./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-data/packet_filter.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/heap-data/packet_filter.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 32bit --witnessprinter.graph.data.programhash d604fdd8f7c4d34db0106d8a0ff422218ae80e9ee6eb03f691b84d2fcc8ad49f --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 10:50:12,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:50:12,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:50:12,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:50:12,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:50:12,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:50:12,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:50:12,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:50:12,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:50:12,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:50:12,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:50:12,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:50:12,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:50:12,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:50:12,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:50:12,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:50:12,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:50:12,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:50:12,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:50:12,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:50:12,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:50:12,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:50:12,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:50:12,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:50:12,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:50:12,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:50:12,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:50:12,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:50:12,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:50:12,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:50:12,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:50:12,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:50:12,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:50:12,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:50:12,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:50:12,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:50:12,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:50:12,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:50:12,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:50:12,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:50:12,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:50:12,491 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:50:12,516 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:50:12,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:50:12,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:50:12,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:50:12,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:50:12,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:50:12,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:50:12,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:50:12,520 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:50:12,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:50:12,521 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:50:12,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:50:12,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:50:12,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:50:12,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:50:12,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:50:12,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:50:12,522 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:50:12,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:50:12,522 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:50:12,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:50:12,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:50:12,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:50:12,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:50:12,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:50:12,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:50:12,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:50:12,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:50:12,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:50:12,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:50:12,524 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:50:12,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:50:12,525 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:50:12,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:50:12,525 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:50:12,525 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d604fdd8f7c4d34db0106d8a0ff422218ae80e9ee6eb03f691b84d2fcc8ad49f [2023-02-15 10:50:12,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:50:12,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:50:12,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:50:12,726 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:50:12,726 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:50:12,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/packet_filter.i [2023-02-15 10:50:13,813 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:50:14,045 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:50:14,045 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i [2023-02-15 10:50:14,062 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2618321e/bd145363c9a74cb7a3e9b1ea30402104/FLAG5d4e22263 [2023-02-15 10:50:14,078 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2618321e/bd145363c9a74cb7a3e9b1ea30402104 [2023-02-15 10:50:14,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:50:14,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:50:14,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:50:14,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:50:14,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:50:14,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@803c9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14, skipping insertion in model container [2023-02-15 10:50:14,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:50:14,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:50:14,299 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_nondet_charp [2023-02-15 10:50:14,308 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i[23925,23938] [2023-02-15 10:50:14,319 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i[24159,24172] [2023-02-15 10:50:14,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:50:14,333 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:50:14,361 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_nondet_charp [2023-02-15 10:50:14,364 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i[23925,23938] [2023-02-15 10:50:14,366 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i[24159,24172] [2023-02-15 10:50:14,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:50:14,391 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:50:14,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14 WrapperNode [2023-02-15 10:50:14,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:50:14,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:50:14,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:50:14,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:50:14,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,425 INFO L138 Inliner]: procedures = 130, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 156 [2023-02-15 10:50:14,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:50:14,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:50:14,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:50:14,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:50:14,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,455 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:50:14,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:50:14,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:50:14,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:50:14,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14" (1/1) ... [2023-02-15 10:50:14,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:50:14,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:50:14,504 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) [2023-02-15 10:50:14,509 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 [2023-02-15 10:50:14,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 10:50:14,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 10:50:14,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 10:50:14,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:50:14,542 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_queue [2023-02-15 10:50:14,542 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_queue [2023-02-15 10:50:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 10:50:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 10:50:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 10:50:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_charp [2023-02-15 10:50:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure send [2023-02-15 10:50:14,544 INFO L138 BoogieDeclarations]: Found implementation of procedure send [2023-02-15 10:50:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 10:50:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 10:50:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:50:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:50:14,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:50:14,635 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:50:14,637 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:50:14,934 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:50:14,939 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:50:14,939 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 10:50:14,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:50:14 BoogieIcfgContainer [2023-02-15 10:50:14,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:50:14,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:50:14,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:50:14,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:50:14,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:50:14" (1/3) ... [2023-02-15 10:50:14,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb56b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:50:14, skipping insertion in model container [2023-02-15 10:50:14,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:50:14" (2/3) ... [2023-02-15 10:50:14,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb56b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:50:14, skipping insertion in model container [2023-02-15 10:50:14,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:50:14" (3/3) ... [2023-02-15 10:50:14,947 INFO L112 eAbstractionObserver]: Analyzing ICFG packet_filter.i [2023-02-15 10:50:14,960 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:50:14,961 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-02-15 10:50:14,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:50:15,011 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@71c1c8bf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:50:15,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-02-15 10:50:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 37 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 10:50:15,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 10:50:15,020 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:50:15,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:50:15,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:50:15,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:50:15,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2117090455, now seen corresponding path program 1 times [2023-02-15 10:50:15,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:50:15,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844113502] [2023-02-15 10:50:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:50:15,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:50:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:15,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:50:15,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844113502] [2023-02-15 10:50:15,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844113502] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:50:15,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:50:15,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 10:50:15,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728362979] [2023-02-15 10:50:15,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:50:15,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 10:50:15,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:50:15,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 10:50:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:50:15,205 INFO L87 Difference]: Start difference. First operand has 45 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 37 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:15,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:50:15,223 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2023-02-15 10:50:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 10:50:15,225 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 10:50:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:50:15,232 INFO L225 Difference]: With dead ends: 72 [2023-02-15 10:50:15,232 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 10:50:15,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:50:15,240 INFO L413 NwaCegarLoop]: 55 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, 55 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 [2023-02-15 10:50:15,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:50:15,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 10:50:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-15 10:50:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.28125) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 10:50:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-02-15 10:50:15,274 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 8 [2023-02-15 10:50:15,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:50:15,274 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-02-15 10:50:15,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:15,275 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-02-15 10:50:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 10:50:15,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:50:15,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:50:15,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 10:50:15,277 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:50:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:50:15,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1351761174, now seen corresponding path program 1 times [2023-02-15 10:50:15,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:50:15,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477718121] [2023-02-15 10:50:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:50:15,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:50:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:15,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:50:15,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477718121] [2023-02-15 10:50:15,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477718121] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:50:15,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:50:15,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:50:15,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370190863] [2023-02-15 10:50:15,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:50:15,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:50:15,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:50:15,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:50:15,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:50:15,472 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:50:15,585 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2023-02-15 10:50:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 10:50:15,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-15 10:50:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:50:15,587 INFO L225 Difference]: With dead ends: 75 [2023-02-15 10:50:15,588 INFO L226 Difference]: Without dead ends: 53 [2023-02-15 10:50:15,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:50:15,589 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 29 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:50:15,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 114 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:50:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-15 10:50:15,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2023-02-15 10:50:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 10:50:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-02-15 10:50:15,609 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 9 [2023-02-15 10:50:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:50:15,609 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-02-15 10:50:15,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-02-15 10:50:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 10:50:15,611 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:50:15,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:50:15,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 10:50:15,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:50:15,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:50:15,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2000471293, now seen corresponding path program 1 times [2023-02-15 10:50:15,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:50:15,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963412017] [2023-02-15 10:50:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:50:15,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:50:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:15,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:50:15,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963412017] [2023-02-15 10:50:15,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963412017] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:50:15,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:50:15,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:50:15,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451841753] [2023-02-15 10:50:15,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:50:15,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:50:15,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:50:15,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:50:15,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:50:15,719 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:50:15,775 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2023-02-15 10:50:15,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:50:15,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 10:50:15,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:50:15,776 INFO L225 Difference]: With dead ends: 59 [2023-02-15 10:50:15,776 INFO L226 Difference]: Without dead ends: 43 [2023-02-15 10:50:15,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:50:15,778 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:50:15,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 128 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:50:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-15 10:50:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-02-15 10:50:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 10:50:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2023-02-15 10:50:15,783 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 11 [2023-02-15 10:50:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:50:15,783 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2023-02-15 10:50:15,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2023-02-15 10:50:15,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 10:50:15,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:50:15,784 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:50:15,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 10:50:15,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:50:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:50:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1234633309, now seen corresponding path program 1 times [2023-02-15 10:50:15,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:50:15,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296007703] [2023-02-15 10:50:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:50:15,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:50:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 10:50:15,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:50:15,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296007703] [2023-02-15 10:50:15,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296007703] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:50:15,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:50:15,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 10:50:15,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183963286] [2023-02-15 10:50:15,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:50:15,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:50:15,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:50:15,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:50:15,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:50:15,845 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:15,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:50:15,857 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-02-15 10:50:15,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:50:15,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 10:50:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:50:15,860 INFO L225 Difference]: With dead ends: 46 [2023-02-15 10:50:15,861 INFO L226 Difference]: Without dead ends: 44 [2023-02-15 10:50:15,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:50:15,862 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:50:15,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:50:15,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-15 10:50:15,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-15 10:50:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 10:50:15,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-02-15 10:50:15,874 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 14 [2023-02-15 10:50:15,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:50:15,874 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-02-15 10:50:15,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:15,875 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-02-15 10:50:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 10:50:15,875 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:50:15,876 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:50:15,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 10:50:15,876 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:50:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:50:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1234631387, now seen corresponding path program 1 times [2023-02-15 10:50:15,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:50:15,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668978300] [2023-02-15 10:50:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:50:15,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:50:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:16,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:50:16,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668978300] [2023-02-15 10:50:16,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668978300] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:50:16,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043759917] [2023-02-15 10:50:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:50:16,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:50:16,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:50:16,263 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) [2023-02-15 10:50:16,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 10:50:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:16,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 10:50:16,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:50:16,435 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 10:50:16,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-02-15 10:50:16,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:50:16,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:50:16,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:50:16,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:50:16,495 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:50:16,495 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 15 [2023-02-15 10:50:16,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 10:50:16,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 10:50:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:16,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:50:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:16,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043759917] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:50:16,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:50:16,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-02-15 10:50:16,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007401537] [2023-02-15 10:50:16,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:50:16,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:50:16,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:50:16,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:50:16,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:50:16,697 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:50:16,830 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2023-02-15 10:50:16,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 10:50:16,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 10:50:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:50:16,831 INFO L225 Difference]: With dead ends: 87 [2023-02-15 10:50:16,831 INFO L226 Difference]: Without dead ends: 64 [2023-02-15 10:50:16,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:50:16,832 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:50:16,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 137 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:50:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-15 10:50:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2023-02-15 10:50:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 43 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 10:50:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-02-15 10:50:16,836 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 14 [2023-02-15 10:50:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:50:16,841 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-02-15 10:50:16,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-02-15 10:50:16,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 10:50:16,843 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:50:16,843 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:50:16,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 10:50:17,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:50:17,049 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:50:17,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:50:17,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1109742724, now seen corresponding path program 1 times [2023-02-15 10:50:17,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:50:17,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444454656] [2023-02-15 10:50:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:50:17,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:50:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:17,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:50:17,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444454656] [2023-02-15 10:50:17,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444454656] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:50:17,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744020500] [2023-02-15 10:50:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:50:17,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:50:17,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:50:17,409 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) [2023-02-15 10:50:17,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 10:50:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:17,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 10:50:17,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:50:17,519 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 10:50:17,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 10:50:17,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:50:17,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:50:17,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:50:17,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:50:17,549 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:50:17,549 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 15 [2023-02-15 10:50:17,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 10:50:17,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 10:50:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:17,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:50:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:17,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744020500] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:50:17,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:50:17,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-02-15 10:50:17,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453332315] [2023-02-15 10:50:17,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:50:17,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:50:17,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:50:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:50:17,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:50:17,689 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:50:17,819 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2023-02-15 10:50:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 10:50:17,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 10:50:17,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:50:17,820 INFO L225 Difference]: With dead ends: 70 [2023-02-15 10:50:17,820 INFO L226 Difference]: Without dead ends: 54 [2023-02-15 10:50:17,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:50:17,821 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:50:17,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:50:17,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-15 10:50:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2023-02-15 10:50:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 10:50:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-02-15 10:50:17,825 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 16 [2023-02-15 10:50:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:50:17,825 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-02-15 10:50:17,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-02-15 10:50:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 10:50:17,826 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:50:17,826 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:50:17,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 10:50:18,033 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,SelfDestructingSolverStorable5 [2023-02-15 10:50:18,034 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:50:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:50:18,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1773797748, now seen corresponding path program 1 times [2023-02-15 10:50:18,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:50:18,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417679141] [2023-02-15 10:50:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:50:18,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:50:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:18,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 10:50:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:19,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:50:19,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417679141] [2023-02-15 10:50:19,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417679141] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:50:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204621194] [2023-02-15 10:50:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:50:19,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:50:19,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:50:19,065 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) [2023-02-15 10:50:19,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 10:50:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:19,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-15 10:50:19,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:50:19,343 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 9 [2023-02-15 10:50:19,441 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-02-15 10:50:19,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2023-02-15 10:50:19,483 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:50:19,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:50:19,525 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:50:19,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:50:19,572 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-15 10:50:19,572 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 60 [2023-02-15 10:50:19,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:50:19,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:50:19,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 10:50:19,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:50:19,704 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:50:19,718 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:50:19,722 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:50:19,775 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:50:19,776 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 47 treesize of output 5 [2023-02-15 10:50:19,779 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:50:19,806 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:50:19,807 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:50:19,807 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 27 [2023-02-15 10:50:19,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-02-15 10:50:20,253 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2023-02-15 10:50:20,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 179 treesize of output 177 [2023-02-15 10:50:20,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:50:20,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 158 [2023-02-15 10:50:20,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2023-02-15 10:50:20,309 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 39 [2023-02-15 10:50:20,317 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2023-02-15 10:50:20,340 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 25 [2023-02-15 10:50:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:20,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:50:20,620 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2023-02-15 10:50:20,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 79 [2023-02-15 10:50:20,628 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:50:20,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2023-02-15 10:50:20,632 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 9 [2023-02-15 10:50:20,730 INFO L321 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2023-02-15 10:50:20,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 1 [2023-02-15 10:50:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:20,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204621194] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:50:20,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:50:20,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 26 [2023-02-15 10:50:20,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75842393] [2023-02-15 10:50:20,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:50:20,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 10:50:20,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:50:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 10:50:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=559, Unknown=1, NotChecked=0, Total=650 [2023-02-15 10:50:20,836 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 25 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 10:50:21,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:50:21,955 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2023-02-15 10:50:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 10:50:21,955 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 25 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-02-15 10:50:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:50:21,956 INFO L225 Difference]: With dead ends: 90 [2023-02-15 10:50:21,956 INFO L226 Difference]: Without dead ends: 67 [2023-02-15 10:50:21,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=199, Invalid=986, Unknown=5, NotChecked=0, Total=1190 [2023-02-15 10:50:21,957 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 118 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 10:50:21,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 484 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 10:50:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-15 10:50:21,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-02-15 10:50:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 10:50:21,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2023-02-15 10:50:21,963 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 20 [2023-02-15 10:50:21,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:50:21,963 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2023-02-15 10:50:21,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 25 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 10:50:21,963 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2023-02-15 10:50:21,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 10:50:21,963 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:50:21,963 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:50:21,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 10:50:22,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:50:22,169 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:50:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:50:22,170 INFO L85 PathProgramCache]: Analyzing trace with hash 152213004, now seen corresponding path program 2 times [2023-02-15 10:50:22,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:50:22,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202335087] [2023-02-15 10:50:22,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:50:22,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:50:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:22,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:50:22,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202335087] [2023-02-15 10:50:22,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202335087] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:50:22,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776703600] [2023-02-15 10:50:22,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:50:22,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:50:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:50:22,427 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) [2023-02-15 10:50:22,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 10:50:22,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:50:22,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:50:22,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 10:50:22,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:50:22,560 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 10:50:22,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-02-15 10:50:22,594 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-02-15 10:50:22,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-02-15 10:50:22,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:50:22,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:50:22,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-02-15 10:50:22,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:50:22,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:50:22,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:50:22,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:50:22,663 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-02-15 10:50:22,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 10:50:22,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 10:50:22,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 10:50:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 10:50:22,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:50:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:50:24,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776703600] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:50:24,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:50:24,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-02-15 10:50:24,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137036446] [2023-02-15 10:50:24,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:50:24,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 10:50:24,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:50:24,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 10:50:24,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=68, Unknown=1, NotChecked=0, Total=110 [2023-02-15 10:50:24,866 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:50:25,071 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2023-02-15 10:50:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 10:50:25,072 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 10:50:25,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:50:25,072 INFO L225 Difference]: With dead ends: 98 [2023-02-15 10:50:25,072 INFO L226 Difference]: Without dead ends: 75 [2023-02-15 10:50:25,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=49, Invalid=82, Unknown=1, NotChecked=0, Total=132 [2023-02-15 10:50:25,073 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 81 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:50:25,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 162 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:50:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-15 10:50:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2023-02-15 10:50:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 54 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 10:50:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2023-02-15 10:50:25,079 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 19 [2023-02-15 10:50:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:50:25,079 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2023-02-15 10:50:25,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:50:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2023-02-15 10:50:25,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 10:50:25,080 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:50:25,080 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] [2023-02-15 10:50:25,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 10:50:25,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:50:25,288 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:50:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:50:25,289 INFO L85 PathProgramCache]: Analyzing trace with hash 16596088, now seen corresponding path program 1 times [2023-02-15 10:50:25,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:50:25,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349723225] [2023-02-15 10:50:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:50:25,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:50:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:25,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 10:50:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:50:51,040 WARN L233 SmtUtils]: Spent 13.52s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:51:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:51:02,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:51:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349723225] [2023-02-15 10:51:02,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349723225] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:51:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497878148] [2023-02-15 10:51:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:51:02,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:51:02,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:51:02,187 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) [2023-02-15 10:51:02,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 10:51:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:02,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-15 10:51:02,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:51:02,341 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 10:51:02,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-02-15 10:51:02,424 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-02-15 10:51:02,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-02-15 10:51:02,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:51:02,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:51:02,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-15 10:51:02,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-15 10:51:02,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 10:51:02,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 18 [2023-02-15 10:51:02,800 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_876 (Array Int Int)) (v_ArrVal_865 (Array Int Int)) (v_arrayElimArr_8 (Array Int Int)) (v_ArrVal_867 (Array Int Int)) (|v_append_to_queue_~#p.base_18| Int) (append_to_queue_~node~0.base Int) (v_ArrVal_883 (Array Int Int)) (v_ArrVal_871 (Array Int Int))) (and (= (select |c_old(#valid)| |v_append_to_queue_~#p.base_18|) 0) (= (select v_arrayElimArr_8 8) |c_append_to_queue_#in~p.payload.base|) (= (store (store (store |c_old(#memory_$Pointer$.base)| |v_append_to_queue_~#p.base_18| v_arrayElimArr_8) append_to_queue_~node~0.base v_ArrVal_883) |c_append_to_queue_#in~q.base| v_ArrVal_867) |c_#memory_$Pointer$.base|) (< append_to_queue_~node~0.base |c_#StackHeapBarrier|) (= (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| |v_append_to_queue_~#p.base_18| v_ArrVal_876))) (store (store .cse0 append_to_queue_~node~0.base v_ArrVal_865) |c_append_to_queue_#in~q.base| (store (select (store .cse0 append_to_queue_~node~0.base v_ArrVal_871) |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset| 0))) |c_#memory_$Pointer$.offset|))) is different from true [2023-02-15 10:51:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:02,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:02,984 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2023-02-15 10:51:02,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 249 [2023-02-15 10:51:03,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:03,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:03,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:03,082 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2023-02-15 10:51:03,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 58 [2023-02-15 10:51:03,139 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-15 10:51:03,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 10:51:03,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:03,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:03,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-02-15 10:51:03,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-02-15 10:51:03,269 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 9 [2023-02-15 10:51:03,284 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 9 [2023-02-15 10:51:03,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:03,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:03,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-02-15 10:51:03,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:03,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-02-15 10:51:03,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:03,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:03,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:03,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-02-15 10:51:03,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:03,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-02-15 10:51:03,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:03,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-02-15 10:51:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:03,471 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:51:03,475 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:51:03,489 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-02-15 10:51:03,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 166 [2023-02-15 10:51:03,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2023-02-15 10:51:03,560 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:51:03,563 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:51:03,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 158 [2023-02-15 10:51:03,585 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:51:03,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:03,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:03,948 INFO L321 Elim1Store]: treesize reduction 56, result has 41.7 percent of original size [2023-02-15 10:51:03,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 618 treesize of output 511 [2023-02-15 10:51:04,160 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:51:04,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:04,243 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-15 10:51:04,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 5 [2023-02-15 10:51:04,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:04,276 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:51:04,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 81 [2023-02-15 10:51:04,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:04,336 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:51:04,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 21 [2023-02-15 10:51:04,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 10:51:04,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-02-15 10:51:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:51:04,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:51:04,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:51:04,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 51 [2023-02-15 10:51:04,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-02-15 10:51:08,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497878148] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:51:08,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:51:08,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2023-02-15 10:51:08,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699128009] [2023-02-15 10:51:08,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:51:08,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 10:51:08,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:51:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 10:51:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=137, Unknown=1, NotChecked=24, Total=210 [2023-02-15 10:51:08,415 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 10:51:13,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:51:16,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:51:18,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:51:21,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 10:51:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:51:21,450 INFO L93 Difference]: Finished difference Result 112 states and 142 transitions. [2023-02-15 10:51:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 10:51:21,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-02-15 10:51:21,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:51:21,452 INFO L225 Difference]: With dead ends: 112 [2023-02-15 10:51:21,452 INFO L226 Difference]: Without dead ends: 89 [2023-02-15 10:51:21,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=79, Invalid=266, Unknown=1, NotChecked=34, Total=380 [2023-02-15 10:51:21,453 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 69 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 23 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:51:21,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 222 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 211 Invalid, 4 Unknown, 95 Unchecked, 11.4s Time] [2023-02-15 10:51:21,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-15 10:51:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 69. [2023-02-15 10:51:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 60 states have internal predecessors, (76), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 10:51:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2023-02-15 10:51:21,470 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 21 [2023-02-15 10:51:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:51:21,470 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2023-02-15 10:51:21,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 10:51:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2023-02-15 10:51:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 10:51:21,473 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:51:21,473 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] [2023-02-15 10:51:21,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 10:51:21,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:51:21,683 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:51:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:51:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1658546872, now seen corresponding path program 1 times [2023-02-15 10:51:21,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:51:21,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684049594] [2023-02-15 10:51:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:51:21,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:51:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:22,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 10:51:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:51:22,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:51:22,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684049594] [2023-02-15 10:51:22,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684049594] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:51:22,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715181286] [2023-02-15 10:51:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:51:22,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:51:22,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:51:22,421 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) [2023-02-15 10:51:22,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 10:51:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:22,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-15 10:51:22,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:51:22,712 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-15 10:51:22,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2023-02-15 10:51:22,781 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-02-15 10:51:22,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2023-02-15 10:51:22,810 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:51:22,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:51:22,837 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:51:22,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:51:22,870 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-15 10:51:22,870 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 60 [2023-02-15 10:51:22,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:22,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:22,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 10:51:22,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:22,960 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:51:22,970 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:51:22,975 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:51:23,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 15 [2023-02-15 10:51:23,049 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:51:23,060 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:51:23,061 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 27 [2023-02-15 10:51:23,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-02-15 10:51:23,641 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:51:24,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:51:24,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 257 treesize of output 253 [2023-02-15 10:51:24,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:51:24,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 282 [2023-02-15 10:51:24,200 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 26 [2023-02-15 10:51:24,211 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 26 [2023-02-15 10:51:24,220 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 26 [2023-02-15 10:51:24,227 INFO L350 Elim1Store]: Elim1 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 94 treesize of output 88 [2023-02-15 10:51:24,243 INFO L350 Elim1Store]: Elim1 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 90 treesize of output 76 [2023-02-15 10:51:24,290 INFO L350 Elim1Store]: Elim1 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 29 [2023-02-15 10:51:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:51:24,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:51:24,644 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2023-02-15 10:51:24,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 79 [2023-02-15 10:51:24,652 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:51:24,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2023-02-15 10:51:24,657 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 9 [2023-02-15 10:51:24,751 INFO L321 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2023-02-15 10:51:24,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 1 [2023-02-15 10:51:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:51:24,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715181286] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:51:24,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:51:24,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2023-02-15 10:51:24,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224801879] [2023-02-15 10:51:24,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:51:24,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 10:51:24,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:51:24,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 10:51:24,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2023-02-15 10:51:24,914 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 28 states, 25 states have (on average 2.04) internal successors, (51), 27 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 10:51:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:51:27,337 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2023-02-15 10:51:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 10:51:27,338 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.04) internal successors, (51), 27 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2023-02-15 10:51:27,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:51:27,339 INFO L225 Difference]: With dead ends: 111 [2023-02-15 10:51:27,339 INFO L226 Difference]: Without dead ends: 109 [2023-02-15 10:51:27,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=258, Invalid=1298, Unknown=4, NotChecked=0, Total=1560 [2023-02-15 10:51:27,340 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 118 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:51:27,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 525 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 798 Invalid, 2 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 10:51:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-15 10:51:27,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2023-02-15 10:51:27,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 66 states have internal predecessors, (85), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 10:51:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2023-02-15 10:51:27,372 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 21 [2023-02-15 10:51:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:51:27,373 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2023-02-15 10:51:27,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.04) internal successors, (51), 27 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 10:51:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2023-02-15 10:51:27,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 10:51:27,376 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:51:27,376 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] [2023-02-15 10:51:27,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 10:51:27,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:51:27,582 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:51:27,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:51:27,588 INFO L85 PathProgramCache]: Analyzing trace with hash -522334197, now seen corresponding path program 1 times [2023-02-15 10:51:27,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:51:27,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282603466] [2023-02-15 10:51:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:51:27,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:51:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:27,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 10:51:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:51:27,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:51:27,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282603466] [2023-02-15 10:51:27,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282603466] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:51:27,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:51:27,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:51:27,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530434623] [2023-02-15 10:51:27,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:51:27,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:51:27,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:51:27,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:51:27,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:51:27,852 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 10:51:28,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:51:28,040 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2023-02-15 10:51:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 10:51:28,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-02-15 10:51:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:51:28,041 INFO L225 Difference]: With dead ends: 93 [2023-02-15 10:51:28,041 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 10:51:28,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:51:28,041 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:51:28,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 175 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:51:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 10:51:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2023-02-15 10:51:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 66 states have internal predecessors, (83), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 10:51:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2023-02-15 10:51:28,052 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 22 [2023-02-15 10:51:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:51:28,053 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2023-02-15 10:51:28,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 10:51:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2023-02-15 10:51:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 10:51:28,054 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:51:28,054 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:51:28,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 10:51:28,054 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:51:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:51:28,055 INFO L85 PathProgramCache]: Analyzing trace with hash 207855267, now seen corresponding path program 2 times [2023-02-15 10:51:28,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:51:28,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458753989] [2023-02-15 10:51:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:51:28,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:51:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:51:28,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:51:28,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458753989] [2023-02-15 10:51:28,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458753989] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:51:28,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056417811] [2023-02-15 10:51:28,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:51:28,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:51:28,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:51:28,359 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) [2023-02-15 10:51:28,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 10:51:28,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:51:28,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:51:28,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 10:51:28,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:51:28,552 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 10:51:28,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 10:51:28,588 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-02-15 10:51:28,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-02-15 10:51:28,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:51:28,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:51:28,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-02-15 10:51:28,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:28,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:51:28,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:28,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:51:28,656 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:51:28,657 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 15 [2023-02-15 10:51:28,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 10:51:28,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 10:51:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 10:51:28,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:51:28,762 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#new_packet~0#1.base_24| Int) (v_ArrVal_1493 Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_38| Int)) (or (not (= (select (store (store |c_#valid| |c_ULTIMATE.start_main_~#new_packet~0#1.base| v_ArrVal_1493) |v_ULTIMATE.start_main_~#new_packet~0#1.base_24| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_38|) 0)) (forall ((v_ArrVal_1495 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_receive_~#packet~0#1.base_38| v_ArrVal_1495) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) 0)))) (forall ((|v_ULTIMATE.start_main_~#new_packet~0#1.base_24| Int) (v_ArrVal_1493 Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_38| Int)) (or (forall ((v_ArrVal_1499 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_receive_~#packet~0#1.base_38| v_ArrVal_1499) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) 0)) (not (= (select (store (store |c_#valid| |c_ULTIMATE.start_main_~#new_packet~0#1.base| v_ArrVal_1493) |v_ULTIMATE.start_main_~#new_packet~0#1.base_24| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_38|) 0))))) is different from false [2023-02-15 10:51:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 3 not checked. [2023-02-15 10:51:29,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056417811] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:51:29,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:51:29,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-02-15 10:51:29,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773292381] [2023-02-15 10:51:29,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:51:29,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 10:51:29,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:51:29,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 10:51:29,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=56, Unknown=2, NotChecked=16, Total=110 [2023-02-15 10:51:29,006 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:51:29,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:51:29,341 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2023-02-15 10:51:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 10:51:29,342 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-15 10:51:29,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:51:29,342 INFO L225 Difference]: With dead ends: 93 [2023-02-15 10:51:29,342 INFO L226 Difference]: Without dead ends: 77 [2023-02-15 10:51:29,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=68, Unknown=2, NotChecked=18, Total=132 [2023-02-15 10:51:29,343 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:51:29,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 246 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2023-02-15 10:51:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-15 10:51:29,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2023-02-15 10:51:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 59 states have internal predecessors, (74), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 10:51:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2023-02-15 10:51:29,356 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 21 [2023-02-15 10:51:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:51:29,357 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2023-02-15 10:51:29,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:51:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2023-02-15 10:51:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 10:51:29,358 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:51:29,358 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] [2023-02-15 10:51:29,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 10:51:29,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:51:29,564 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:51:29,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:51:29,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1270982129, now seen corresponding path program 1 times [2023-02-15 10:51:29,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:51:29,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562696876] [2023-02-15 10:51:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:51:29,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:51:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:29,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 10:51:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:51:30,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:51:30,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562696876] [2023-02-15 10:51:30,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562696876] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:51:30,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684736342] [2023-02-15 10:51:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:51:30,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:51:30,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:51:30,164 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:51:30,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 10:51:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:30,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 10:51:30,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:51:30,436 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 10 [2023-02-15 10:51:30,538 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-02-15 10:51:30,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2023-02-15 10:51:30,569 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:51:30,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:51:30,594 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:51:30,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:51:30,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:30,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:30,643 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-15 10:51:30,643 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 60 [2023-02-15 10:51:30,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:30,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 10:51:30,709 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:51:30,720 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:51:30,741 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:51:30,741 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 27 [2023-02-15 10:51:30,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-02-15 10:51:30,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:30,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 23 [2023-02-15 10:51:30,776 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:51:30,977 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 26 [2023-02-15 10:51:30,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 10:51:31,009 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 27 [2023-02-15 10:51:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:51:31,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:51:31,253 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2023-02-15 10:51:31,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 92 [2023-02-15 10:51:31,260 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:51:31,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 62 [2023-02-15 10:51:31,264 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2023-02-15 10:51:31,349 INFO L321 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2023-02-15 10:51:31,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 1 [2023-02-15 10:51:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:51:31,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684736342] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:51:31,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:51:31,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 22 [2023-02-15 10:51:31,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327264689] [2023-02-15 10:51:31,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:51:31,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 10:51:31,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:51:31,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 10:51:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-02-15 10:51:31,422 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 22 states, 19 states have (on average 2.526315789473684) internal successors, (48), 21 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 10:51:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:51:32,128 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2023-02-15 10:51:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 10:51:32,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.526315789473684) internal successors, (48), 21 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-02-15 10:51:32,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:51:32,129 INFO L225 Difference]: With dead ends: 91 [2023-02-15 10:51:32,129 INFO L226 Difference]: Without dead ends: 89 [2023-02-15 10:51:32,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2023-02-15 10:51:32,130 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 146 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 10:51:32,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 421 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 10:51:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-15 10:51:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2023-02-15 10:51:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 68 states have internal predecessors, (86), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 10:51:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2023-02-15 10:51:32,144 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 23 [2023-02-15 10:51:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:51:32,144 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2023-02-15 10:51:32,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.526315789473684) internal successors, (48), 21 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 10:51:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2023-02-15 10:51:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 10:51:32,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:51:32,145 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] [2023-02-15 10:51:32,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 10:51:32,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 10:51:32,351 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:51:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:51:32,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1270980207, now seen corresponding path program 1 times [2023-02-15 10:51:32,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:51:32,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710013814] [2023-02-15 10:51:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:51:32,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:51:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:32,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 10:51:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:51:33,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:51:33,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710013814] [2023-02-15 10:51:33,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710013814] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:51:33,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438302331] [2023-02-15 10:51:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:51:33,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:51:33,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:51:33,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:51:33,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 10:51:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:51:33,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-15 10:51:33,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:51:33,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-02-15 10:51:33,584 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-15 10:51:33,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2023-02-15 10:51:33,637 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-02-15 10:51:33,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2023-02-15 10:51:33,663 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:51:33,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:51:33,688 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:51:33,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:51:33,720 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-15 10:51:33,720 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 60 [2023-02-15 10:51:33,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:33,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:33,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:51:33,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 10:51:33,801 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:51:33,823 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:51:33,876 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:51:33,876 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 23 [2023-02-15 10:51:33,880 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:51:33,915 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-15 10:51:33,915 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 102 [2023-02-15 10:51:33,917 INFO L350 Elim1Store]: Elim1 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 90 treesize of output 70 [2023-02-15 10:51:34,243 INFO L350 Elim1Store]: Elim1 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 63 treesize of output 35 [2023-02-15 10:51:34,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:34,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:51:34,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2023-02-15 10:51:34,251 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-02-15 10:51:34,261 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 21 [2023-02-15 10:51:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:51:34,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:51:34,598 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2023-02-15 10:51:34,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 79 [2023-02-15 10:51:34,605 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:51:34,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2023-02-15 10:51:34,609 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 9 [2023-02-15 10:51:34,687 INFO L321 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2023-02-15 10:51:34,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 1 [2023-02-15 10:51:34,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:51:34,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2660 treesize of output 2588 [2023-02-15 10:53:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:53:42,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438302331] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:53:42,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:53:42,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2023-02-15 10:53:42,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129547780] [2023-02-15 10:53:42,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:53:42,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 10:53:42,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:53:42,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 10:53:42,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=745, Unknown=2, NotChecked=0, Total=870 [2023-02-15 10:53:42,353 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 30 states, 27 states have (on average 2.0) internal successors, (54), 29 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 10:53:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:53:43,433 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2023-02-15 10:53:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 10:53:43,433 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.0) internal successors, (54), 29 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-02-15 10:53:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:53:43,434 INFO L225 Difference]: With dead ends: 116 [2023-02-15 10:53:43,434 INFO L226 Difference]: Without dead ends: 104 [2023-02-15 10:53:43,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=251, Invalid=1225, Unknown=6, NotChecked=0, Total=1482 [2023-02-15 10:53:43,435 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 248 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 10:53:43,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 547 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 10:53:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-15 10:53:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 77. [2023-02-15 10:53:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 68 states have internal predecessors, (85), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 10:53:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2023-02-15 10:53:43,454 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 23 [2023-02-15 10:53:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:53:43,454 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2023-02-15 10:53:43,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.0) internal successors, (54), 29 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 10:53:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2023-02-15 10:53:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 10:53:43,456 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:53:43,456 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:53:43,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 10:53:43,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 10:53:43,663 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:53:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:53:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1942876957, now seen corresponding path program 1 times [2023-02-15 10:53:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:53:43,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763650884] [2023-02-15 10:53:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:53:43,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:53:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:53:44,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 10:53:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:53:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:53:45,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:53:45,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763650884] [2023-02-15 10:53:45,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763650884] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:53:45,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919186740] [2023-02-15 10:53:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:53:45,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:53:45,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:53:45,015 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:53:45,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 10:53:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:53:45,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 99 conjunts are in the unsatisfiable core [2023-02-15 10:53:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:53:45,246 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 10:53:45,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-02-15 10:53:45,296 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-02-15 10:53:45,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-02-15 10:53:45,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-15 10:53:45,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 10:53:45,451 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-02-15 10:53:45,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2023-02-15 10:53:45,476 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:53:45,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:53:45,501 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 10:53:45,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-15 10:53:45,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:53:45,540 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-15 10:53:45,540 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 60 [2023-02-15 10:53:45,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:53:45,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 10:53:45,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 10:53:45,608 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:53:45,622 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:53:45,638 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:53:45,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 15 [2023-02-15 10:53:45,699 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-15 10:53:45,758 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-15 10:53:45,758 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 297 treesize of output 213 [2023-02-15 10:53:45,761 INFO L350 Elim1Store]: Elim1 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 201 treesize of output 159 [2023-02-15 10:53:46,309 INFO L321 Elim1Store]: treesize reduction 527, result has 20.8 percent of original size [2023-02-15 10:53:46,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 419 treesize of output 801 [2023-02-15 10:53:52,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:53:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:53:52,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:53:52,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:53:52,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:53:52,797 INFO L321 Elim1Store]: treesize reduction 124, result has 27.9 percent of original size [2023-02-15 10:53:52,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 870 treesize of output 1207 [2023-02-15 10:53:52,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:53:52,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:53:52,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:53:52,936 INFO L321 Elim1Store]: treesize reduction 136, result has 27.7 percent of original size [2023-02-15 10:53:52,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 16 case distinctions, treesize of input 312 treesize of output 330 [2023-02-15 10:53:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:53:53,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 10:53:53,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:53:53,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-02-15 10:53:53,834 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:53:53,835 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 15 [2023-02-15 10:53:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:53:53,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-15 10:53:53,894 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 20 [2023-02-15 10:53:53,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 10:53:53,922 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 25 [2023-02-15 10:53:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:53:53,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:53:54,594 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2023-02-15 10:53:54,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 104 treesize of output 126 [2023-02-15 10:53:54,613 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:53:54,748 INFO L321 Elim1Store]: treesize reduction 66, result has 62.7 percent of original size [2023-02-15 10:53:54,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 488 treesize of output 538 [2023-02-15 10:53:54,760 INFO L350 Elim1Store]: Elim1 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 482 treesize of output 456 [2023-02-15 10:53:54,774 INFO L350 Elim1Store]: Elim1 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 385 treesize of output 319 [2023-02-15 10:53:54,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:53:54,792 INFO L350 Elim1Store]: Elim1 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 332 treesize of output 322 [2023-02-15 10:53:54,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:53:54,812 INFO L350 Elim1Store]: Elim1 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 258 treesize of output 243 [2023-02-15 10:53:55,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919186740] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:53:55,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:53:55,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2023-02-15 10:53:55,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145393788] [2023-02-15 10:53:55,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:53:55,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 10:53:55,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:53:55,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 10:53:55,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=714, Unknown=3, NotChecked=0, Total=812 [2023-02-15 10:53:55,451 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 10:53:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:53:58,914 INFO L93 Difference]: Finished difference Result 126 states and 162 transitions. [2023-02-15 10:53:58,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 10:53:58,915 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-15 10:53:58,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:53:58,917 INFO L225 Difference]: With dead ends: 126 [2023-02-15 10:53:58,917 INFO L226 Difference]: Without dead ends: 103 [2023-02-15 10:53:58,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=328, Invalid=1739, Unknown=3, NotChecked=0, Total=2070 [2023-02-15 10:53:58,922 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 142 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-15 10:53:58,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 361 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 804 Invalid, 2 Unknown, 0 Unchecked, 1.8s Time] [2023-02-15 10:53:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-15 10:53:58,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2023-02-15 10:53:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 75 states have internal predecessors, (95), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 10:53:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2023-02-15 10:53:58,957 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 25 [2023-02-15 10:53:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:53:58,958 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2023-02-15 10:53:58,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 10:53:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2023-02-15 10:53:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 10:53:58,958 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:53:58,959 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:53:58,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-15 10:53:59,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 10:53:59,167 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:53:59,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:53:59,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1557464423, now seen corresponding path program 1 times [2023-02-15 10:53:59,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:53:59,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028557851] [2023-02-15 10:53:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:53:59,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:53:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:53:59,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 10:53:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat