./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.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 e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 22:26:51,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 22:26:51,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 22:26:51,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 22:26:51,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 22:26:51,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 22:26:51,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 22:26:51,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 22:26:51,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 22:26:51,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 22:26:51,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 22:26:51,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 22:26:51,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 22:26:51,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 22:26:51,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 22:26:51,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 22:26:51,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 22:26:51,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 22:26:51,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 22:26:51,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 22:26:51,321 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 22:26:51,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 22:26:51,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 22:26:51,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 22:26:51,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 22:26:51,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 22:26:51,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 22:26:51,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 22:26:51,333 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 22:26:51,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 22:26:51,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 22:26:51,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 22:26:51,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 22:26:51,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 22:26:51,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 22:26:51,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 22:26:51,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 22:26:51,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 22:26:51,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 22:26:51,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 22:26:51,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 22:26:51,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 22:26:51,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-22 22:26:51,369 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 22:26:51,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 22:26:51,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 22:26:51,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 22:26:51,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 22:26:51,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 22:26:51,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 22:26:51,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 22:26:51,372 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 22:26:51,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 22:26:51,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 22:26:51,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 22:26:51,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 22:26:51,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 22:26:51,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 22:26:51,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 22:26:51,374 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 22:26:51,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 22:26:51,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 22:26:51,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 22:26:51,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 22:26:51,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 22:26:51,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 22:26:51,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 22:26:51,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 22:26:51,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 22:26:51,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 22:26:51,376 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 22:26:51,377 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 22:26:51,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 22:26:51,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 [2022-07-22 22:26:51,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 22:26:51,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 22:26:51,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 22:26:51,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 22:26:51,602 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 22:26:51,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2022-07-22 22:26:51,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/476a0aebb/4baf83a14421460896b2dc839d793ba0/FLAG378d6f9fe [2022-07-22 22:26:52,252 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 22:26:52,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2022-07-22 22:26:52,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/476a0aebb/4baf83a14421460896b2dc839d793ba0/FLAG378d6f9fe [2022-07-22 22:26:52,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/476a0aebb/4baf83a14421460896b2dc839d793ba0 [2022-07-22 22:26:52,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 22:26:52,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 22:26:52,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 22:26:52,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 22:26:52,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 22:26:52,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:26:52" (1/1) ... [2022-07-22 22:26:52,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d20c80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:52, skipping insertion in model container [2022-07-22 22:26:52,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:26:52" (1/1) ... [2022-07-22 22:26:52,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 22:26:52,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 22:26:52,755 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2022-07-22 22:26:52,762 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2022-07-22 22:26:53,285 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,286 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,287 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,288 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,289 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,304 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,304 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,307 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,309 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,313 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,314 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,315 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,316 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,515 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-22 22:26:53,516 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-22 22:26:53,517 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-22 22:26:53,517 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-22 22:26:53,518 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-22 22:26:53,519 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-22 22:26:53,519 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-22 22:26:53,520 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-22 22:26:53,520 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-22 22:26:53,521 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-22 22:26:53,617 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-22 22:26:53,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 22:26:53,685 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 22:26:53,696 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2022-07-22 22:26:53,703 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2022-07-22 22:26:53,735 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,736 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,736 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,736 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,737 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,742 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,743 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,744 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,744 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,745 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,745 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,746 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,746 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:53,773 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-22 22:26:53,774 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-22 22:26:53,774 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-22 22:26:53,775 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-22 22:26:53,776 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-22 22:26:53,776 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-22 22:26:53,777 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-22 22:26:53,777 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-22 22:26:53,777 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-22 22:26:53,778 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-22 22:26:53,794 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-22 22:26:53,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 22:26:53,970 INFO L208 MainTranslator]: Completed translation [2022-07-22 22:26:53,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:53 WrapperNode [2022-07-22 22:26:53,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 22:26:53,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 22:26:53,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 22:26:53,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 22:26:53,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:53" (1/1) ... [2022-07-22 22:26:54,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:53" (1/1) ... [2022-07-22 22:26:54,080 INFO L137 Inliner]: procedures = 679, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 29 [2022-07-22 22:26:54,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 22:26:54,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 22:26:54,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 22:26:54,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 22:26:54,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:53" (1/1) ... [2022-07-22 22:26:54,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:53" (1/1) ... [2022-07-22 22:26:54,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:53" (1/1) ... [2022-07-22 22:26:54,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:53" (1/1) ... [2022-07-22 22:26:54,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:53" (1/1) ... [2022-07-22 22:26:54,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:53" (1/1) ... [2022-07-22 22:26:54,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:53" (1/1) ... [2022-07-22 22:26:54,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 22:26:54,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 22:26:54,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 22:26:54,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 22:26:54,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:53" (1/1) ... [2022-07-22 22:26:54,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 22:26:54,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:26:54,145 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) [2022-07-22 22:26:54,171 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 [2022-07-22 22:26:54,186 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2022-07-22 22:26:54,187 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2022-07-22 22:26:54,187 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-07-22 22:26:54,188 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-07-22 22:26:54,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 22:26:54,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 22:26:54,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 22:26:54,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 22:26:54,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 22:26:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 22:26:54,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 22:26:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-22 22:26:54,190 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-22 22:26:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 22:26:54,191 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 22:26:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 22:26:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-22 22:26:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 22:26:54,390 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 22:26:54,404 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 22:26:54,523 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 22:26:54,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 22:26:54,529 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 22:26:54,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:26:54 BoogieIcfgContainer [2022-07-22 22:26:54,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 22:26:54,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 22:26:54,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 22:26:54,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 22:26:54,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:26:52" (1/3) ... [2022-07-22 22:26:54,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f4aa9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:26:54, skipping insertion in model container [2022-07-22 22:26:54,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:53" (2/3) ... [2022-07-22 22:26:54,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f4aa9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:26:54, skipping insertion in model container [2022-07-22 22:26:54,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:26:54" (3/3) ... [2022-07-22 22:26:54,537 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness-1.i [2022-07-22 22:26:54,548 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 22:26:54,549 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 22:26:54,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 22:26:54,602 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c33863c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4be832b0 [2022-07-22 22:26:54,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 22:26:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 22:26:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 22:26:54,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:54,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:54,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:54,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash -527313499, now seen corresponding path program 1 times [2022-07-22 22:26:54,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:54,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990210858] [2022-07-22 22:26:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:54,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:54,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:54,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:54,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:54,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990210858] [2022-07-22 22:26:54,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990210858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:54,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:54,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 22:26:54,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854401739] [2022-07-22 22:26:54,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:54,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 22:26:54,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:54,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 22:26:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 22:26:54,978 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 22:26:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:54,995 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2022-07-22 22:26:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 22:26:54,998 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-22 22:26:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:55,004 INFO L225 Difference]: With dead ends: 75 [2022-07-22 22:26:55,006 INFO L226 Difference]: Without dead ends: 36 [2022-07-22 22:26:55,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 22:26:55,015 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:55,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:26:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-22 22:26:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-22 22:26:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 22:26:55,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-07-22 22:26:55,063 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2022-07-22 22:26:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:55,064 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-07-22 22:26:55,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 22:26:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-07-22 22:26:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 22:26:55,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:55,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:55,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 22:26:55,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:55,070 INFO L85 PathProgramCache]: Analyzing trace with hash 74286250, now seen corresponding path program 1 times [2022-07-22 22:26:55,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:55,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847558519] [2022-07-22 22:26:55,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:55,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:55,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:55,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:26:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:55,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 22:26:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:55,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:55,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847558519] [2022-07-22 22:26:55,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847558519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:55,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:55,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 22:26:55,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379666307] [2022-07-22 22:26:55,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:55,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 22:26:55,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:55,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 22:26:55,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:26:55,406 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 22:26:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:55,560 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-07-22 22:26:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 22:26:55,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-07-22 22:26:55,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:55,563 INFO L225 Difference]: With dead ends: 61 [2022-07-22 22:26:55,563 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 22:26:55,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 22:26:55,566 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 22 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:55,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 78 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:26:55,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 22:26:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-22 22:26:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 22:26:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-07-22 22:26:55,583 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2022-07-22 22:26:55,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:55,583 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-07-22 22:26:55,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 22:26:55,584 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-07-22 22:26:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 22:26:55,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:55,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:55,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 22:26:55,586 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:55,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2047649194, now seen corresponding path program 1 times [2022-07-22 22:26:55,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:55,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044184467] [2022-07-22 22:26:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:55,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:55,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:26:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:55,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 22:26:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:55,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:55,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044184467] [2022-07-22 22:26:55,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044184467] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:26:55,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218643957] [2022-07-22 22:26:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:55,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:26:55,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:26:55,883 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) [2022-07-22 22:26:55,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 22:26:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:55,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 22:26:55,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:26:56,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 22:26:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:56,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:26:56,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-07-22 22:26:56,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-07-22 22:26:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:57,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218643957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:26:57,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:26:57,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2022-07-22 22:26:57,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780934288] [2022-07-22 22:26:57,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:26:57,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 22:26:57,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:57,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 22:26:57,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-22 22:26:57,009 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 22:26:57,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:57,420 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-07-22 22:26:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 22:26:57,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 27 [2022-07-22 22:26:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:57,423 INFO L225 Difference]: With dead ends: 70 [2022-07-22 22:26:57,423 INFO L226 Difference]: Without dead ends: 46 [2022-07-22 22:26:57,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-07-22 22:26:57,425 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:57,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 183 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 209 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-07-22 22:26:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-22 22:26:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2022-07-22 22:26:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 22:26:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-22 22:26:57,433 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2022-07-22 22:26:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:57,433 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-22 22:26:57,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 22:26:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-22 22:26:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 22:26:57,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:57,435 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 22:26:57,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 22:26:57,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:26:57,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:57,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash 891828778, now seen corresponding path program 2 times [2022-07-22 22:26:57,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:57,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950374464] [2022-07-22 22:26:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:57,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:57,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:57,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:26:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:57,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 22:26:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:57,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:57,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950374464] [2022-07-22 22:26:57,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950374464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:26:57,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346653533] [2022-07-22 22:26:57,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:26:57,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:26:57,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:26:57,856 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) [2022-07-22 22:26:57,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 22:26:57,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:26:57,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:26:57,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 22:26:57,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:26:57,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-22 22:26:58,032 INFO L356 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2022-07-22 22:26:58,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-22 22:26:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:58,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:26:58,848 INFO L390 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 20 treesize of output 18 [2022-07-22 22:26:58,852 INFO L390 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 148 treesize of output 144 [2022-07-22 22:26:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:58,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346653533] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:26:58,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:26:58,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2022-07-22 22:26:58,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044605304] [2022-07-22 22:26:58,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:26:58,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 22:26:58,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:58,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 22:26:58,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-07-22 22:26:58,946 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 22:26:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:59,383 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-07-22 22:26:59,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 22:26:59,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 28 [2022-07-22 22:26:59,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:59,385 INFO L225 Difference]: With dead ends: 71 [2022-07-22 22:26:59,385 INFO L226 Difference]: Without dead ends: 47 [2022-07-22 22:26:59,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-07-22 22:26:59,386 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:59,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 219 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 218 Invalid, 0 Unknown, 165 Unchecked, 0.2s Time] [2022-07-22 22:26:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-22 22:26:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2022-07-22 22:26:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 22:26:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-07-22 22:26:59,399 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 28 [2022-07-22 22:26:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:59,399 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-07-22 22:26:59,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 22:26:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-07-22 22:26:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 22:26:59,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:59,402 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 22:26:59,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 22:26:59,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 22:26:59,603 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:59,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:59,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1821332694, now seen corresponding path program 3 times [2022-07-22 22:26:59,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:59,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452784904] [2022-07-22 22:26:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:59,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:59,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:59,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:26:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:59,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 22:26:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:59,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:59,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452784904] [2022-07-22 22:26:59,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452784904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:26:59,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482581391] [2022-07-22 22:26:59,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 22:26:59,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:26:59,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:26:59,800 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) [2022-07-22 22:26:59,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 22:26:59,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 22:26:59,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:26:59,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 22:26:59,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:26:59,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-22 22:26:59,965 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-22 22:26:59,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 22:27:00,014 INFO L356 Elim1Store]: treesize reduction 72, result has 22.6 percent of original size [2022-07-22 22:27:00,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-07-22 22:27:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:27:06,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:27:06,895 INFO L390 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 26 treesize of output 24 [2022-07-22 22:27:06,899 INFO L390 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 656 treesize of output 648 [2022-07-22 22:27:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:27:07,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482581391] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:27:07,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:27:07,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 24 [2022-07-22 22:27:07,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690760874] [2022-07-22 22:27:07,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:27:07,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 22:27:07,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:27:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 22:27:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=482, Unknown=3, NotChecked=0, Total=552 [2022-07-22 22:27:07,223 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 22 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 22:27:07,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:27:07,880 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-07-22 22:27:07,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 22:27:07,881 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 22 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 29 [2022-07-22 22:27:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:27:07,882 INFO L225 Difference]: With dead ends: 73 [2022-07-22 22:27:07,882 INFO L226 Difference]: Without dead ends: 49 [2022-07-22 22:27:07,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=121, Invalid=868, Unknown=3, NotChecked=0, Total=992 [2022-07-22 22:27:07,884 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 22:27:07,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 184 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 242 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-07-22 22:27:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-22 22:27:07,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-07-22 22:27:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-22 22:27:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-07-22 22:27:07,892 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 29 [2022-07-22 22:27:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:27:07,893 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-07-22 22:27:07,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 22 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 22:27:07,893 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-07-22 22:27:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 22:27:07,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:27:07,894 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:27:07,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 22:27:08,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:27:08,116 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:27:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:27:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash -996879181, now seen corresponding path program 1 times [2022-07-22 22:27:08,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:27:08,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889008405] [2022-07-22 22:27:08,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:27:08,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:27:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:08,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:27:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:08,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:27:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:08,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 22:27:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 22:27:08,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:27:08,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889008405] [2022-07-22 22:27:08,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889008405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:27:08,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:27:08,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 22:27:08,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088878329] [2022-07-22 22:27:08,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:27:08,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 22:27:08,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:27:08,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 22:27:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 22:27:08,231 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 22:27:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:27:08,338 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-07-22 22:27:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 22:27:08,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-07-22 22:27:08,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:27:08,339 INFO L225 Difference]: With dead ends: 54 [2022-07-22 22:27:08,339 INFO L226 Difference]: Without dead ends: 52 [2022-07-22 22:27:08,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-22 22:27:08,340 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 26 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:27:08,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 115 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:27:08,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-22 22:27:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-07-22 22:27:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 22:27:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-22 22:27:08,349 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 30 [2022-07-22 22:27:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:27:08,349 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-22 22:27:08,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 22:27:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-22 22:27:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 22:27:08,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:27:08,351 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-07-22 22:27:08,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 22:27:08,351 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:27:08,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:27:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash 508754072, now seen corresponding path program 1 times [2022-07-22 22:27:08,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:27:08,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393139753] [2022-07-22 22:27:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:27:08,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:27:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:08,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:27:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:08,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:27:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:08,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 22:27:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 22:27:08,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:27:08,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393139753] [2022-07-22 22:27:08,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393139753] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:27:08,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846900114] [2022-07-22 22:27:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:27:08,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:27:08,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:27:08,544 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) [2022-07-22 22:27:08,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 22:27:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 22:27:08,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:27:08,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-22 22:27:08,797 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-22 22:27:08,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 22:27:08,850 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:27:08,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:27:08,911 INFO L356 Elim1Store]: treesize reduction 72, result has 22.6 percent of original size [2022-07-22 22:27:08,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-07-22 22:27:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:27:09,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:27:10,841 INFO L390 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 68 treesize of output 64 [2022-07-22 22:27:10,860 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 22:27:10,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2282 treesize of output 2262 [2022-07-22 22:27:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:27:11,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846900114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:27:11,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:27:11,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 33 [2022-07-22 22:27:11,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227967786] [2022-07-22 22:27:11,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:27:11,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 22:27:11,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:27:11,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 22:27:11,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 22:27:11,271 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 31 states have internal predecessors, (56), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 22:27:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:27:12,633 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2022-07-22 22:27:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 22:27:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 31 states have internal predecessors, (56), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2022-07-22 22:27:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:27:12,634 INFO L225 Difference]: With dead ends: 99 [2022-07-22 22:27:12,634 INFO L226 Difference]: Without dead ends: 64 [2022-07-22 22:27:12,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=208, Invalid=1770, Unknown=2, NotChecked=0, Total=1980 [2022-07-22 22:27:12,636 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 22:27:12,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 220 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 543 Invalid, 0 Unknown, 165 Unchecked, 0.6s Time] [2022-07-22 22:27:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-22 22:27:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2022-07-22 22:27:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 41 states have internal predecessors, (46), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 22:27:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-22 22:27:12,646 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 33 [2022-07-22 22:27:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:27:12,646 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-22 22:27:12,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 31 states have internal predecessors, (56), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 22:27:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-22 22:27:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 22:27:12,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:27:12,648 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:27:12,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 22:27:12,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:27:12,873 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:27:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:27:12,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1979289706, now seen corresponding path program 2 times [2022-07-22 22:27:12,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:27:12,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169055785] [2022-07-22 22:27:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:27:12,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:27:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:12,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:27:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:12,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:27:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:13,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 22:27:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 22:27:13,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:27:13,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169055785] [2022-07-22 22:27:13,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169055785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:27:13,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836033337] [2022-07-22 22:27:13,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:27:13,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:27:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:27:13,119 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) [2022-07-22 22:27:13,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 22:27:13,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:27:13,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:27:13,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-22 22:27:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:27:13,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-22 22:27:13,366 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-22 22:27:13,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 22:27:13,433 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:27:13,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:27:13,500 INFO L356 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2022-07-22 22:27:13,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2022-07-22 22:27:13,593 INFO L356 Elim1Store]: treesize reduction 194, result has 17.1 percent of original size [2022-07-22 22:27:13,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 61 [2022-07-22 22:27:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:27:18,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:27:19,803 INFO L390 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 68 treesize of output 64 [2022-07-22 22:27:25,514 INFO L390 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 78 treesize of output 74 [2022-07-22 22:27:25,527 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 22:27:25,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1424 treesize of output 1418 [2022-07-22 22:27:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:27:25,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836033337] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:27:25,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:27:25,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 16] total 38 [2022-07-22 22:27:25,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358485300] [2022-07-22 22:27:25,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:27:25,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 22:27:25,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:27:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 22:27:25,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1252, Unknown=4, NotChecked=0, Total=1406 [2022-07-22 22:27:25,751 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 36 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 22:27:42,388 WARN L233 SmtUtils]: Spent 9.95s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:27:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:27:50,246 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2022-07-22 22:27:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 22:27:50,247 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 36 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-07-22 22:27:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:27:50,247 INFO L225 Difference]: With dead ends: 106 [2022-07-22 22:27:50,248 INFO L226 Difference]: Without dead ends: 68 [2022-07-22 22:27:50,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=277, Invalid=2466, Unknown=13, NotChecked=0, Total=2756 [2022-07-22 22:27:50,249 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 33 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 22:27:50,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 281 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 588 Invalid, 0 Unknown, 299 Unchecked, 0.5s Time] [2022-07-22 22:27:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-22 22:27:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2022-07-22 22:27:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 45 states have internal predecessors, (52), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 22:27:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-07-22 22:27:50,261 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 37 [2022-07-22 22:27:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:27:50,261 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-07-22 22:27:50,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 36 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 22:27:50,261 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-07-22 22:27:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 22:27:50,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:27:50,262 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 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] [2022-07-22 22:27:50,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 22:27:50,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:27:50,468 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:27:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:27:50,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1165720024, now seen corresponding path program 3 times [2022-07-22 22:27:50,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:27:50,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090992335] [2022-07-22 22:27:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:27:50,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:27:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:50,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:27:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:50,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:27:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:50,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 22:27:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:27:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 22:27:50,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:27:50,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090992335] [2022-07-22 22:27:50,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090992335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:27:50,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671231577] [2022-07-22 22:27:50,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 22:27:50,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:27:50,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:27:50,761 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) [2022-07-22 22:27:50,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 22:27:51,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 22:27:51,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:27:51,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-22 22:27:51,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:27:51,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-22 22:27:51,138 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-22 22:27:51,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 22:27:51,185 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:27:51,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:27:51,264 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-22 22:27:51,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-22 22:27:51,345 INFO L356 Elim1Store]: treesize reduction 200, result has 17.0 percent of original size [2022-07-22 22:27:51,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2022-07-22 22:27:51,434 INFO L356 Elim1Store]: treesize reduction 200, result has 17.0 percent of original size [2022-07-22 22:27:51,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2022-07-22 22:27:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:27:56,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:27:57,701 INFO L390 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 39 treesize of output 37 [2022-07-22 22:28:00,894 INFO L390 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 45 treesize of output 43 [2022-07-22 22:28:00,910 INFO L390 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 3090 treesize of output 3082 [2022-07-22 22:28:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 32 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:28:02,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671231577] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:28:02,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:28:02,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20, 16] total 42 [2022-07-22 22:28:02,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857477675] [2022-07-22 22:28:02,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:28:02,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 22:28:02,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:28:02,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 22:28:02,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1562, Unknown=5, NotChecked=0, Total=1722 [2022-07-22 22:28:02,989 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 42 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 6 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-22 22:28:15,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:28:15,542 INFO L93 Difference]: Finished difference Result 122 states and 152 transitions. [2022-07-22 22:28:15,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 22:28:15,543 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 6 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 41 [2022-07-22 22:28:15,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:28:15,544 INFO L225 Difference]: With dead ends: 122 [2022-07-22 22:28:15,544 INFO L226 Difference]: Without dead ends: 81 [2022-07-22 22:28:15,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=283, Invalid=3242, Unknown=15, NotChecked=0, Total=3540 [2022-07-22 22:28:15,548 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 73 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:28:15,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 207 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1022 Invalid, 0 Unknown, 570 Unchecked, 1.0s Time] [2022-07-22 22:28:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-22 22:28:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2022-07-22 22:28:15,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 49 states have internal predecessors, (58), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 22:28:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-07-22 22:28:15,561 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 41 [2022-07-22 22:28:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:28:15,562 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-07-22 22:28:15,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 6 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-22 22:28:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-07-22 22:28:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 22:28:15,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:28:15,563 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:28:15,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 22:28:15,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:28:15,780 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:28:15,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:28:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash -150209962, now seen corresponding path program 4 times [2022-07-22 22:28:15,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:28:15,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379379928] [2022-07-22 22:28:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:28:15,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:28:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:15,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:28:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:15,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 22:28:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:16,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:28:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 22:28:16,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:28:16,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379379928] [2022-07-22 22:28:16,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379379928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:28:16,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303530153] [2022-07-22 22:28:16,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 22:28:16,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:28:16,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:28:16,074 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) [2022-07-22 22:28:16,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 22:28:16,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 22:28:16,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:28:16,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-22 22:28:16,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:28:16,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-22 22:28:16,398 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-22 22:28:16,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 22:28:16,438 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:28:16,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:28:16,505 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-22 22:28:16,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-22 22:28:16,588 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-22 22:28:16,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-22 22:28:16,713 INFO L356 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2022-07-22 22:28:16,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2022-07-22 22:28:16,828 INFO L356 Elim1Store]: treesize reduction 384, result has 13.7 percent of original size [2022-07-22 22:28:16,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 88 [2022-07-22 22:28:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:28:18,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:28:20,441 INFO L390 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 104 treesize of output 100 [2022-07-22 22:28:20,453 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 22:28:20,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56830 treesize of output 56762