30:25,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-11-16 21:30:25,275 INFO L354 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2021-11-16 21:30:25,275 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 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-11-16 21:30:25,448 INFO L354 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2021-11-16 21:30:25,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2021-11-16 21:30:25,683 INFO L354 Elim1Store]: treesize reduction 783, result has 10.4 percent of original size [2021-11-16 21:30:25,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 128 [2021-11-16 21:30:25,959 INFO L354 Elim1Store]: treesize reduction 920, result has 9.9 percent of original size [2021-11-16 21:30:25,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 125 treesize of output 151 [2021-11-16 21:30:26,310 INFO L354 Elim1Store]: treesize reduction 1076, result has 9.3 percent of original size [2021-11-16 21:30:26,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 139 treesize of output 168 [2021-11-16 21:30:26,782 INFO L354 Elim1Store]: treesize reduction 1244, result has 8.7 percent of original size [2021-11-16 21:30:26,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 153 treesize of output 185 [2021-11-16 21:30:27,364 INFO L354 Elim1Store]: treesize reduction 1424, result has 8.2 percent of original size [2021-11-16 21:30:27,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 162 treesize of output 197 [2021-11-16 21:30:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 3 proven. 142 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:30:41,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:30:48,102 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 93 treesize of output 91 [2021-11-16 21:30:49,396 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 76 treesize of output 74 [2021-11-16 21:30:49,399 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 50928 treesize of output 50924 [2021-11-16 21:30:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 85 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-16 21:30:50,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595521656] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:30:50,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:30:50,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31, 23] total 68 [2021-11-16 21:30:50,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658262453] [2021-11-16 21:30:50,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:30:50,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-16 21:30:50,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:50,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-16 21:30:50,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=4121, Unknown=4, NotChecked=0, Total=4556 [2021-11-16 21:30:50,021 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 68 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 65 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-16 21:31:08,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:31:08,914 INFO L93 Difference]: Finished difference Result 192 states and 226 transitions. [2021-11-16 21:31:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-16 21:31:08,915 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 65 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 83 [2021-11-16 21:31:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:31:08,917 INFO L225 Difference]: With dead ends: 192 [2021-11-16 21:31:08,917 INFO L226 Difference]: Without dead ends: 113 [2021-11-16 21:31:08,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=708, Invalid=6939, Unknown=9, NotChecked=0, Total=7656 [2021-11-16 21:31:08,919 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 49 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-16 21:31:08,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 930 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1227 Invalid, 0 Unknown, 176 Unchecked, 1.4s Time] [2021-11-16 21:31:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-16 21:31:08,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-16 21:31:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.130952380952381) internal successors, (95), 87 states have internal predecessors, (95), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:31:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 132 transitions. [2021-11-16 21:31:08,932 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 132 transitions. Word has length 83 [2021-11-16 21:31:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:31:08,932 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 132 transitions. [2021-11-16 21:31:08,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 65 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-16 21:31:08,932 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 132 transitions. [2021-11-16 21:31:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-16 21:31:08,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:31:08,933 INFO L514 BasicCegarLoop]: trace histogram [15, 7, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:31:08,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-16 21:31:09,139 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,SelfDestructingSolverStorable15 [2021-11-16 21:31:09,140 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:31:09,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:31:09,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2102279202, now seen corresponding path program 8 times [2021-11-16 21:31:09,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:31:09,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745056869] [2021-11-16 21:31:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:31:09,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:31:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:09,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:31:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:09,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:31:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:09,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:31:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:09,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:31:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:09,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:31:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:09,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:31:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:09,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-16 21:31:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-16 21:31:09,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:31:09,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745056869] [2021-11-16 21:31:09,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745056869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:31:09,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920213714] [2021-11-16 21:31:09,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:31:09,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:31:09,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:31:09,577 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) [2021-11-16 21:31:09,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-16 21:31:10,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:31:10,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:31:10,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-16 21:31:10,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:31:10,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-16 21:31:10,210 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-16 21:31:10,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-16 21:31:10,258 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-16 21:31:10,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-16 21:31:10,315 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-16 21:31:10,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-16 21:31:10,388 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-16 21:31:10,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-16 21:31:10,490 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-11-16 21:31:10,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-16 21:31:10,601 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-11-16 21:31:10,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-11-16 21:31:10,745 INFO L354 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2021-11-16 21:31:10,746 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 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-11-16 21:31:10,912 INFO L354 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2021-11-16 21:31:10,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2021-11-16 21:31:11,128 INFO L354 Elim1Store]: treesize reduction 783, result has 10.4 percent of original size [2021-11-16 21:31:11,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 128 [2021-11-16 21:31:11,377 INFO L354 Elim1Store]: treesize reduction 940, result has 9.7 percent of original size [2021-11-16 21:31:11,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 141 [2021-11-16 21:31:11,689 INFO L354 Elim1Store]: treesize reduction 1111, result has 9.1 percent of original size [2021-11-16 21:31:11,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 125 treesize of output 154 [2021-11-16 21:31:12,049 INFO L354 Elim1Store]: treesize reduction 1296, result has 8.5 percent of original size [2021-11-16 21:31:12,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 135 treesize of output 167 [2021-11-16 21:31:12,504 INFO L354 Elim1Store]: treesize reduction 1495, result has 8.1 percent of original size [2021-11-16 21:31:12,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 145 treesize of output 180 [2021-11-16 21:31:13,020 INFO L354 Elim1Store]: treesize reduction 1680, result has 7.7 percent of original size [2021-11-16 21:31:13,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 160 treesize of output 198 [2021-11-16 21:31:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:31:19,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:31:27,348 WARN L227 SmtUtils]: Spent 6.53s on a formula simplification that was a NOOP. DAG size: 141 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-16 21:31:30,166 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 100 treesize of output 98 [2021-11-16 21:31:30,200 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 819152 treesize of output 819148 [2021-11-16 21:31:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 105 proven. 72 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:31:37,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920213714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:31:37,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:31:37,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29, 28] total 72 [2021-11-16 21:31:37,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925757331] [2021-11-16 21:31:37,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:31:37,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-16 21:31:37,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:31:37,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-16 21:31:37,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=4611, Unknown=1, NotChecked=0, Total=5112 [2021-11-16 21:31:37,053 INFO L87 Difference]: Start difference. First operand 113 states and 132 transitions. Second operand has 72 states, 72 states have (on average 1.8472222222222223) internal successors, (133), 70 states have internal predecessors, (133), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-16 21:31:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:31:43,286 INFO L93 Difference]: Finished difference Result 209 states and 245 transitions. [2021-11-16 21:31:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-16 21:31:43,286 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.8472222222222223) internal successors, (133), 70 states have internal predecessors, (133), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-11-16 21:31:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:31:43,287 INFO L225 Difference]: With dead ends: 209 [2021-11-16 21:31:43,287 INFO L226 Difference]: Without dead ends: 127 [2021-11-16 21:31:43,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=905, Invalid=8600, Unknown=1, NotChecked=0, Total=9506 [2021-11-16 21:31:43,289 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 77 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 2878 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 3449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-16 21:31:43,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1287 Invalid, 3449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2878 Invalid, 0 Unknown, 519 Unchecked, 3.8s Time] [2021-11-16 21:31:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-16 21:31:43,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2021-11-16 21:31:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 91 states have internal predecessors, (100), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-16 21:31:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2021-11-16 21:31:43,301 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 87 [2021-11-16 21:31:43,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:31:43,301 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2021-11-16 21:31:43,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.8472222222222223) internal successors, (133), 70 states have internal predecessors, (133), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-16 21:31:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2021-11-16 21:31:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-16 21:31:43,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:31:43,302 INFO L514 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:31:43,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-16 21:31:43,503 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,SelfDestructingSolverStorable16 [2021-11-16 21:31:43,503 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:31:43,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:31:43,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1290130391, now seen corresponding path program 2 times [2021-11-16 21:31:43,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:31:43,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806927810] [2021-11-16 21:31:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:31:43,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:31:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:43,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:31:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:43,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:31:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:43,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:31:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:43,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:31:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:43,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:31:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:43,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:31:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:44,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:31:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:44,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:31:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 17 proven. 121 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-16 21:31:44,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:31:44,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806927810] [2021-11-16 21:31:44,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806927810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:31:44,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919236604] [2021-11-16 21:31:44,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:31:44,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:31:44,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:31:44,238 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) [2021-11-16 21:31:44,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-16 21:31:44,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:31:44,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:31:44,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-16 21:31:44,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:31:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-16 21:31:44,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:31:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-16 21:31:45,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919236604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:31:45,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:31:45,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 8] total 43 [2021-11-16 21:31:45,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967125219] [2021-11-16 21:31:45,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:31:45,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-16 21:31:45,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:31:45,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-16 21:31:45,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1655, Unknown=0, NotChecked=0, Total=1806 [2021-11-16 21:31:45,206 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand has 43 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 states have internal predecessors, (112), 5 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-16 21:31:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:31:48,108 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2021-11-16 21:31:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-16 21:31:48,108 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 states have internal predecessors, (112), 5 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 90 [2021-11-16 21:31:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:31:48,110 INFO L225 Difference]: With dead ends: 191 [2021-11-16 21:31:48,110 INFO L226 Difference]: Without dead ends: 137 [2021-11-16 21:31:48,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=434, Invalid=5266, Unknown=0, NotChecked=0, Total=5700 [2021-11-16 21:31:48,111 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 159 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-16 21:31:48,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 855 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2374 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-16 21:31:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-16 21:31:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2021-11-16 21:31:48,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 103 states have internal predecessors, (110), 19 states have call successors, (19), 9 states have call predecessors, (19), 11 states have return successors, (20), 17 states have call predecessors, (20), 18 states have call successors, (20) [2021-11-16 21:31:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2021-11-16 21:31:48,131 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 90 [2021-11-16 21:31:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:31:48,131 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2021-11-16 21:31:48,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 states have internal predecessors, (112), 5 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-16 21:31:48,131 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2021-11-16 21:31:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-16 21:31:48,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:31:48,132 INFO L514 BasicCegarLoop]: trace histogram [16, 8, 7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:31:48,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-16 21:31:48,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:31:48,347 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:31:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:31:48,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2032251468, now seen corresponding path program 9 times [2021-11-16 21:31:48,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:31:48,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658488897] [2021-11-16 21:31:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:31:48,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:31:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:48,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:31:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:48,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:31:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:48,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:31:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:48,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:31:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:48,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:31:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:48,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:31:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:49,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:31:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 22 proven. 191 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:31:49,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:31:49,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658488897] [2021-11-16 21:31:49,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658488897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:31:49,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968434175] [2021-11-16 21:31:49,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 21:31:49,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:31:49,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:31:49,453 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) [2021-11-16 21:31:49,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-16 21:32:05,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-16 21:32:05,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:32:05,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-16 21:32:05,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:32:05,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:32:05,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:32:05,516 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-11-16 21:32:05,517 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 2 case distinctions, treesize of input 143 treesize of output 42 [2021-11-16 21:32:05,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2021-11-16 21:32:06,088 INFO L354 Elim1Store]: treesize reduction 272, result has 0.4 percent of original size [2021-11-16 21:32:06,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 60 [2021-11-16 21:32:06,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-16 21:32:06,184 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-16 21:32:06,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-16 21:32:06,244 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-16 21:32:06,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-11-16 21:32:06,318 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-16 21:32:06,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-16 21:32:06,403 INFO L354 Elim1Store]: treesize reduction 172, result has 16.9 percent of original size [2021-11-16 21:32:06,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 57 [2021-11-16 21:32:06,508 INFO L354 Elim1Store]: treesize reduction 253, result has 15.1 percent of original size [2021-11-16 21:32:06,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 59 treesize of output 70 [2021-11-16 21:32:06,630 INFO L354 Elim1Store]: treesize reduction 348, result has 13.6 percent of original size [2021-11-16 21:32:06,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 69 treesize of output 83 [2021-11-16 21:32:06,781 INFO L354 Elim1Store]: treesize reduction 416, result has 13.0 percent of original size [2021-11-16 21:32:06,782 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 7 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 92 [2021-11-16 21:32:06,967 INFO L354 Elim1Store]: treesize reduction 524, result has 11.9 percent of original size [2021-11-16 21:32:06,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 84 treesize of output 104 [2021-11-16 21:32:07,178 INFO L354 Elim1Store]: treesize reduction 662, result has 10.8 percent of original size [2021-11-16 21:32:07,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 117 [2021-11-16 21:32:07,435 INFO L354 Elim1Store]: treesize reduction 776, result has 10.3 percent of original size [2021-11-16 21:32:07,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 102 treesize of output 128 [2021-11-16 21:32:07,748 INFO L354 Elim1Store]: treesize reduction 942, result has 9.4 percent of original size [2021-11-16 21:32:07,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 141 [2021-11-16 21:32:08,128 INFO L354 Elim1Store]: treesize reduction 1114, result has 8.8 percent of original size [2021-11-16 21:32:08,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 122 treesize of output 154 [2021-11-16 21:32:08,596 INFO L354 Elim1Store]: treesize reduction 1244, result has 8.5 percent of original size [2021-11-16 21:32:08,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 129 treesize of output 164 [2021-11-16 21:32:09,130 INFO L354 Elim1Store]: treesize reduction 1424, result has 8.1 percent of original size [2021-11-16 21:32:09,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 138 treesize of output 176 [2021-11-16 21:32:09,732 INFO L354 Elim1Store]: treesize reduction 1616, result has 7.7 percent of original size [2021-11-16 21:32:09,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 147 treesize of output 188 [2021-11-16 21:32:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:32:12,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:32:24,344 WARN L227 SmtUtils]: Spent 9.94s on a formula simplification that was a NOOP. DAG size: 161 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-16 21:32:26,928 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 89 treesize of output 87 [2021-11-16 21:32:30,009 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 106 treesize of output 104 [2021-11-16 21:32:30,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1636336 treesize of output 1636332 [2021-11-16 21:32:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:32:42,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968434175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:32:42,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:32:42,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 39, 31] total 98 [2021-11-16 21:32:42,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521813176] [2021-11-16 21:32:42,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:32:42,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-16 21:32:42,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:32:42,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-16 21:32:42,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=8820, Unknown=0, NotChecked=0, Total=9506 [2021-11-16 21:32:42,666 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 98 states, 94 states have (on average 1.8404255319148937) internal successors, (173), 94 states have internal predecessors, (173), 10 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-16 21:32:49,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:32:49,185 INFO L93 Difference]: Finished difference Result 227 states and 261 transitions. [2021-11-16 21:32:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-16 21:32:49,185 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 94 states have (on average 1.8404255319148937) internal successors, (173), 94 states have internal predecessors, (173), 10 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 91 [2021-11-16 21:32:49,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:32:49,186 INFO L225 Difference]: With dead ends: 227 [2021-11-16 21:32:49,186 INFO L226 Difference]: Without dead ends: 169 [2021-11-16 21:32:49,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3578 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=910, Invalid=13132, Unknown=0, NotChecked=0, Total=14042 [2021-11-16 21:32:49,188 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 182 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 3429 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2421 SdHoareTripleChecker+Invalid, 4091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 544 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-16 21:32:49,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 2421 Invalid, 4091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3429 Invalid, 0 Unknown, 544 Unchecked, 4.5s Time] [2021-11-16 21:32:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-16 21:32:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-11-16 21:32:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 106 states have internal predecessors, (114), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-11-16 21:32:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2021-11-16 21:32:49,204 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 91 [2021-11-16 21:32:49,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:32:49,204 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2021-11-16 21:32:49,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 94 states have (on average 1.8404255319148937) internal successors, (173), 94 states have internal predecessors, (173), 10 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-16 21:32:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2021-11-16 21:32:49,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-16 21:32:49,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:32:49,205 INFO L514 BasicCegarLoop]: trace histogram [16, 9, 8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:32:49,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-16 21:32:49,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:32:49,415 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:32:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:32:49,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1090961667, now seen corresponding path program 10 times [2021-11-16 21:32:49,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:32:49,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340817198] [2021-11-16 21:32:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:32:49,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:32:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:49,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:32:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:49,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:32:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:49,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:32:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:49,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:32:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:49,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:32:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:49,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:32:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:49,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:32:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:32:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 16 proven. 220 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:32:50,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:32:50,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340817198] [2021-11-16 21:32:50,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340817198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:32:50,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252436152] [2021-11-16 21:32:50,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-16 21:32:50,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:32:50,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:32:50,630 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:32:50,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-16 21:32:50,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-16 21:32:50,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:32:50,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-16 21:32:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:32:50,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-16 21:32:51,013 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-16 21:32:51,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-16 21:32:51,061 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-16 21:32:51,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 33 [2021-11-16 21:32:51,121 INFO L354 Elim1Store]: treesize reduction 115, result has 19.0 percent of original size [2021-11-16 21:32:51,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2021-11-16 21:32:51,194 INFO L354 Elim1Store]: treesize reduction 184, result has 16.7 percent of original size [2021-11-16 21:32:51,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 59 [2021-11-16 21:32:51,285 INFO L354 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2021-11-16 21:32:51,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2021-11-16 21:32:51,392 INFO L354 Elim1Store]: treesize reduction 332, result has 13.8 percent of original size [2021-11-16 21:32:51,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 67 treesize of output 81 [2021-11-16 21:32:51,525 INFO L354 Elim1Store]: treesize reduction 416, result has 13.0 percent of original size [2021-11-16 21:32:51,525 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 7 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 92 [2021-11-16 21:32:51,701 INFO L354 Elim1Store]: treesize reduction 524, result has 11.9 percent of original size [2021-11-16 21:32:51,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 84 treesize of output 104 [2021-11-16 21:32:51,903 INFO L354 Elim1Store]: treesize reduction 662, result has 10.8 percent of original size [2021-11-16 21:32:51,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 117 [2021-11-16 21:32:52,134 INFO L354 Elim1Store]: treesize reduction 808, result has 10.0 percent of original size [2021-11-16 21:32:52,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 104 treesize of output 130 [2021-11-16 21:32:52,428 INFO L354 Elim1Store]: treesize reduction 920, result has 9.6 percent of original size [2021-11-16 21:32:52,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 111 treesize of output 140 [2021-11-16 21:32:52,787 INFO L354 Elim1Store]: treesize reduction 1100, result has 8.9 percent of original size [2021-11-16 21:32:52,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 121 treesize of output 153 [2021-11-16 21:32:53,232 INFO L354 Elim1Store]: treesize reduction 1244, result has 8.5 percent of original size [2021-11-16 21:32:53,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 129 treesize of output 164 [2021-11-16 21:32:53,748 INFO L354 Elim1Store]: treesize reduction 1452, result has 7.9 percent of original size [2021-11-16 21:32:53,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 139 treesize of output 177 [2021-11-16 21:32:54,356 INFO L354 Elim1Store]: treesize reduction 1616, result has 7.7 percent of original size [2021-11-16 21:32:54,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 147 treesize of output 188 [2021-11-16 21:32:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:32:58,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:33:10,726 WARN L227 SmtUtils]: Spent 9.58s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-16 21:33:12,085 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 89 treesize of output 87 [2021-11-16 21:33:14,299 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 106 treesize of output 104 [2021-11-16 21:33:14,303 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 1638376 treesize of output 1638372 [2021-11-16 21:33:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 120 proven. 116 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:33:27,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252436152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:33:27,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:33:27,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 32, 31] total 94 [2021-11-16 21:33:27,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933195920] [2021-11-16 21:33:27,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:33:27,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-16 21:33:27,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:33:27,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-16 21:33:27,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=8053, Unknown=0, NotChecked=0, Total=8742 [2021-11-16 21:33:27,100 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand has 94 states, 92 states have (on average 1.891304347826087) internal successors, (174), 91 states have internal predecessors, (174), 8 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-16 21:33:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:33:34,924 INFO L93 Difference]: Finished difference Result 208 states and 251 transitions. [2021-11-16 21:33:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-16 21:33:34,924 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 92 states have (on average 1.891304347826087) internal successors, (174), 91 states have internal predecessors, (174), 8 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 94 [2021-11-16 21:33:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:33:34,925 INFO L225 Difference]: With dead ends: 208 [2021-11-16 21:33:34,925 INFO L226 Difference]: Without dead ends: 158 [2021-11-16 21:33:34,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2940 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=832, Invalid=11824, Unknown=0, NotChecked=0, Total=12656 [2021-11-16 21:33:34,927 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 132 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 2794 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 3723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 830 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-16 21:33:34,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1544 Invalid, 3723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2794 Invalid, 0 Unknown, 830 Unchecked, 2.5s Time] [2021-11-16 21:33:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-16 21:33:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2021-11-16 21:33:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 125 states have (on average 1.192) internal successors, (149), 128 states have internal predecessors, (149), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-11-16 21:33:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 187 transitions. [2021-11-16 21:33:34,944 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 187 transitions. Word has length 94 [2021-11-16 21:33:34,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:33:34,945 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 187 transitions. [2021-11-16 21:33:34,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 92 states have (on average 1.891304347826087) internal successors, (174), 91 states have internal predecessors, (174), 8 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-16 21:33:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 187 transitions. [2021-11-16 21:33:34,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-16 21:33:34,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:33:34,946 INFO L514 BasicCegarLoop]: trace histogram [16, 10, 9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:33:34,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-16 21:33:35,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:33:35,148 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:33:35,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:33:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash 967975660, now seen corresponding path program 11 times [2021-11-16 21:33:35,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:33:35,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491388124] [2021-11-16 21:33:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:33:35,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:33:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:35,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 21:33:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:35,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:33:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:35,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:33:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:35,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:33:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:35,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:33:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:35,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 21:33:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:35,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:33:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:33:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 11 proven. 251 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 21:33:36,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:33:36,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491388124] [2021-11-16 21:33:36,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491388124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:33:36,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185964995] [2021-11-16 21:33:36,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-16 21:33:36,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:33:36,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:33:36,474 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:33:36,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process Killed by 15