./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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_hash_byte_cursor_ptr_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 ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:17:38,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:17:38,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:17:38,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:17:38,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:17:38,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:17:38,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:17:38,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:17:38,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:17:38,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:17:38,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:17:38,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:17:38,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:17:38,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:17:38,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:17:38,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:17:38,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:17:38,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:17:38,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:17:38,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:17:38,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:17:38,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:17:38,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:17:38,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:17:38,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:17:38,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:17:38,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:17:38,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:17:38,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:17:38,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:17:38,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:17:38,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:17:38,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:17:38,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:17:38,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:17:38,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:17:38,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:17:38,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:17:38,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:17:38,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:17:38,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:17:38,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:17:38,298 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:17:38,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:17:38,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:17:38,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:17:38,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:17:38,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:17:38,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:17:38,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:17:38,302 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:17:38,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:17:38,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:17:38,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:17:38,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:17:38,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:17:38,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:17:38,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:17:38,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:17:38,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:17:38,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:17:38,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:17:38,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:17:38,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:17:38,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:17:38,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:17:38,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:17:38,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:17:38,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:17:38,312 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:17:38,312 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:17:38,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:17:38,312 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 [2021-12-28 03:17:38,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:17:38,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:17:38,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:17:38,583 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:17:38,584 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:17:38,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2021-12-28 03:17:38,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98955cef4/24c7b2fe1ff94981a89d87a244e032c5/FLAG84bcced06 [2021-12-28 03:17:39,299 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:17:39,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2021-12-28 03:17:39,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98955cef4/24c7b2fe1ff94981a89d87a244e032c5/FLAG84bcced06 [2021-12-28 03:17:39,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98955cef4/24c7b2fe1ff94981a89d87a244e032c5 [2021-12-28 03:17:39,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:17:39,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:17:39,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:17:39,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:17:39,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:17:39,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:17:39" (1/1) ... [2021-12-28 03:17:39,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ed4c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:39, skipping insertion in model container [2021-12-28 03:17:39,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:17:39" (1/1) ... [2021-12-28 03:17:39,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:17:39,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:17:39,776 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_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-12-28 03:17:39,782 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_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-12-28 03:17:40,523 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:40,524 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:40,524 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:40,525 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:40,525 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:40,534 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:40,536 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:40,539 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:40,540 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:40,800 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:17:40,801 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:17:40,802 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:17:40,803 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:17:40,803 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:17:40,804 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:17:40,804 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:17:40,805 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:17:40,805 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:17:40,806 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:17:40,977 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:17:41,080 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,083 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,335 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,335 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,354 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,356 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,360 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,362 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,376 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,378 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,378 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,378 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,379 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,379 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,380 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:17:41,465 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:17:41,483 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_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-12-28 03:17:41,484 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_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-12-28 03:17:41,510 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,511 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,511 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,511 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,512 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,515 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,516 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,516 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,517 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,542 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:17:41,543 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:17:41,543 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:17:41,544 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:17:41,544 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:17:41,544 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:17:41,545 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:17:41,545 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:17:41,545 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:17:41,546 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:17:41,564 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:17:41,612 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,614 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,680 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,680 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,684 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,685 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,687 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,692 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,692 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,693 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,693 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,693 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,694 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,694 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:17:41,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:17:41,950 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:17:41,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:41 WrapperNode [2021-12-28 03:17:41,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:17:41,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:17:41,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:17:41,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:17:41,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:41" (1/1) ... [2021-12-28 03:17:42,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:41" (1/1) ... [2021-12-28 03:17:42,130 INFO L137 Inliner]: procedures = 776, calls = 3576, calls flagged for inlining = 77, calls inlined = 6, statements flattened = 787 [2021-12-28 03:17:42,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:17:42,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:17:42,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:17:42,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:17:42,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:41" (1/1) ... [2021-12-28 03:17:42,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:41" (1/1) ... [2021-12-28 03:17:42,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:41" (1/1) ... [2021-12-28 03:17:42,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:41" (1/1) ... [2021-12-28 03:17:42,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:41" (1/1) ... [2021-12-28 03:17:42,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:41" (1/1) ... [2021-12-28 03:17:42,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:41" (1/1) ... [2021-12-28 03:17:42,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:17:42,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:17:42,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:17:42,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:17:42,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:41" (1/1) ... [2021-12-28 03:17:42,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:17:42,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:17:42,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 03:17:42,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 03:17:42,292 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-28 03:17:42,293 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-28 03:17:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:17:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 03:17:42,293 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 03:17:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:17:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:17:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:17:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:17:42,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:17:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-28 03:17:42,294 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-28 03:17:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:17:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:17:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure hashlittle2 [2021-12-28 03:17:42,294 INFO L138 BoogieDeclarations]: Found implementation of procedure hashlittle2 [2021-12-28 03:17:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:17:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-28 03:17:42,295 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-28 03:17:42,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:17:42,295 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:17:42,295 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:17:42,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:17:42,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:17:42,569 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:17:42,571 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:17:43,403 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !true; [2021-12-28 03:17:43,409 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:17:43,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:17:43,414 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-28 03:17:43,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:17:43 BoogieIcfgContainer [2021-12-28 03:17:43,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:17:43,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:17:43,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:17:43,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:17:43,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:17:39" (1/3) ... [2021-12-28 03:17:43,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7463d563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:17:43, skipping insertion in model container [2021-12-28 03:17:43,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:17:41" (2/3) ... [2021-12-28 03:17:43,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7463d563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:17:43, skipping insertion in model container [2021-12-28 03:17:43,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:17:43" (3/3) ... [2021-12-28 03:17:43,421 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_byte_cursor_ptr_harness.i [2021-12-28 03:17:43,424 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:17:43,424 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:17:43,453 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:17:43,458 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 03:17:43,458 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:17:43,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-28 03:17:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-28 03:17:43,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:17:43,477 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-28 03:17:43,477 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:17:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:17:43,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1196197405, now seen corresponding path program 1 times [2021-12-28 03:17:43,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:17:43,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302898033] [2021-12-28 03:17:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:43,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:17:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:43,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:17:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:43,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:17:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:43,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:17:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:43,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 03:17:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:43,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-28 03:17:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:43,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 03:17:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:43,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:17:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:43,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-28 03:17:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-28 03:17:43,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:17:43,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302898033] [2021-12-28 03:17:43,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302898033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:17:43,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:17:43,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:17:43,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200084268] [2021-12-28 03:17:43,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:17:43,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:17:43,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:17:43,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:17:43,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:17:43,931 INFO L87 Difference]: Start difference. First operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:17:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:17:44,114 INFO L93 Difference]: Finished difference Result 263 states and 398 transitions. [2021-12-28 03:17:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:17:44,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-28 03:17:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:17:44,122 INFO L225 Difference]: With dead ends: 263 [2021-12-28 03:17:44,122 INFO L226 Difference]: Without dead ends: 128 [2021-12-28 03:17:44,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:17:44,127 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 28 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:17:44,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 273 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:17:44,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-28 03:17:44,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-28 03:17:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4907407407407407) internal successors, (161), 109 states have internal predecessors, (161), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-28 03:17:44,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 186 transitions. [2021-12-28 03:17:44,157 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 186 transitions. Word has length 62 [2021-12-28 03:17:44,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:17:44,157 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 186 transitions. [2021-12-28 03:17:44,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:17:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 186 transitions. [2021-12-28 03:17:44,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-28 03:17:44,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:17:44,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-28 03:17:44,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:17:44,161 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:17:44,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:17:44,161 INFO L85 PathProgramCache]: Analyzing trace with hash -902599839, now seen corresponding path program 1 times [2021-12-28 03:17:44,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:17:44,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200943342] [2021-12-28 03:17:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:44,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:17:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:44,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:17:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:44,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:17:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:44,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:17:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:44,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 03:17:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:44,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-28 03:17:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:44,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 03:17:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:44,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:17:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:44,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-28 03:17:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-28 03:17:44,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:17:44,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200943342] [2021-12-28 03:17:44,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200943342] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:17:44,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896216736] [2021-12-28 03:17:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:44,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:17:44,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:17:44,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:17:44,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:17:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:44,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 2556 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 03:17:44,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:17:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 03:17:44,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:17:44,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896216736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:17:44,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:17:44,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-28 03:17:44,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704140947] [2021-12-28 03:17:44,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:17:44,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:17:44,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:17:44,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:17:44,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:17:44,985 INFO L87 Difference]: Start difference. First operand 128 states and 186 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:17:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:17:45,071 INFO L93 Difference]: Finished difference Result 239 states and 354 transitions. [2021-12-28 03:17:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:17:45,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-28 03:17:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:17:45,074 INFO L225 Difference]: With dead ends: 239 [2021-12-28 03:17:45,074 INFO L226 Difference]: Without dead ends: 131 [2021-12-28 03:17:45,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:17:45,076 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 197 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:17:45,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 636 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:17:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-28 03:17:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-28 03:17:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-12-28 03:17:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2021-12-28 03:17:45,086 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 62 [2021-12-28 03:17:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:17:45,086 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2021-12-28 03:17:45,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:17:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2021-12-28 03:17:45,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 03:17:45,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:17:45,088 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-28 03:17:45,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:17:45,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:17:45,307 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:17:45,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:17:45,308 INFO L85 PathProgramCache]: Analyzing trace with hash 90546502, now seen corresponding path program 1 times [2021-12-28 03:17:45,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:17:45,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921442355] [2021-12-28 03:17:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:45,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:17:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:45,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:17:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:45,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:17:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:45,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:17:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:45,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:17:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:45,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:17:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:45,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 03:17:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:45,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 03:17:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:45,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:17:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 03:17:45,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:17:45,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921442355] [2021-12-28 03:17:45,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921442355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:17:45,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226400543] [2021-12-28 03:17:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:45,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:17:45,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:17:45,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:17:45,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:17:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:45,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:17:45,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:17:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:17:46,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:17:46,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226400543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:17:46,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:17:46,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-12-28 03:17:46,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615481492] [2021-12-28 03:17:46,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:17:46,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:17:46,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:17:46,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:17:46,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:17:46,089 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 03:17:46,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:17:46,184 INFO L93 Difference]: Finished difference Result 239 states and 350 transitions. [2021-12-28 03:17:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:17:46,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2021-12-28 03:17:46,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:17:46,185 INFO L225 Difference]: With dead ends: 239 [2021-12-28 03:17:46,185 INFO L226 Difference]: Without dead ends: 131 [2021-12-28 03:17:46,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-12-28 03:17:46,187 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 201 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:17:46,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 800 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:17:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-28 03:17:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-28 03:17:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-28 03:17:46,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 189 transitions. [2021-12-28 03:17:46,194 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 189 transitions. Word has length 64 [2021-12-28 03:17:46,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:17:46,194 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 189 transitions. [2021-12-28 03:17:46,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 03:17:46,195 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 189 transitions. [2021-12-28 03:17:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 03:17:46,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:17:46,196 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:17:46,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:17:46,414 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,SelfDestructingSolverStorable2 [2021-12-28 03:17:46,414 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:17:46,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:17:46,415 INFO L85 PathProgramCache]: Analyzing trace with hash -249804501, now seen corresponding path program 2 times [2021-12-28 03:17:46,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:17:46,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819189470] [2021-12-28 03:17:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:46,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:17:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:46,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:17:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:46,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:17:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:46,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:17:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:46,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:17:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:46,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:17:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:46,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:17:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:46,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:17:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:46,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:17:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 03:17:46,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:17:46,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819189470] [2021-12-28 03:17:46,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819189470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:17:46,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562766557] [2021-12-28 03:17:46,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:17:46,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:17:46,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:17:46,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:17:46,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:17:49,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:17:49,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:17:49,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 03:17:49,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:17:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:17:49,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:17:49,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562766557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:17:49,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:17:49,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-12-28 03:17:49,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988136983] [2021-12-28 03:17:49,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:17:49,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:17:49,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:17:49,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:17:49,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-28 03:17:49,710 INFO L87 Difference]: Start difference. First operand 131 states and 189 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 03:17:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:17:49,835 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2021-12-28 03:17:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:17:49,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 66 [2021-12-28 03:17:49,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:17:49,838 INFO L225 Difference]: With dead ends: 158 [2021-12-28 03:17:49,839 INFO L226 Difference]: Without dead ends: 128 [2021-12-28 03:17:49,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-12-28 03:17:49,843 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 203 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:17:49,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 813 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:17:49,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-28 03:17:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-28 03:17:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 109 states have internal predecessors, (160), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-28 03:17:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2021-12-28 03:17:49,861 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 66 [2021-12-28 03:17:49,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:17:49,861 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2021-12-28 03:17:49,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 03:17:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2021-12-28 03:17:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 03:17:49,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:17:49,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-28 03:17:49,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:17:50,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:17:50,083 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:17:50,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:17:50,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1967970000, now seen corresponding path program 1 times [2021-12-28 03:17:50,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:17:50,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28994473] [2021-12-28 03:17:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:50,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:17:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:50,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:17:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:50,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:17:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:50,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:17:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:50,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:17:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:50,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:17:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:50,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:17:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:50,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:17:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:50,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:17:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:17:50,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:17:50,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28994473] [2021-12-28 03:17:50,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28994473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:17:50,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244515604] [2021-12-28 03:17:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:50,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:17:50,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:17:50,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:17:50,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:17:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:50,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-28 03:17:50,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:17:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-28 03:17:51,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:17:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-28 03:17:51,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244515604] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 03:17:51,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:17:51,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 11] total 25 [2021-12-28 03:17:51,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543045064] [2021-12-28 03:17:51,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:17:51,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:17:51,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:17:51,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:17:51,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-12-28 03:17:51,335 INFO L87 Difference]: Start difference. First operand 128 states and 185 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-28 03:17:51,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:17:51,392 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2021-12-28 03:17:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:17:51,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 68 [2021-12-28 03:17:51,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:17:51,395 INFO L225 Difference]: With dead ends: 140 [2021-12-28 03:17:51,395 INFO L226 Difference]: Without dead ends: 138 [2021-12-28 03:17:51,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2021-12-28 03:17:51,396 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 17 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:17:51,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1245 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:17:51,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-28 03:17:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-12-28 03:17:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 114 states have (on average 1.456140350877193) internal successors, (166), 116 states have internal predecessors, (166), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2021-12-28 03:17:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 197 transitions. [2021-12-28 03:17:51,411 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 197 transitions. Word has length 68 [2021-12-28 03:17:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:17:51,411 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 197 transitions. [2021-12-28 03:17:51,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-28 03:17:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 197 transitions. [2021-12-28 03:17:51,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 03:17:51,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:17:51,415 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:17:51,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:17:51,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:17:51,636 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:17:51,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:17:51,636 INFO L85 PathProgramCache]: Analyzing trace with hash -278658024, now seen corresponding path program 1 times [2021-12-28 03:17:51,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:17:51,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150451705] [2021-12-28 03:17:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:51,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:17:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:51,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:17:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:51,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:17:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:51,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:17:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:51,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:17:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:51,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:17:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:51,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:17:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:51,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:17:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:51,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:17:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:17:51,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:17:51,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150451705] [2021-12-28 03:17:51,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150451705] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:17:51,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175168463] [2021-12-28 03:17:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:51,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:17:51,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:17:51,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:17:51,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:17:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:52,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-28 03:17:52,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:17:52,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:17:53,101 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:17:53,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 37 [2021-12-28 03:17:53,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:17:53,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:17:53,368 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-28 03:17:53,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 78 [2021-12-28 03:17:53,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-28 03:17:53,402 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-28 03:17:53,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 03:17:53,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-28 03:17:53,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 47 [2021-12-28 03:17:53,572 INFO L387 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 9 treesize of output 7 [2021-12-28 03:17:53,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-12-28 03:17:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:17:53,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:17:54,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175168463] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:17:54,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:17:54,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-12-28 03:17:54,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428089] [2021-12-28 03:17:54,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:17:54,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-28 03:17:54,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:17:54,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-28 03:17:54,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1007, Unknown=4, NotChecked=0, Total=1122 [2021-12-28 03:17:54,180 INFO L87 Difference]: Start difference. First operand 137 states and 197 transitions. Second operand has 29 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 24 states have internal predecessors, (92), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-28 03:17:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:17:55,527 INFO L93 Difference]: Finished difference Result 304 states and 440 transitions. [2021-12-28 03:17:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-28 03:17:55,527 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 24 states have internal predecessors, (92), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 72 [2021-12-28 03:17:55,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:17:55,529 INFO L225 Difference]: With dead ends: 304 [2021-12-28 03:17:55,529 INFO L226 Difference]: Without dead ends: 269 [2021-12-28 03:17:55,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=319, Invalid=3209, Unknown=12, NotChecked=0, Total=3540 [2021-12-28 03:17:55,531 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 212 mSDsluCounter, 2571 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 3329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2240 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:17:55,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 2787 Invalid, 3329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1041 Invalid, 0 Unknown, 2240 Unchecked, 0.6s Time] [2021-12-28 03:17:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-28 03:17:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 246. [2021-12-28 03:17:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 206 states have (on average 1.4271844660194175) internal successors, (294), 211 states have internal predecessors, (294), 24 states have call successors, (24), 12 states have call predecessors, (24), 15 states have return successors, (36), 22 states have call predecessors, (36), 23 states have call successors, (36) [2021-12-28 03:17:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 354 transitions. [2021-12-28 03:17:55,543 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 354 transitions. Word has length 72 [2021-12-28 03:17:55,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:17:55,543 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 354 transitions. [2021-12-28 03:17:55,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 24 states have internal predecessors, (92), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-28 03:17:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 354 transitions. [2021-12-28 03:17:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 03:17:55,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:17:55,544 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:17:55,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:17:55,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:17:55,765 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:17:55,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:17:55,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1208498679, now seen corresponding path program 1 times [2021-12-28 03:17:55,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:17:55,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093889233] [2021-12-28 03:17:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:55,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:17:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:55,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:17:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:55,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:17:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:55,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:17:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:55,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:17:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:55,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:17:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:55,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:17:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:55,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:17:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:56,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:17:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:17:56,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:17:56,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093889233] [2021-12-28 03:17:56,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093889233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:17:56,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816272312] [2021-12-28 03:17:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:56,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:17:56,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:17:56,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:17:56,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:17:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:56,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-28 03:17:56,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:17:56,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:17:57,013 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:17:57,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 37 [2021-12-28 03:17:57,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:17:57,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:17:57,367 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-28 03:17:57,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2021-12-28 03:17:57,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-28 03:17:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:17:57,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:17:57,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816272312] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:17:57,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:17:57,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-28 03:17:57,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072510953] [2021-12-28 03:17:57,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:17:57,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 03:17:57,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:17:57,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 03:17:57,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-28 03:17:57,676 INFO L87 Difference]: Start difference. First operand 246 states and 354 transitions. Second operand has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:17:58,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:17:58,593 INFO L93 Difference]: Finished difference Result 303 states and 436 transitions. [2021-12-28 03:17:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-28 03:17:58,598 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 73 [2021-12-28 03:17:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:17:58,599 INFO L225 Difference]: With dead ends: 303 [2021-12-28 03:17:58,600 INFO L226 Difference]: Without dead ends: 268 [2021-12-28 03:17:58,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=240, Invalid=2111, Unknown=1, NotChecked=0, Total=2352 [2021-12-28 03:17:58,604 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 58 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 669 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:17:58,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1888 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 703 Invalid, 0 Unknown, 669 Unchecked, 0.5s Time] [2021-12-28 03:17:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-28 03:17:58,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 247. [2021-12-28 03:17:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 207 states have (on average 1.429951690821256) internal successors, (296), 212 states have internal predecessors, (296), 24 states have call successors, (24), 12 states have call predecessors, (24), 15 states have return successors, (36), 22 states have call predecessors, (36), 23 states have call successors, (36) [2021-12-28 03:17:58,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 356 transitions. [2021-12-28 03:17:58,615 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 356 transitions. Word has length 73 [2021-12-28 03:17:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:17:58,615 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 356 transitions. [2021-12-28 03:17:58,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:17:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 356 transitions. [2021-12-28 03:17:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 03:17:58,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:17:58,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:17:58,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:17:58,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:17:58,836 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:17:58,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:17:58,836 INFO L85 PathProgramCache]: Analyzing trace with hash -994417807, now seen corresponding path program 1 times [2021-12-28 03:17:58,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:17:58,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304992689] [2021-12-28 03:17:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:58,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:17:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:58,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:17:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:58,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:17:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:59,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:17:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:59,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:17:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:59,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:17:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:59,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:17:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:59,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:17:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:59,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:17:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:17:59,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:17:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304992689] [2021-12-28 03:17:59,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304992689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:17:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726136557] [2021-12-28 03:17:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:17:59,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:17:59,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:17:59,168 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:17:59,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:17:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:17:59,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 2590 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-28 03:17:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:17:59,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-28 03:17:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:17:59,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:18:00,238 INFO L353 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-28 03:18:00,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-28 03:18:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:18:00,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726136557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:18:00,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:18:00,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 27 [2021-12-28 03:18:00,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525644249] [2021-12-28 03:18:00,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:18:00,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-28 03:18:00,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:00,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-28 03:18:00,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-12-28 03:18:00,262 INFO L87 Difference]: Start difference. First operand 247 states and 356 transitions. Second operand has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-28 03:18:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:18:02,348 INFO L93 Difference]: Finished difference Result 462 states and 678 transitions. [2021-12-28 03:18:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-28 03:18:02,349 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) Word has length 73 [2021-12-28 03:18:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:18:02,351 INFO L225 Difference]: With dead ends: 462 [2021-12-28 03:18:02,351 INFO L226 Difference]: Without dead ends: 422 [2021-12-28 03:18:02,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=2001, Unknown=0, NotChecked=0, Total=2256 [2021-12-28 03:18:02,352 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 734 mSDsluCounter, 2125 mSDsCounter, 0 mSdLazyCounter, 3376 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 2329 SdHoareTripleChecker+Invalid, 3974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 544 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:18:02,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 2329 Invalid, 3974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3376 Invalid, 0 Unknown, 544 Unchecked, 1.5s Time] [2021-12-28 03:18:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-28 03:18:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 331. [2021-12-28 03:18:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 287 states have (on average 1.4634146341463414) internal successors, (420), 293 states have internal predecessors, (420), 25 states have call successors, (25), 14 states have call predecessors, (25), 18 states have return successors, (37), 23 states have call predecessors, (37), 24 states have call successors, (37) [2021-12-28 03:18:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 482 transitions. [2021-12-28 03:18:02,373 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 482 transitions. Word has length 73 [2021-12-28 03:18:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:18:02,374 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 482 transitions. [2021-12-28 03:18:02,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-28 03:18:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 482 transitions. [2021-12-28 03:18:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 03:18:02,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:18:02,380 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:18:02,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:18:02,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:02,603 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:18:02,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:18:02,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1569134765, now seen corresponding path program 1 times [2021-12-28 03:18:02,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:18:02,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864071669] [2021-12-28 03:18:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:02,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:18:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:02,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:18:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:02,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:18:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:02,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:18:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:02,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:18:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:02,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:18:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:02,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:18:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:02,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:18:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:02,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-28 03:18:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:18:02,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:18:02,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864071669] [2021-12-28 03:18:02,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864071669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:02,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69482829] [2021-12-28 03:18:02,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:02,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:02,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:18:02,892 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) [2021-12-28 03:18:02,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:18:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-28 03:18:03,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:18:03,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:18:03,872 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:18:03,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 37 [2021-12-28 03:18:04,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:04,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:04,270 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-12-28 03:18:04,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 70 [2021-12-28 03:18:04,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-28 03:18:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:18:04,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:18:04,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69482829] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:04,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:18:04,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-28 03:18:04,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455243635] [2021-12-28 03:18:04,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:18:04,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 03:18:04,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:04,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 03:18:04,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-28 03:18:04,605 INFO L87 Difference]: Start difference. First operand 331 states and 482 transitions. Second operand has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:18:05,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:18:05,297 INFO L93 Difference]: Finished difference Result 375 states and 538 transitions. [2021-12-28 03:18:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-28 03:18:05,298 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 74 [2021-12-28 03:18:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:18:05,300 INFO L225 Difference]: With dead ends: 375 [2021-12-28 03:18:05,300 INFO L226 Difference]: Without dead ends: 340 [2021-12-28 03:18:05,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=217, Invalid=1852, Unknown=1, NotChecked=0, Total=2070 [2021-12-28 03:18:05,302 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 83 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:18:05,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1484 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 486 Invalid, 0 Unknown, 310 Unchecked, 0.3s Time] [2021-12-28 03:18:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-28 03:18:05,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 331. [2021-12-28 03:18:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 287 states have (on average 1.4634146341463414) internal successors, (420), 293 states have internal predecessors, (420), 25 states have call successors, (25), 14 states have call predecessors, (25), 18 states have return successors, (37), 23 states have call predecessors, (37), 24 states have call successors, (37) [2021-12-28 03:18:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 482 transitions. [2021-12-28 03:18:05,315 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 482 transitions. Word has length 74 [2021-12-28 03:18:05,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:18:05,315 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 482 transitions. [2021-12-28 03:18:05,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:18:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 482 transitions. [2021-12-28 03:18:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 03:18:05,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:18:05,317 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:18:05,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 03:18:05,533 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,SelfDestructingSolverStorable8 [2021-12-28 03:18:05,534 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:18:05,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:18:05,534 INFO L85 PathProgramCache]: Analyzing trace with hash -7761607, now seen corresponding path program 1 times [2021-12-28 03:18:05,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:18:05,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086159041] [2021-12-28 03:18:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:05,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:18:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:05,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:18:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:05,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:18:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:05,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:18:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:05,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:18:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:05,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:18:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:05,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:18:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:05,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:18:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:05,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-28 03:18:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:18:05,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:18:05,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086159041] [2021-12-28 03:18:05,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086159041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:05,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174264994] [2021-12-28 03:18:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:05,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:05,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:18:05,828 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) [2021-12-28 03:18:05,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 03:18:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:06,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 2593 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-28 03:18:06,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:18:06,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:18:06,908 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:18:06,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 37 [2021-12-28 03:18:07,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:07,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:07,292 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-28 03:18:07,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2021-12-28 03:18:07,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-28 03:18:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:18:07,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:18:07,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174264994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:07,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:18:07,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-28 03:18:07,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924639243] [2021-12-28 03:18:07,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:18:07,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 03:18:07,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:07,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 03:18:07,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-28 03:18:07,604 INFO L87 Difference]: Start difference. First operand 331 states and 482 transitions. Second operand has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:18:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:18:08,454 INFO L93 Difference]: Finished difference Result 411 states and 584 transitions. [2021-12-28 03:18:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-28 03:18:08,461 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 74 [2021-12-28 03:18:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:18:08,463 INFO L225 Difference]: With dead ends: 411 [2021-12-28 03:18:08,463 INFO L226 Difference]: Without dead ends: 368 [2021-12-28 03:18:08,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=1775, Unknown=1, NotChecked=0, Total=1980 [2021-12-28 03:18:08,464 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 80 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 494 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:18:08,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1531 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 821 Invalid, 0 Unknown, 494 Unchecked, 0.5s Time] [2021-12-28 03:18:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-28 03:18:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 336. [2021-12-28 03:18:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 290 states have (on average 1.4586206896551723) internal successors, (423), 296 states have internal predecessors, (423), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (38), 24 states have call predecessors, (38), 25 states have call successors, (38) [2021-12-28 03:18:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 487 transitions. [2021-12-28 03:18:08,488 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 487 transitions. Word has length 74 [2021-12-28 03:18:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:18:08,489 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 487 transitions. [2021-12-28 03:18:08,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:18:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 487 transitions. [2021-12-28 03:18:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-28 03:18:08,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:18:08,490 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:18:08,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 03:18:08,703 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,SelfDestructingSolverStorable9 [2021-12-28 03:18:08,703 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:18:08,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:18:08,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1464298396, now seen corresponding path program 1 times [2021-12-28 03:18:08,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:18:08,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341167867] [2021-12-28 03:18:08,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:08,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:18:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:08,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:18:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:08,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:18:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:08,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:18:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:08,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:18:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:08,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:18:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:08,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:18:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:08,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:18:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:08,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:18:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:18:08,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:18:08,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341167867] [2021-12-28 03:18:08,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341167867] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:08,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492365070] [2021-12-28 03:18:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:08,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:08,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:18:08,967 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) [2021-12-28 03:18:08,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 03:18:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:09,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-28 03:18:09,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:18:09,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:18:09,943 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:18:09,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 37 [2021-12-28 03:18:10,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:10,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:10,300 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-12-28 03:18:10,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 70 [2021-12-28 03:18:10,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-28 03:18:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:18:10,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:18:10,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492365070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:10,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:18:10,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-28 03:18:10,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944743329] [2021-12-28 03:18:10,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:18:10,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 03:18:10,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:10,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 03:18:10,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-28 03:18:10,614 INFO L87 Difference]: Start difference. First operand 336 states and 487 transitions. Second operand has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:18:11,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:18:11,363 INFO L93 Difference]: Finished difference Result 381 states and 543 transitions. [2021-12-28 03:18:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-28 03:18:11,363 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 75 [2021-12-28 03:18:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:18:11,365 INFO L225 Difference]: With dead ends: 381 [2021-12-28 03:18:11,365 INFO L226 Difference]: Without dead ends: 346 [2021-12-28 03:18:11,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 81 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=1774, Unknown=1, NotChecked=0, Total=1980 [2021-12-28 03:18:11,366 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 63 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:18:11,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1385 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 683 Invalid, 0 Unknown, 202 Unchecked, 0.4s Time] [2021-12-28 03:18:11,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-28 03:18:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 336. [2021-12-28 03:18:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 290 states have (on average 1.4586206896551723) internal successors, (423), 296 states have internal predecessors, (423), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (38), 24 states have call predecessors, (38), 25 states have call successors, (38) [2021-12-28 03:18:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 487 transitions. [2021-12-28 03:18:11,379 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 487 transitions. Word has length 75 [2021-12-28 03:18:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:18:11,379 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 487 transitions. [2021-12-28 03:18:11,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:18:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 487 transitions. [2021-12-28 03:18:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 03:18:11,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:18:11,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:18:11,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 03:18:11,595 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,SelfDestructingSolverStorable10 [2021-12-28 03:18:11,595 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:18:11,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:18:11,596 INFO L85 PathProgramCache]: Analyzing trace with hash 185282190, now seen corresponding path program 1 times [2021-12-28 03:18:11,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:18:11,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605596274] [2021-12-28 03:18:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:11,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:18:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:11,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:18:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:11,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:18:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:11,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:18:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:11,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:18:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:11,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:18:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:11,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:18:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:11,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:18:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:11,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 03:18:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:18:11,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:18:11,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605596274] [2021-12-28 03:18:11,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605596274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:11,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940390864] [2021-12-28 03:18:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:11,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:11,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:18:11,846 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) [2021-12-28 03:18:11,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 03:18:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-28 03:18:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:18:12,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:18:12,785 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:18:12,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 37 [2021-12-28 03:18:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:13,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:13,046 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-28 03:18:13,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 78 [2021-12-28 03:18:13,063 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-28 03:18:13,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 03:18:13,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-28 03:18:13,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-28 03:18:13,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-12-28 03:18:13,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-12-28 03:18:13,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 7 [2021-12-28 03:18:13,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-12-28 03:18:13,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-28 03:18:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:18:13,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:18:13,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940390864] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:13,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:18:13,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-12-28 03:18:13,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419786770] [2021-12-28 03:18:13,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:18:13,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-28 03:18:13,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:13,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-28 03:18:13,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1006, Unknown=5, NotChecked=0, Total=1122 [2021-12-28 03:18:13,854 INFO L87 Difference]: Start difference. First operand 336 states and 487 transitions. Second operand has 29 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 24 states have internal predecessors, (100), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-28 03:18:14,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:18:14,996 INFO L93 Difference]: Finished difference Result 414 states and 592 transitions. [2021-12-28 03:18:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-28 03:18:14,997 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 24 states have internal predecessors, (100), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 76 [2021-12-28 03:18:14,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:18:14,999 INFO L225 Difference]: With dead ends: 414 [2021-12-28 03:18:14,999 INFO L226 Difference]: Without dead ends: 369 [2021-12-28 03:18:15,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=303, Invalid=3107, Unknown=12, NotChecked=0, Total=3422 [2021-12-28 03:18:15,002 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 243 mSDsluCounter, 2732 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 2950 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2476 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:18:15,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 2950 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 950 Invalid, 0 Unknown, 2476 Unchecked, 0.5s Time] [2021-12-28 03:18:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-28 03:18:15,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 331. [2021-12-28 03:18:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 286 states have (on average 1.4615384615384615) internal successors, (418), 291 states have internal predecessors, (418), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (35), 24 states have call predecessors, (35), 25 states have call successors, (35) [2021-12-28 03:18:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 479 transitions. [2021-12-28 03:18:15,019 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 479 transitions. Word has length 76 [2021-12-28 03:18:15,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:18:15,019 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 479 transitions. [2021-12-28 03:18:15,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 24 states have internal predecessors, (100), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-28 03:18:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 479 transitions. [2021-12-28 03:18:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 03:18:15,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:18:15,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:18:15,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 03:18:15,239 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,SelfDestructingSolverStorable11 [2021-12-28 03:18:15,239 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:18:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:18:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1817674049, now seen corresponding path program 1 times [2021-12-28 03:18:15,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:18:15,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083745355] [2021-12-28 03:18:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:15,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:18:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:15,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:18:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:15,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:18:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:15,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:18:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:15,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:18:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:15,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:18:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:15,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:18:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:15,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:18:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:15,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 03:18:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:18:15,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:18:15,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083745355] [2021-12-28 03:18:15,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083745355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:15,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160069921] [2021-12-28 03:18:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:15,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:15,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:18:15,485 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) [2021-12-28 03:18:15,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 03:18:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:15,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-28 03:18:15,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:18:15,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:18:16,401 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:18:16,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 37 [2021-12-28 03:18:16,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:16,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:16,786 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-12-28 03:18:16,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 70 [2021-12-28 03:18:16,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-28 03:18:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:18:16,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:18:17,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160069921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:17,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:18:17,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-28 03:18:17,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250923151] [2021-12-28 03:18:17,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:18:17,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 03:18:17,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:17,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 03:18:17,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-28 03:18:17,077 INFO L87 Difference]: Start difference. First operand 331 states and 479 transitions. Second operand has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:18:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:18:17,898 INFO L93 Difference]: Finished difference Result 391 states and 565 transitions. [2021-12-28 03:18:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-28 03:18:17,899 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2021-12-28 03:18:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:18:17,900 INFO L225 Difference]: With dead ends: 391 [2021-12-28 03:18:17,900 INFO L226 Difference]: Without dead ends: 356 [2021-12-28 03:18:17,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=257, Invalid=2192, Unknown=1, NotChecked=0, Total=2450 [2021-12-28 03:18:17,905 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 91 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:18:17,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1492 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 721 Invalid, 0 Unknown, 460 Unchecked, 0.4s Time] [2021-12-28 03:18:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-28 03:18:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 331. [2021-12-28 03:18:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 286 states have (on average 1.4615384615384615) internal successors, (418), 291 states have internal predecessors, (418), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (35), 24 states have call predecessors, (35), 25 states have call successors, (35) [2021-12-28 03:18:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 479 transitions. [2021-12-28 03:18:17,928 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 479 transitions. Word has length 77 [2021-12-28 03:18:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:18:17,928 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 479 transitions. [2021-12-28 03:18:17,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:18:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 479 transitions. [2021-12-28 03:18:17,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 03:18:17,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:18:17,931 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:18:17,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 03:18:18,152 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,SelfDestructingSolverStorable12 [2021-12-28 03:18:18,153 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:18:18,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:18:18,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1265263437, now seen corresponding path program 1 times [2021-12-28 03:18:18,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:18:18,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731771425] [2021-12-28 03:18:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:18,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:18:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:18,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:18:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:18,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:18:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:18,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:18:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:18,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:18:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:18,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:18:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:18,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:18:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:18,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:18:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:18,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 03:18:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:18:18,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:18:18,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731771425] [2021-12-28 03:18:18,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731771425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:18,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120293108] [2021-12-28 03:18:18,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:18,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:18,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:18:18,406 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) [2021-12-28 03:18:18,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 03:18:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:18,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-28 03:18:18,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:18:18,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:18:19,257 INFO L353 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-12-28 03:18:19,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 30 [2021-12-28 03:18:19,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:19,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:19,621 INFO L353 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-12-28 03:18:19,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 28 [2021-12-28 03:18:19,625 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 03:18:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:18:19,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:18:19,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120293108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:18:19,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:18:19,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [13] total 27 [2021-12-28 03:18:19,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676238875] [2021-12-28 03:18:19,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:18:19,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 03:18:19,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:19,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 03:18:19,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=624, Unknown=1, NotChecked=0, Total=702 [2021-12-28 03:18:19,645 INFO L87 Difference]: Start difference. First operand 331 states and 479 transitions. Second operand has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-28 03:18:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:18:19,821 INFO L93 Difference]: Finished difference Result 416 states and 596 transitions. [2021-12-28 03:18:19,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 03:18:19,822 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 77 [2021-12-28 03:18:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:18:19,823 INFO L225 Difference]: With dead ends: 416 [2021-12-28 03:18:19,823 INFO L226 Difference]: Without dead ends: 376 [2021-12-28 03:18:19,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=830, Unknown=1, NotChecked=0, Total=930 [2021-12-28 03:18:19,825 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 62 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 823 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:18:19,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 794 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 81 Invalid, 0 Unknown, 823 Unchecked, 0.1s Time] [2021-12-28 03:18:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-12-28 03:18:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 358. [2021-12-28 03:18:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 311 states have (on average 1.4662379421221865) internal successors, (456), 317 states have internal predecessors, (456), 26 states have call successors, (26), 16 states have call predecessors, (26), 20 states have return successors, (37), 24 states have call predecessors, (37), 25 states have call successors, (37) [2021-12-28 03:18:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 519 transitions. [2021-12-28 03:18:19,837 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 519 transitions. Word has length 77 [2021-12-28 03:18:19,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:18:19,838 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 519 transitions. [2021-12-28 03:18:19,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 5 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-28 03:18:19,838 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 519 transitions. [2021-12-28 03:18:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 03:18:19,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:18:19,840 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:18:19,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-28 03:18:20,050 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,SelfDestructingSolverStorable13 [2021-12-28 03:18:20,050 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:18:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:18:20,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1399276943, now seen corresponding path program 1 times [2021-12-28 03:18:20,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:18:20,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221079018] [2021-12-28 03:18:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:20,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:18:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:20,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:18:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:20,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:18:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:20,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:18:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:20,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:18:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:20,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:18:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:20,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:18:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:20,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:18:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:20,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 03:18:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:18:20,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:18:20,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221079018] [2021-12-28 03:18:20,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221079018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:20,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130261851] [2021-12-28 03:18:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:20,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:20,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:18:20,287 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) [2021-12-28 03:18:20,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 03:18:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:20,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 2597 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-28 03:18:20,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:18:20,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:18:21,248 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:18:21,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 37 [2021-12-28 03:18:21,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:21,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:21,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:21,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 28 [2021-12-28 03:18:21,549 INFO L353 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-28 03:18:21,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-28 03:18:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:18:21,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:18:22,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130261851] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:22,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:18:22,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 30 [2021-12-28 03:18:22,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433322065] [2021-12-28 03:18:22,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:18:22,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-28 03:18:22,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:22,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-28 03:18:22,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1069, Unknown=6, NotChecked=0, Total=1190 [2021-12-28 03:18:22,035 INFO L87 Difference]: Start difference. First operand 358 states and 519 transitions. Second operand has 30 states, 28 states have (on average 3.642857142857143) internal successors, (102), 25 states have internal predecessors, (102), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-28 03:18:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:18:23,127 INFO L93 Difference]: Finished difference Result 443 states and 636 transitions. [2021-12-28 03:18:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-28 03:18:23,128 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.642857142857143) internal successors, (102), 25 states have internal predecessors, (102), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 77 [2021-12-28 03:18:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:18:23,129 INFO L225 Difference]: With dead ends: 443 [2021-12-28 03:18:23,129 INFO L226 Difference]: Without dead ends: 403 [2021-12-28 03:18:23,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=3096, Unknown=14, NotChecked=0, Total=3422 [2021-12-28 03:18:23,131 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 70 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:18:23,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 2048 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 904 Invalid, 0 Unknown, 1166 Unchecked, 0.5s Time] [2021-12-28 03:18:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-28 03:18:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 358. [2021-12-28 03:18:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 311 states have (on average 1.4662379421221865) internal successors, (456), 317 states have internal predecessors, (456), 26 states have call successors, (26), 16 states have call predecessors, (26), 20 states have return successors, (37), 24 states have call predecessors, (37), 25 states have call successors, (37) [2021-12-28 03:18:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 519 transitions. [2021-12-28 03:18:23,145 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 519 transitions. Word has length 77 [2021-12-28 03:18:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:18:23,145 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 519 transitions. [2021-12-28 03:18:23,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.642857142857143) internal successors, (102), 25 states have internal predecessors, (102), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-28 03:18:23,146 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 519 transitions. [2021-12-28 03:18:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-28 03:18:23,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:18:23,147 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:18:23,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-28 03:18:23,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:23,363 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:18:23,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:18:23,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1085154871, now seen corresponding path program 1 times [2021-12-28 03:18:23,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:18:23,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589586990] [2021-12-28 03:18:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:23,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:18:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:23,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:18:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:23,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:18:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:23,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:18:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:23,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:18:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:23,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:18:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:23,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:18:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:23,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:18:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:23,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 03:18:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:18:23,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:18:23,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589586990] [2021-12-28 03:18:23,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589586990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:23,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171965445] [2021-12-28 03:18:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:23,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:23,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:18:23,619 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) [2021-12-28 03:18:23,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-28 03:18:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:24,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 2591 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-28 03:18:24,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:18:24,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:18:24,579 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:18:24,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 37 [2021-12-28 03:18:24,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:24,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:24,959 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-28 03:18:24,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2021-12-28 03:18:24,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-28 03:18:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:18:24,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:18:25,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171965445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:25,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:18:25,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-28 03:18:25,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407442079] [2021-12-28 03:18:25,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:18:25,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 03:18:25,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:25,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 03:18:25,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-28 03:18:25,266 INFO L87 Difference]: Start difference. First operand 358 states and 519 transitions. Second operand has 26 states, 24 states have (on average 4.291666666666667) internal successors, (103), 22 states have internal predecessors, (103), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:18:26,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:18:26,030 INFO L93 Difference]: Finished difference Result 407 states and 580 transitions. [2021-12-28 03:18:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-28 03:18:26,036 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.291666666666667) internal successors, (103), 22 states have internal predecessors, (103), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 78 [2021-12-28 03:18:26,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:18:26,037 INFO L225 Difference]: With dead ends: 407 [2021-12-28 03:18:26,037 INFO L226 Difference]: Without dead ends: 372 [2021-12-28 03:18:26,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=234, Invalid=1927, Unknown=1, NotChecked=0, Total=2162 [2021-12-28 03:18:26,039 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 84 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:18:26,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1318 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 656 Invalid, 0 Unknown, 375 Unchecked, 0.4s Time] [2021-12-28 03:18:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-12-28 03:18:26,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 358. [2021-12-28 03:18:26,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 311 states have (on average 1.4662379421221865) internal successors, (456), 317 states have internal predecessors, (456), 26 states have call successors, (26), 16 states have call predecessors, (26), 20 states have return successors, (37), 24 states have call predecessors, (37), 25 states have call successors, (37) [2021-12-28 03:18:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 519 transitions. [2021-12-28 03:18:26,052 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 519 transitions. Word has length 78 [2021-12-28 03:18:26,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:18:26,052 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 519 transitions. [2021-12-28 03:18:26,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.291666666666667) internal successors, (103), 22 states have internal predecessors, (103), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:18:26,052 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 519 transitions. [2021-12-28 03:18:26,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-28 03:18:26,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:18:26,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:18:26,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-28 03:18:26,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-28 03:18:26,254 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:18:26,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:18:26,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1452243686, now seen corresponding path program 1 times [2021-12-28 03:18:26,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:18:26,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029248171] [2021-12-28 03:18:26,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:26,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:18:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:26,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:18:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:26,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:18:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:26,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:18:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:26,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:18:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:26,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:18:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:26,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:18:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:26,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:18:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:26,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:18:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:18:26,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:18:26,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029248171] [2021-12-28 03:18:26,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029248171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:26,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565215684] [2021-12-28 03:18:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:26,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:26,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:18:26,481 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) [2021-12-28 03:18:26,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-28 03:18:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:26,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 2593 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-28 03:18:26,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:18:26,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:18:27,443 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:18:27,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 37 [2021-12-28 03:18:27,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:27,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:27,729 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-28 03:18:27,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 78 [2021-12-28 03:18:27,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-28 03:18:27,748 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-28 03:18:27,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 03:18:27,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-28 03:18:27,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-12-28 03:18:28,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-28 03:18:28,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-12-28 03:18:28,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-28 03:18:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:18:28,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:18:28,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565215684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:28,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:18:28,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-12-28 03:18:28,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877933129] [2021-12-28 03:18:28,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:18:28,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-28 03:18:28,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:28,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-28 03:18:28,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1006, Unknown=5, NotChecked=0, Total=1122 [2021-12-28 03:18:28,547 INFO L87 Difference]: Start difference. First operand 358 states and 519 transitions. Second operand has 29 states, 27 states have (on average 3.925925925925926) internal successors, (106), 24 states have internal predecessors, (106), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-28 03:18:29,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:18:29,364 INFO L93 Difference]: Finished difference Result 412 states and 585 transitions. [2021-12-28 03:18:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-28 03:18:29,365 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.925925925925926) internal successors, (106), 24 states have internal predecessors, (106), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 79 [2021-12-28 03:18:29,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:18:29,367 INFO L225 Difference]: With dead ends: 412 [2021-12-28 03:18:29,367 INFO L226 Difference]: Without dead ends: 377 [2021-12-28 03:18:29,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=256, Invalid=2488, Unknown=12, NotChecked=0, Total=2756 [2021-12-28 03:18:29,368 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 76 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 967 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:18:29,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1969 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 491 Invalid, 0 Unknown, 967 Unchecked, 0.3s Time] [2021-12-28 03:18:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-28 03:18:29,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 358. [2021-12-28 03:18:29,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 311 states have (on average 1.4662379421221865) internal successors, (456), 317 states have internal predecessors, (456), 26 states have call successors, (26), 16 states have call predecessors, (26), 20 states have return successors, (37), 24 states have call predecessors, (37), 25 states have call successors, (37) [2021-12-28 03:18:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 519 transitions. [2021-12-28 03:18:29,382 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 519 transitions. Word has length 79 [2021-12-28 03:18:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:18:29,382 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 519 transitions. [2021-12-28 03:18:29,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.925925925925926) internal successors, (106), 24 states have internal predecessors, (106), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-28 03:18:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 519 transitions. [2021-12-28 03:18:29,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-28 03:18:29,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:18:29,384 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:18:29,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-28 03:18:29,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-28 03:18:29,597 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:18:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:18:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1547441916, now seen corresponding path program 1 times [2021-12-28 03:18:29,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:18:29,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277428701] [2021-12-28 03:18:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:29,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:18:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:29,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:18:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:29,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:18:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:29,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:18:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:29,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:18:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:29,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:18:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:29,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:18:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:29,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:18:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:29,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:18:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:18:29,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:18:29,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277428701] [2021-12-28 03:18:29,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277428701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:29,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039379022] [2021-12-28 03:18:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:29,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:29,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:18:29,840 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) [2021-12-28 03:18:29,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-28 03:18:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:30,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-28 03:18:30,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:18:30,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:18:30,812 INFO L353 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-12-28 03:18:30,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 20 treesize of output 34 [2021-12-28 03:18:31,225 INFO L353 Elim1Store]: treesize reduction 204, result has 0.5 percent of original size [2021-12-28 03:18:31,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 44 [2021-12-28 03:18:31,230 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 03:18:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:18:31,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:18:31,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039379022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:31,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:18:31,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-28 03:18:31,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455023684] [2021-12-28 03:18:31,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:18:31,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 03:18:31,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:31,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 03:18:31,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=836, Unknown=1, NotChecked=0, Total=930 [2021-12-28 03:18:31,530 INFO L87 Difference]: Start difference. First operand 358 states and 519 transitions. Second operand has 26 states, 24 states have (on average 4.458333333333333) internal successors, (107), 22 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:18:32,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:18:32,272 INFO L93 Difference]: Finished difference Result 407 states and 580 transitions. [2021-12-28 03:18:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-28 03:18:32,272 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.458333333333333) internal successors, (107), 22 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 80 [2021-12-28 03:18:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:18:32,283 INFO L225 Difference]: With dead ends: 407 [2021-12-28 03:18:32,284 INFO L226 Difference]: Without dead ends: 372 [2021-12-28 03:18:32,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=221, Invalid=1848, Unknown=1, NotChecked=0, Total=2070 [2021-12-28 03:18:32,286 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 80 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:18:32,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1587 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 629 Invalid, 0 Unknown, 561 Unchecked, 0.4s Time] [2021-12-28 03:18:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-12-28 03:18:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 358. [2021-12-28 03:18:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 311 states have (on average 1.4662379421221865) internal successors, (456), 317 states have internal predecessors, (456), 26 states have call successors, (26), 16 states have call predecessors, (26), 20 states have return successors, (37), 24 states have call predecessors, (37), 25 states have call successors, (37) [2021-12-28 03:18:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 519 transitions. [2021-12-28 03:18:32,302 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 519 transitions. Word has length 80 [2021-12-28 03:18:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:18:32,302 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 519 transitions. [2021-12-28 03:18:32,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.458333333333333) internal successors, (107), 22 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-28 03:18:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 519 transitions. [2021-12-28 03:18:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-28 03:18:32,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:18:32,304 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:18:32,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-28 03:18:32,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-28 03:18:32,520 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:18:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:18:32,520 INFO L85 PathProgramCache]: Analyzing trace with hash -236206099, now seen corresponding path program 1 times [2021-12-28 03:18:32,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:18:32,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678916899] [2021-12-28 03:18:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:32,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:18:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:18:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:18:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:18:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:18:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:18:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:18:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:18:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:18:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-28 03:18:32,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:18:32,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678916899] [2021-12-28 03:18:32,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678916899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:18:32,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:18:32,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:18:32,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963516253] [2021-12-28 03:18:32,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:18:32,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:18:32,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:18:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:18:32,641 INFO L87 Difference]: Start difference. First operand 358 states and 519 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:18:32,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:18:32,812 INFO L93 Difference]: Finished difference Result 487 states and 703 transitions. [2021-12-28 03:18:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:18:32,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2021-12-28 03:18:32,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:18:32,814 INFO L225 Difference]: With dead ends: 487 [2021-12-28 03:18:32,814 INFO L226 Difference]: Without dead ends: 376 [2021-12-28 03:18:32,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:18:32,815 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 32 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:18:32,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 369 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:18:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-12-28 03:18:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 367. [2021-12-28 03:18:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 320 states have (on average 1.4125) internal successors, (452), 326 states have internal predecessors, (452), 26 states have call successors, (26), 16 states have call predecessors, (26), 20 states have return successors, (37), 24 states have call predecessors, (37), 25 states have call successors, (37) [2021-12-28 03:18:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 515 transitions. [2021-12-28 03:18:32,829 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 515 transitions. Word has length 80 [2021-12-28 03:18:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:18:32,830 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 515 transitions. [2021-12-28 03:18:32,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:18:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 515 transitions. [2021-12-28 03:18:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-28 03:18:32,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:18:32,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-28 03:18:32,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 03:18:32,832 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:18:32,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:18:32,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1687021935, now seen corresponding path program 1 times [2021-12-28 03:18:32,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:18:32,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45921434] [2021-12-28 03:18:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:32,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:18:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:18:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:18:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:18:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 03:18:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:18:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:18:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:32,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:18:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:33,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:18:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:18:33,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:18:33,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45921434] [2021-12-28 03:18:33,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45921434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:33,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371719897] [2021-12-28 03:18:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:18:33,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:18:33,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:18:33,100 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:18:33,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-28 03:18:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:18:33,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-28 03:18:33,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:18:33,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:18:34,084 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:18:34,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 37 [2021-12-28 03:18:34,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:34,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:18:34,407 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-28 03:18:34,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 78 [2021-12-28 03:18:34,423 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-28 03:18:34,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 03:18:34,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-28 03:18:34,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-28 03:18:34,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-12-28 03:18:34,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-12-28 03:18:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:18:34,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:18:35,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371719897] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:18:35,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:18:35,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 30 [2021-12-28 03:18:35,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621256416] [2021-12-28 03:18:35,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:18:35,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-28 03:18:35,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:18:35,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-28 03:18:35,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1068, Unknown=6, NotChecked=0, Total=1190 [2021-12-28 03:18:35,190 INFO L87 Difference]: Start difference. First operand 367 states and 515 transitions. Second operand has 30 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16)