./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 13:04:31,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 13:04:31,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 13:04:31,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 13:04:31,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 13:04:31,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 13:04:31,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 13:04:31,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 13:04:31,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 13:04:31,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 13:04:31,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 13:04:31,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 13:04:31,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 13:04:31,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 13:04:31,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 13:04:31,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 13:04:31,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 13:04:31,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 13:04:31,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 13:04:31,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 13:04:31,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 13:04:31,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 13:04:31,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 13:04:31,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 13:04:31,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 13:04:31,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 13:04:31,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 13:04:31,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 13:04:31,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 13:04:31,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 13:04:31,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 13:04:31,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 13:04:31,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 13:04:31,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 13:04:31,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 13:04:31,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 13:04:31,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 13:04:31,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 13:04:31,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 13:04:31,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 13:04:31,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 13:04:31,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 13:04:31,742 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 13:04:31,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 13:04:31,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 13:04:31,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 13:04:31,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 13:04:31,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 13:04:31,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 13:04:31,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 13:04:31,745 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 13:04:31,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 13:04:31,746 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 13:04:31,746 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 13:04:31,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 13:04:31,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 13:04:31,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 13:04:31,747 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 13:04:31,747 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 13:04:31,748 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 13:04:31,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 13:04:31,748 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 13:04:31,748 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 13:04:31,748 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 13:04:31,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 13:04:31,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 13:04:31,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 13:04:31,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 13:04:31,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 13:04:31,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 13:04:31,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 13:04:31,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 13:04:31,751 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 13:04:31,751 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 13:04:31,751 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 13:04:31,751 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 13:04:31,751 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2023-02-15 13:04:32,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 13:04:32,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 13:04:32,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 13:04:32,038 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 13:04:32,038 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 13:04:32,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-02-15 13:04:33,207 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 13:04:33,399 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 13:04:33,400 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-02-15 13:04:33,404 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f324f9bc0/58d66a4e50c5427eb093338f4dc6bbde/FLAG7b7490bae [2023-02-15 13:04:33,416 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f324f9bc0/58d66a4e50c5427eb093338f4dc6bbde [2023-02-15 13:04:33,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 13:04:33,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 13:04:33,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 13:04:33,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 13:04:33,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 13:04:33,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e81c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33, skipping insertion in model container [2023-02-15 13:04:33,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 13:04:33,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 13:04:33,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 13:04:33,598 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 13:04:33,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 13:04:33,628 INFO L208 MainTranslator]: Completed translation [2023-02-15 13:04:33,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33 WrapperNode [2023-02-15 13:04:33,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 13:04:33,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 13:04:33,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 13:04:33,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 13:04:33,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,659 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2023-02-15 13:04:33,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 13:04:33,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 13:04:33,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 13:04:33,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 13:04:33,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,694 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 13:04:33,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 13:04:33,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 13:04:33,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 13:04:33,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33" (1/1) ... [2023-02-15 13:04:33,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 13:04:33,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:33,726 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 13:04:33,745 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 13:04:33,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 13:04:33,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 13:04:33,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 13:04:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 13:04:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 13:04:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 13:04:33,823 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 13:04:33,825 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 13:04:33,977 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 13:04:33,982 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 13:04:33,982 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 13:04:33,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:04:33 BoogieIcfgContainer [2023-02-15 13:04:33,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 13:04:33,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 13:04:33,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 13:04:33,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 13:04:33,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:04:33" (1/3) ... [2023-02-15 13:04:33,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@524c8475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:04:33, skipping insertion in model container [2023-02-15 13:04:33,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:04:33" (2/3) ... [2023-02-15 13:04:33,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@524c8475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:04:33, skipping insertion in model container [2023-02-15 13:04:33,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:04:33" (3/3) ... [2023-02-15 13:04:33,990 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2023-02-15 13:04:34,004 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 13:04:34,004 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-15 13:04:34,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 13:04:34,064 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@1aa9d7ee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 13:04:34,064 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-15 13:04:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 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 13:04:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-15 13:04:34,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:34,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-15 13:04:34,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:34,077 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2023-02-15 13:04:34,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:34,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815802512] [2023-02-15 13:04:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:34,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:34,314 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 13:04:34,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815802512] [2023-02-15 13:04:34,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815802512] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:04:34,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:04:34,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:04:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349556168] [2023-02-15 13:04:34,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:04:34,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:04:34,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:34,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:04:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:04:34,354 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 13:04:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:34,419 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-02-15 13:04:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:04:34,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2023-02-15 13:04:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:34,427 INFO L225 Difference]: With dead ends: 59 [2023-02-15 13:04:34,428 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 13:04:34,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 13:04:34,432 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:34,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:04:34,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 13:04:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2023-02-15 13:04:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 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 13:04:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-02-15 13:04:34,460 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2023-02-15 13:04:34,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:34,461 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-02-15 13:04:34,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 13:04:34,461 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-02-15 13:04:34,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 13:04:34,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:34,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 13:04:34,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 13:04:34,463 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:34,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:34,465 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2023-02-15 13:04:34,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:34,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070703877] [2023-02-15 13:04:34,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:34,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:34,575 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 13:04:34,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:34,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070703877] [2023-02-15 13:04:34,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070703877] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:04:34,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:04:34,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:04:34,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902739732] [2023-02-15 13:04:34,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:04:34,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:04:34,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:34,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:04:34,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:04:34,594 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 13:04:34,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:34,625 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-02-15 13:04:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:04:34,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-02-15 13:04:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:34,626 INFO L225 Difference]: With dead ends: 58 [2023-02-15 13:04:34,626 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 13:04:34,627 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 13:04:34,628 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:34,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:04:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 13:04:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2023-02-15 13:04:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 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 13:04:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-15 13:04:34,638 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2023-02-15 13:04:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:34,639 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-15 13:04:34,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 13:04:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-15 13:04:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 13:04:34,641 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:34,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 13:04:34,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 13:04:34,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:34,648 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2023-02-15 13:04:34,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:34,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269326952] [2023-02-15 13:04:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:34,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:34,755 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 13:04:34,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:34,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269326952] [2023-02-15 13:04:34,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269326952] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:04:34,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:04:34,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:04:34,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586903564] [2023-02-15 13:04:34,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:04:34,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:04:34,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:04:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:04:34,761 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 13:04:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:34,802 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-02-15 13:04:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:04:34,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2023-02-15 13:04:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:34,803 INFO L225 Difference]: With dead ends: 32 [2023-02-15 13:04:34,804 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 13:04:34,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 13:04:34,805 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:34,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:04:34,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 13:04:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-15 13:04:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 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 13:04:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-15 13:04:34,809 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2023-02-15 13:04:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:34,809 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-15 13:04:34,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 13:04:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-15 13:04:34,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 13:04:34,810 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:34,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 13:04:34,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 13:04:34,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:34,811 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2023-02-15 13:04:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:34,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335502116] [2023-02-15 13:04:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:34,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:34,953 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 13:04:34,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335502116] [2023-02-15 13:04:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335502116] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:04:34,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:04:34,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:04:34,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131661251] [2023-02-15 13:04:34,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:04:34,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:04:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:04:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:04:34,957 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 13:04:35,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:35,027 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-02-15 13:04:35,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:04:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2023-02-15 13:04:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:35,030 INFO L225 Difference]: With dead ends: 55 [2023-02-15 13:04:35,030 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 13:04:35,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 13:04:35,032 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:35,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:04:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 13:04:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2023-02-15 13:04:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 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 13:04:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-15 13:04:35,043 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2023-02-15 13:04:35,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:35,043 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-15 13:04:35,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 13:04:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-15 13:04:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 13:04:35,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:35,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:35,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 13:04:35,045 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:35,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:35,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2023-02-15 13:04:35,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:35,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989000441] [2023-02-15 13:04:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:35,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:35,110 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 13:04:35,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:35,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989000441] [2023-02-15 13:04:35,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989000441] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:04:35,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:04:35,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:04:35,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730251774] [2023-02-15 13:04:35,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:04:35,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:04:35,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:35,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:04:35,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:04:35,115 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 13:04:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:35,165 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2023-02-15 13:04:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:04:35,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2023-02-15 13:04:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:35,167 INFO L225 Difference]: With dead ends: 60 [2023-02-15 13:04:35,167 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 13:04:35,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 13:04:35,168 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:35,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:04:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 13:04:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2023-02-15 13:04:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 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 13:04:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-02-15 13:04:35,172 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2023-02-15 13:04:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:35,173 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-02-15 13:04:35,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 13:04:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-02-15 13:04:35,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 13:04:35,174 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:35,174 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:35,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 13:04:35,174 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:35,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:35,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2023-02-15 13:04:35,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:35,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925028482] [2023-02-15 13:04:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:35,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:35,233 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 13:04:35,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:35,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925028482] [2023-02-15 13:04:35,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925028482] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:35,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126229391] [2023-02-15 13:04:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:35,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:35,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:35,239 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 13:04:35,241 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 13:04:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:35,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 13:04:35,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:35,344 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 13:04:35,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:35,382 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 13:04:35,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126229391] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:35,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:35,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-02-15 13:04:35,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277303894] [2023-02-15 13:04:35,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:35,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:04:35,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:35,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:04:35,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:04:35,387 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 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 13:04:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:35,488 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2023-02-15 13:04:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:04:35,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 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 10 [2023-02-15 13:04:35,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:35,496 INFO L225 Difference]: With dead ends: 130 [2023-02-15 13:04:35,501 INFO L226 Difference]: Without dead ends: 130 [2023-02-15 13:04:35,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:04:35,502 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 164 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:35,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 145 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:04:35,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-15 13:04:35,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2023-02-15 13:04:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 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 13:04:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2023-02-15 13:04:35,508 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2023-02-15 13:04:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:35,508 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2023-02-15 13:04:35,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 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 13:04:35,509 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2023-02-15 13:04:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 13:04:35,509 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:35,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:35,521 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 13:04:35,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-15 13:04:35,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:35,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:35,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2023-02-15 13:04:35,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:35,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226642437] [2023-02-15 13:04:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:35,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:04:35,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226642437] [2023-02-15 13:04:35,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226642437] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695523858] [2023-02-15 13:04:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:35,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:35,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:35,895 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 13:04:35,921 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 13:04:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:35,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 13:04:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:36,002 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:04:36,002 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 13:04:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:04:36,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:04:36,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695523858] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:36,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:36,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-15 13:04:36,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169280982] [2023-02-15 13:04:36,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:36,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 13:04:36,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:36,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 13:04:36,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:04:36,150 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 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 13:04:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:36,320 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2023-02-15 13:04:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 13:04:36,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 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 13:04:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:36,324 INFO L225 Difference]: With dead ends: 129 [2023-02-15 13:04:36,324 INFO L226 Difference]: Without dead ends: 129 [2023-02-15 13:04:36,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-02-15 13:04:36,326 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 351 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:36,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 99 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:04:36,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-15 13:04:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2023-02-15 13:04:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 states have internal predecessors, (56), 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 13:04:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-02-15 13:04:36,345 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2023-02-15 13:04:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:36,345 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-02-15 13:04:36,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 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 13:04:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-02-15 13:04:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 13:04:36,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:36,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:36,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 13:04:36,551 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,SelfDestructingSolverStorable6 [2023-02-15 13:04:36,552 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:36,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2023-02-15 13:04:36,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:36,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513872609] [2023-02-15 13:04:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:36,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:04:36,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:36,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513872609] [2023-02-15 13:04:36,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513872609] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:36,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198677494] [2023-02-15 13:04:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:36,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:36,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:36,618 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 13:04:36,620 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 13:04:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:36,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 13:04:36,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:04:36,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:04:36,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198677494] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:36,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:36,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-15 13:04:36,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813220388] [2023-02-15 13:04:36,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:36,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 13:04:36,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:36,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 13:04:36,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:04:36,729 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 13:04:36,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:36,845 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2023-02-15 13:04:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:04:36,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 12 [2023-02-15 13:04:36,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:36,846 INFO L225 Difference]: With dead ends: 88 [2023-02-15 13:04:36,846 INFO L226 Difference]: Without dead ends: 88 [2023-02-15 13:04:36,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-02-15 13:04:36,847 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:36,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 52 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:04:36,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-15 13:04:36,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2023-02-15 13:04:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 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 13:04:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-02-15 13:04:36,851 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2023-02-15 13:04:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:36,851 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-02-15 13:04:36,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 13:04:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-02-15 13:04:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 13:04:36,852 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:36,852 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:36,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 13:04:37,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:37,058 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:37,059 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2023-02-15 13:04:37,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:37,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508531336] [2023-02-15 13:04:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:37,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:04:37,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:37,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508531336] [2023-02-15 13:04:37,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508531336] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:04:37,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:04:37,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:04:37,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033006764] [2023-02-15 13:04:37,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:04:37,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:04:37,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:37,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:04:37,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:04:37,162 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 13:04:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:37,179 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-02-15 13:04:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:04:37,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 17 [2023-02-15 13:04:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:37,180 INFO L225 Difference]: With dead ends: 46 [2023-02-15 13:04:37,180 INFO L226 Difference]: Without dead ends: 46 [2023-02-15 13:04:37,180 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 13:04:37,182 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:37,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:04:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-15 13:04:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-02-15 13:04:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:04:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-02-15 13:04:37,187 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2023-02-15 13:04:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:37,188 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-02-15 13:04:37,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 13:04:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-02-15 13:04:37,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 13:04:37,189 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:37,189 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:37,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 13:04:37,190 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:37,190 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2023-02-15 13:04:37,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:37,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216830034] [2023-02-15 13:04:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:37,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 13:04:37,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:37,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216830034] [2023-02-15 13:04:37,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216830034] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:04:37,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:04:37,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:04:37,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222081770] [2023-02-15 13:04:37,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:04:37,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:04:37,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:37,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:04:37,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:04:37,317 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 13:04:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:37,345 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2023-02-15 13:04:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:04:37,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 17 [2023-02-15 13:04:37,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:37,347 INFO L225 Difference]: With dead ends: 76 [2023-02-15 13:04:37,347 INFO L226 Difference]: Without dead ends: 76 [2023-02-15 13:04:37,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:04:37,347 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:37,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:04:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-15 13:04:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2023-02-15 13:04:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:04:37,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2023-02-15 13:04:37,363 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2023-02-15 13:04:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:37,364 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2023-02-15 13:04:37,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 13:04:37,364 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2023-02-15 13:04:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 13:04:37,365 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:37,365 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:37,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 13:04:37,365 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:37,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:37,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2023-02-15 13:04:37,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:37,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880437000] [2023-02-15 13:04:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:37,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 13:04:37,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:37,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880437000] [2023-02-15 13:04:37,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880437000] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:37,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653457194] [2023-02-15 13:04:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:37,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:37,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:37,440 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 13:04:37,451 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 13:04:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 13:04:37,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 13:04:37,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:37,637 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 23 treesize of output 19 [2023-02-15 13:04:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 13:04:37,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653457194] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:37,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:37,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-15 13:04:37,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063720697] [2023-02-15 13:04:37,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:37,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 13:04:37,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:37,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 13:04:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:04:37,698 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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 13:04:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:37,774 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-02-15 13:04:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:04:37,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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 23 [2023-02-15 13:04:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:37,775 INFO L225 Difference]: With dead ends: 80 [2023-02-15 13:04:37,775 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 13:04:37,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 13:04:37,776 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:37,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 41 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:04:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 13:04:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2023-02-15 13:04:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 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 13:04:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2023-02-15 13:04:37,782 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2023-02-15 13:04:37,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:37,782 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2023-02-15 13:04:37,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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 13:04:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2023-02-15 13:04:37,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 13:04:37,783 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:37,783 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2023-02-15 13:04:37,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 13:04:37,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:37,990 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:37,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:37,990 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2023-02-15 13:04:37,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:37,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206561765] [2023-02-15 13:04:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:37,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:04:38,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:38,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206561765] [2023-02-15 13:04:38,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206561765] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:38,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895870680] [2023-02-15 13:04:38,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 13:04:38,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:38,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:38,080 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 13:04:38,082 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 13:04:38,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 13:04:38,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:04:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 13:04:38,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 13:04:38,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:04:38,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895870680] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:04:38,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:04:38,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-02-15 13:04:38,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536683734] [2023-02-15 13:04:38,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:04:38,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:04:38,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:38,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:04:38,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:04:38,206 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 13:04:38,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:38,280 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2023-02-15 13:04:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:04:38,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 25 [2023-02-15 13:04:38,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:38,281 INFO L225 Difference]: With dead ends: 86 [2023-02-15 13:04:38,281 INFO L226 Difference]: Without dead ends: 86 [2023-02-15 13:04:38,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-02-15 13:04:38,282 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:38,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 44 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:04:38,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-15 13:04:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2023-02-15 13:04:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:04:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2023-02-15 13:04:38,290 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2023-02-15 13:04:38,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:38,291 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2023-02-15 13:04:38,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 13:04:38,291 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2023-02-15 13:04:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 13:04:38,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:38,293 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:38,300 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 13:04:38,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 13:04:38,497 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:38,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:38,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2023-02-15 13:04:38,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:38,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563854933] [2023-02-15 13:04:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:38,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 13:04:38,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:38,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563854933] [2023-02-15 13:04:38,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563854933] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:38,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779923760] [2023-02-15 13:04:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:38,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:38,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:38,604 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 13:04:38,620 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 13:04:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:38,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 13:04:38,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:04:38,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:04:38,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779923760] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:38,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:38,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-02-15 13:04:38,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7750568] [2023-02-15 13:04:38,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:38,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 13:04:38,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 13:04:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:04:38,785 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 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 13:04:38,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:38,989 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2023-02-15 13:04:38,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:04:38,989 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 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 26 [2023-02-15 13:04:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:38,990 INFO L225 Difference]: With dead ends: 152 [2023-02-15 13:04:38,990 INFO L226 Difference]: Without dead ends: 152 [2023-02-15 13:04:38,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2023-02-15 13:04:38,991 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:38,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 112 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:04:38,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-15 13:04:38,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2023-02-15 13:04:38,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.2109375) internal successors, (155), 132 states have internal predecessors, (155), 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 13:04:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2023-02-15 13:04:38,994 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 26 [2023-02-15 13:04:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:38,994 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2023-02-15 13:04:38,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 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 13:04:38,994 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2023-02-15 13:04:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 13:04:38,995 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:38,995 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:39,008 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 13:04:39,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:39,196 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:39,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:39,196 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2023-02-15 13:04:39,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:39,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017342604] [2023-02-15 13:04:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:39,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 13:04:39,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:39,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017342604] [2023-02-15 13:04:39,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017342604] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:39,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849290212] [2023-02-15 13:04:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:39,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:39,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:39,333 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 13:04:39,347 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 13:04:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:39,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 13:04:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 13:04:39,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 13:04:39,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849290212] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:39,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:39,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-02-15 13:04:39,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604034152] [2023-02-15 13:04:39,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:39,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 13:04:39,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 13:04:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-02-15 13:04:39,552 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:04:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:39,718 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2023-02-15 13:04:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 13:04:39,719 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-15 13:04:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:39,719 INFO L225 Difference]: With dead ends: 136 [2023-02-15 13:04:39,719 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 13:04:39,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2023-02-15 13:04:39,720 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:39,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 75 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:04:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 13:04:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2023-02-15 13:04:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.1875) internal successors, (152), 132 states have internal predecessors, (152), 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 13:04:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2023-02-15 13:04:39,723 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 34 [2023-02-15 13:04:39,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:39,723 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2023-02-15 13:04:39,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:04:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2023-02-15 13:04:39,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 13:04:39,723 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:39,724 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:39,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 13:04:39,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:39,933 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:39,933 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2023-02-15 13:04:39,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:39,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187161067] [2023-02-15 13:04:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:39,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 13:04:40,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:40,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187161067] [2023-02-15 13:04:40,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187161067] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:40,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666501955] [2023-02-15 13:04:40,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 13:04:40,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:40,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:40,124 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 13:04:40,148 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 13:04:40,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 13:04:40,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:04:40,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 13:04:40,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:40,213 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:04:40,213 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 13:04:40,223 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 10 treesize of output 8 [2023-02-15 13:04:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 13:04:40,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 13:04:40,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666501955] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:40,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:40,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 10 [2023-02-15 13:04:40,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521937544] [2023-02-15 13:04:40,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:40,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 13:04:40,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:40,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 13:04:40,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-15 13:04:40,598 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 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 13:04:40,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:40,680 INFO L93 Difference]: Finished difference Result 165 states and 180 transitions. [2023-02-15 13:04:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:04:40,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 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 39 [2023-02-15 13:04:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:40,682 INFO L225 Difference]: With dead ends: 165 [2023-02-15 13:04:40,682 INFO L226 Difference]: Without dead ends: 165 [2023-02-15 13:04:40,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:04:40,683 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 53 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:40,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 84 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:04:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-15 13:04:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2023-02-15 13:04:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.1688311688311688) internal successors, (180), 158 states have internal predecessors, (180), 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 13:04:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2023-02-15 13:04:40,687 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 39 [2023-02-15 13:04:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:40,688 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2023-02-15 13:04:40,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 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 13:04:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2023-02-15 13:04:40,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 13:04:40,689 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:40,689 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:40,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 13:04:40,899 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,SelfDestructingSolverStorable14 [2023-02-15 13:04:40,899 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:40,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2023-02-15 13:04:40,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:40,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92027992] [2023-02-15 13:04:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:40,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 13:04:41,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92027992] [2023-02-15 13:04:41,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92027992] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505194690] [2023-02-15 13:04:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:41,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:41,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:41,053 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 13:04:41,061 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 13:04:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:41,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 13:04:41,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 13:04:41,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 13:04:41,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505194690] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:41,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:41,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 16 [2023-02-15 13:04:41,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362104093] [2023-02-15 13:04:41,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:41,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 13:04:41,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:41,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 13:04:41,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-02-15 13:04:41,306 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:04:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:41,541 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2023-02-15 13:04:41,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 13:04:41,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-15 13:04:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:41,542 INFO L225 Difference]: With dead ends: 159 [2023-02-15 13:04:41,542 INFO L226 Difference]: Without dead ends: 159 [2023-02-15 13:04:41,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-02-15 13:04:41,543 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 160 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:41,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 93 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:04:41,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-15 13:04:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2023-02-15 13:04:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.1496598639455782) internal successors, (169), 151 states have internal predecessors, (169), 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 13:04:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2023-02-15 13:04:41,546 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 42 [2023-02-15 13:04:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:41,547 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2023-02-15 13:04:41,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:04:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2023-02-15 13:04:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 13:04:41,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:41,548 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-02-15 13:04:41,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 13:04:41,748 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,SelfDestructingSolverStorable15 [2023-02-15 13:04:41,748 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:41,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:41,749 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2023-02-15 13:04:41,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:41,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496783603] [2023-02-15 13:04:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:41,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 117 proven. 102 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 13:04:42,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:42,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496783603] [2023-02-15 13:04:42,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496783603] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:42,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108513207] [2023-02-15 13:04:42,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 13:04:42,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:42,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:42,010 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 13:04:42,015 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 13:04:42,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 13:04:42,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:04:42,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 13:04:42,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 13:04:42,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 13:04:42,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108513207] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:42,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:42,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 20 [2023-02-15 13:04:42,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752917019] [2023-02-15 13:04:42,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:42,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 13:04:42,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:42,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 13:04:42,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-02-15 13:04:42,410 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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 13:04:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:42,977 INFO L93 Difference]: Finished difference Result 312 states and 328 transitions. [2023-02-15 13:04:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 13:04:42,977 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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 64 [2023-02-15 13:04:42,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:42,979 INFO L225 Difference]: With dead ends: 312 [2023-02-15 13:04:42,979 INFO L226 Difference]: Without dead ends: 312 [2023-02-15 13:04:42,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=1381, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 13:04:42,980 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 532 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:42,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 150 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:04:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-02-15 13:04:42,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 207. [2023-02-15 13:04:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.113861386138614) internal successors, (225), 206 states have internal predecessors, (225), 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 13:04:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 225 transitions. [2023-02-15 13:04:42,984 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 225 transitions. Word has length 64 [2023-02-15 13:04:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:42,984 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 225 transitions. [2023-02-15 13:04:42,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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 13:04:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 225 transitions. [2023-02-15 13:04:42,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-15 13:04:42,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:42,986 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-15 13:04:42,991 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 13:04:43,191 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,SelfDestructingSolverStorable16 [2023-02-15 13:04:43,192 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:43,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:43,192 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2023-02-15 13:04:43,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:43,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605850996] [2023-02-15 13:04:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:43,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 13:04:43,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:43,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605850996] [2023-02-15 13:04:43,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605850996] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:43,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658233370] [2023-02-15 13:04:43,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 13:04:43,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:43,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:43,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:04:43,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 13:04:43,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 13:04:43,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:04:43,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 13:04:43,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 13:04:43,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 13:04:43,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658233370] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:43,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:43,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-02-15 13:04:43,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594251583] [2023-02-15 13:04:43,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:43,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 13:04:43,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:43,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 13:04:43,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-02-15 13:04:43,625 INFO L87 Difference]: Start difference. First operand 207 states and 225 transitions. Second operand has 13 states, 12 states have (on average 5.25) internal successors, (63), 13 states have internal predecessors, (63), 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 13:04:43,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:43,942 INFO L93 Difference]: Finished difference Result 492 states and 574 transitions. [2023-02-15 13:04:43,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 13:04:43,942 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.25) internal successors, (63), 13 states have internal predecessors, (63), 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 91 [2023-02-15 13:04:43,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:43,944 INFO L225 Difference]: With dead ends: 492 [2023-02-15 13:04:43,944 INFO L226 Difference]: Without dead ends: 492 [2023-02-15 13:04:43,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-02-15 13:04:43,945 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 456 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:43,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 309 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:04:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-02-15 13:04:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 265. [2023-02-15 13:04:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.1730769230769231) internal successors, (305), 264 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:04:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 305 transitions. [2023-02-15 13:04:43,950 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 305 transitions. Word has length 91 [2023-02-15 13:04:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:43,951 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 305 transitions. [2023-02-15 13:04:43,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.25) internal successors, (63), 13 states have internal predecessors, (63), 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 13:04:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 305 transitions. [2023-02-15 13:04:43,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-15 13:04:43,952 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:43,952 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:43,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 13:04:44,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 13:04:44,153 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:44,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1874012467, now seen corresponding path program 2 times [2023-02-15 13:04:44,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:44,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254752075] [2023-02-15 13:04:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:44,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 256 proven. 77 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 13:04:44,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:44,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254752075] [2023-02-15 13:04:44,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254752075] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:44,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752282599] [2023-02-15 13:04:44,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 13:04:44,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:44,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:44,465 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:04:44,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 13:04:44,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 13:04:44,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:04:44,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 13:04:44,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:45,065 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_350 Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_16| Int) (v_ArrVal_349 Int) (v_ArrVal_348 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_21| Int)) (and (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_21| v_ArrVal_350) |v_ULTIMATE.start_main_~#mask~0#1.base_16| v_ArrVal_349) |v_ULTIMATE.start_main_~#b~0#1.base_21| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_16| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_21| v_ArrVal_348) |v_ULTIMATE.start_main_~#mask~0#1.base_16|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_21|) 0))) is different from true [2023-02-15 13:04:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2023-02-15 13:04:45,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:04:45,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752282599] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:04:45,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:04:45,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2023-02-15 13:04:45,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79914093] [2023-02-15 13:04:45,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:04:45,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:04:45,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:45,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:04:45,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-02-15 13:04:45,069 INFO L87 Difference]: Start difference. First operand 265 states and 305 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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 13:04:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:45,088 INFO L93 Difference]: Finished difference Result 266 states and 305 transitions. [2023-02-15 13:04:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:04:45,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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 92 [2023-02-15 13:04:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:45,089 INFO L225 Difference]: With dead ends: 266 [2023-02-15 13:04:45,089 INFO L226 Difference]: Without dead ends: 264 [2023-02-15 13:04:45,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-02-15 13:04:45,090 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:45,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2023-02-15 13:04:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-02-15 13:04:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2023-02-15 13:04:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.1583011583011582) internal successors, (300), 263 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:04:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 300 transitions. [2023-02-15 13:04:45,096 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 300 transitions. Word has length 92 [2023-02-15 13:04:45,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:45,096 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 300 transitions. [2023-02-15 13:04:45,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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 13:04:45,096 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 300 transitions. [2023-02-15 13:04:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-15 13:04:45,097 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:45,097 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-15 13:04:45,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 13:04:45,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:45,303 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:45,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2023-02-15 13:04:45,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:45,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103261111] [2023-02-15 13:04:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:45,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 13:04:45,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:45,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103261111] [2023-02-15 13:04:45,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103261111] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:45,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139631077] [2023-02-15 13:04:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:45,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:45,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:45,653 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:04:45,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 13:04:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 13:04:45,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:45,789 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:04:45,789 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 13:04:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 13:04:46,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 13:04:46,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139631077] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:46,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:46,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-02-15 13:04:46,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224550969] [2023-02-15 13:04:46,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:46,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 13:04:46,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:46,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 13:04:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-15 13:04:46,389 INFO L87 Difference]: Start difference. First operand 264 states and 300 transitions. Second operand has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 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 13:04:46,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:46,931 INFO L93 Difference]: Finished difference Result 481 states and 526 transitions. [2023-02-15 13:04:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 13:04:46,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 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 92 [2023-02-15 13:04:46,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:46,934 INFO L225 Difference]: With dead ends: 481 [2023-02-15 13:04:46,934 INFO L226 Difference]: Without dead ends: 481 [2023-02-15 13:04:46,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-02-15 13:04:46,935 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 458 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:46,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 215 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:04:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2023-02-15 13:04:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 266. [2023-02-15 13:04:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.1187739463601531) internal successors, (292), 265 states have internal predecessors, (292), 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 13:04:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 292 transitions. [2023-02-15 13:04:46,940 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 292 transitions. Word has length 92 [2023-02-15 13:04:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:46,940 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 292 transitions. [2023-02-15 13:04:46,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 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 13:04:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 292 transitions. [2023-02-15 13:04:46,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-15 13:04:46,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:46,941 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:46,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 13:04:47,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-02-15 13:04:47,142 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:47,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2035033164, now seen corresponding path program 1 times [2023-02-15 13:04:47,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:47,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372947330] [2023-02-15 13:04:47,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:47,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 256 proven. 77 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 13:04:47,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:47,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372947330] [2023-02-15 13:04:47,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372947330] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:47,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013709261] [2023-02-15 13:04:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:47,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:47,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:47,395 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:04:47,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 13:04:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:47,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 13:04:47,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 210 proven. 106 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 13:04:47,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 210 proven. 106 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 13:04:47,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013709261] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:47,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:47,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 21 [2023-02-15 13:04:47,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567423718] [2023-02-15 13:04:47,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:47,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 13:04:47,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:47,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 13:04:47,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-02-15 13:04:47,764 INFO L87 Difference]: Start difference. First operand 266 states and 292 transitions. Second operand has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 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 13:04:48,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:48,210 INFO L93 Difference]: Finished difference Result 210 states and 228 transitions. [2023-02-15 13:04:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 13:04:48,211 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 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 93 [2023-02-15 13:04:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:48,212 INFO L225 Difference]: With dead ends: 210 [2023-02-15 13:04:48,212 INFO L226 Difference]: Without dead ends: 210 [2023-02-15 13:04:48,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 13:04:48,213 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:48,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 86 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:04:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-02-15 13:04:48,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2023-02-15 13:04:48,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.1176470588235294) internal successors, (228), 208 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:04:48,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 228 transitions. [2023-02-15 13:04:48,217 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 228 transitions. Word has length 93 [2023-02-15 13:04:48,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:48,217 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 228 transitions. [2023-02-15 13:04:48,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 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 13:04:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 228 transitions. [2023-02-15 13:04:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-15 13:04:48,218 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:48,218 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:48,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 13:04:48,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:48,419 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:48,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1008958684, now seen corresponding path program 2 times [2023-02-15 13:04:48,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:48,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515507290] [2023-02-15 13:04:48,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:48,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 279 proven. 140 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-02-15 13:04:48,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:48,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515507290] [2023-02-15 13:04:48,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515507290] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:48,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481721630] [2023-02-15 13:04:48,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 13:04:48,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:48,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:48,740 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:04:48,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 13:04:48,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 13:04:48,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:04:48,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 13:04:48,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 191 proven. 238 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-15 13:04:49,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 191 proven. 238 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-15 13:04:49,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481721630] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:49,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:49,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2023-02-15 13:04:49,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555757667] [2023-02-15 13:04:49,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:49,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 13:04:49,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:49,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 13:04:49,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-02-15 13:04:49,224 INFO L87 Difference]: Start difference. First operand 209 states and 228 transitions. Second operand has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:04:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:49,894 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2023-02-15 13:04:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 13:04:49,896 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-02-15 13:04:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:49,897 INFO L225 Difference]: With dead ends: 211 [2023-02-15 13:04:49,897 INFO L226 Difference]: Without dead ends: 211 [2023-02-15 13:04:49,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 192 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=396, Invalid=1496, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 13:04:49,898 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:49,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 86 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:04:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-02-15 13:04:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2023-02-15 13:04:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.107843137254902) internal successors, (226), 208 states have internal predecessors, (226), 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 13:04:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2023-02-15 13:04:49,902 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 103 [2023-02-15 13:04:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:49,902 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2023-02-15 13:04:49,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:04:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2023-02-15 13:04:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-15 13:04:49,903 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:49,903 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:49,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 13:04:50,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:50,115 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1018520203, now seen corresponding path program 3 times [2023-02-15 13:04:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:50,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828024909] [2023-02-15 13:04:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:50,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 293 proven. 142 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-15 13:04:50,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:50,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828024909] [2023-02-15 13:04:50,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828024909] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:50,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732984696] [2023-02-15 13:04:50,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 13:04:50,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:50,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:50,464 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:04:50,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 13:04:50,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 13:04:50,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:04:50,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 13:04:50,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:50,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:04:50,553 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 9 treesize of output 11 [2023-02-15 13:04:50,557 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 10 treesize of output 8 [2023-02-15 13:04:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2023-02-15 13:04:50,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2023-02-15 13:04:51,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732984696] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:51,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:51,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 18 [2023-02-15 13:04:51,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727162566] [2023-02-15 13:04:51,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:51,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 13:04:51,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:51,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 13:04:51,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-02-15 13:04:51,210 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 states have internal predecessors, (103), 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 13:04:52,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:52,018 INFO L93 Difference]: Finished difference Result 279 states and 300 transitions. [2023-02-15 13:04:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 13:04:52,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 states have internal predecessors, (103), 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 108 [2023-02-15 13:04:52,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:52,019 INFO L225 Difference]: With dead ends: 279 [2023-02-15 13:04:52,019 INFO L226 Difference]: Without dead ends: 279 [2023-02-15 13:04:52,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=454, Invalid=1616, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 13:04:52,021 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 358 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:52,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 65 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:04:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-02-15 13:04:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 273. [2023-02-15 13:04:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.1119402985074627) internal successors, (298), 272 states have internal predecessors, (298), 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 13:04:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 298 transitions. [2023-02-15 13:04:52,025 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 298 transitions. Word has length 108 [2023-02-15 13:04:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:52,026 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 298 transitions. [2023-02-15 13:04:52,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 states have internal predecessors, (103), 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 13:04:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 298 transitions. [2023-02-15 13:04:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-15 13:04:52,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:52,027 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:04:52,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 13:04:52,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-15 13:04:52,233 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:52,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:52,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1286679423, now seen corresponding path program 1 times [2023-02-15 13:04:52,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:52,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117770776] [2023-02-15 13:04:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:52,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2023-02-15 13:04:52,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:52,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117770776] [2023-02-15 13:04:52,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117770776] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:52,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839449454] [2023-02-15 13:04:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:52,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:52,437 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:04:52,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 13:04:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 13:04:52,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 498 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-15 13:04:52,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 17 proven. 481 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-15 13:04:53,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839449454] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:53,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:53,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 23 [2023-02-15 13:04:53,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954084638] [2023-02-15 13:04:53,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:53,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 13:04:53,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:53,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 13:04:53,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2023-02-15 13:04:53,167 INFO L87 Difference]: Start difference. First operand 273 states and 298 transitions. Second operand has 23 states, 23 states have (on average 7.869565217391305) internal successors, (181), 23 states have internal predecessors, (181), 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 13:04:53,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:53,774 INFO L93 Difference]: Finished difference Result 551 states and 594 transitions. [2023-02-15 13:04:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 13:04:53,774 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.869565217391305) internal successors, (181), 23 states have internal predecessors, (181), 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 121 [2023-02-15 13:04:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:53,779 INFO L225 Difference]: With dead ends: 551 [2023-02-15 13:04:53,780 INFO L226 Difference]: Without dead ends: 551 [2023-02-15 13:04:53,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2023-02-15 13:04:53,780 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 342 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:53,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 342 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:04:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-02-15 13:04:53,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 531. [2023-02-15 13:04:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 526 states have (on average 1.129277566539924) internal successors, (594), 530 states have internal predecessors, (594), 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 13:04:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 594 transitions. [2023-02-15 13:04:53,789 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 594 transitions. Word has length 121 [2023-02-15 13:04:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:53,790 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 594 transitions. [2023-02-15 13:04:53,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.869565217391305) internal successors, (181), 23 states have internal predecessors, (181), 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 13:04:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 594 transitions. [2023-02-15 13:04:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-15 13:04:53,791 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:53,791 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-15 13:04:53,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 13:04:53,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:53,997 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:53,998 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2023-02-15 13:04:53,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:53,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670392005] [2023-02-15 13:04:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:53,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 613 proven. 295 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-15 13:04:54,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:54,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670392005] [2023-02-15 13:04:54,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670392005] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:54,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277603109] [2023-02-15 13:04:54,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 13:04:54,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:54,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:54,440 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:04:54,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 13:04:54,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 13:04:54,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:04:54,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 13:04:54,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-15 13:04:54,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-15 13:04:55,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277603109] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:55,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:55,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 43 [2023-02-15 13:04:55,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116698135] [2023-02-15 13:04:55,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:55,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 13:04:55,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:55,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 13:04:55,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1382, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 13:04:55,292 INFO L87 Difference]: Start difference. First operand 531 states and 594 transitions. Second operand has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 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 13:04:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:04:56,738 INFO L93 Difference]: Finished difference Result 472 states and 503 transitions. [2023-02-15 13:04:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-15 13:04:56,738 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 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 121 [2023-02-15 13:04:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:04:56,740 INFO L225 Difference]: With dead ends: 472 [2023-02-15 13:04:56,740 INFO L226 Difference]: Without dead ends: 472 [2023-02-15 13:04:56,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 218 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2307, Invalid=9035, Unknown=0, NotChecked=0, Total=11342 [2023-02-15 13:04:56,742 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 587 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:04:56,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 131 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:04:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-02-15 13:04:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 466. [2023-02-15 13:04:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 461 states have (on average 1.0911062906724511) internal successors, (503), 465 states have internal predecessors, (503), 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 13:04:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 503 transitions. [2023-02-15 13:04:56,751 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 503 transitions. Word has length 121 [2023-02-15 13:04:56,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:04:56,751 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 503 transitions. [2023-02-15 13:04:56,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 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 13:04:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 503 transitions. [2023-02-15 13:04:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-02-15 13:04:56,752 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:04:56,753 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1] [2023-02-15 13:04:56,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-15 13:04:56,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:56,959 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:04:56,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:04:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1239811749, now seen corresponding path program 3 times [2023-02-15 13:04:56,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:04:56,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73541244] [2023-02-15 13:04:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:04:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:04:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:04:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1112 proven. 218 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-02-15 13:04:57,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:04:57,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73541244] [2023-02-15 13:04:57,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73541244] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:04:57,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915548307] [2023-02-15 13:04:57,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 13:04:57,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:04:57,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:04:57,437 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:04:57,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 13:04:57,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 13:04:57,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:04:57,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 13:04:57,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:04:57,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:04:57,555 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:04:57,555 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 13:04:57,562 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 10 treesize of output 8 [2023-02-15 13:04:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 13 proven. 552 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2023-02-15 13:04:58,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:04:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 565 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2023-02-15 13:04:59,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915548307] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:04:59,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:04:59,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 30 [2023-02-15 13:04:59,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124200531] [2023-02-15 13:04:59,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:04:59,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 13:04:59,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:04:59,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 13:04:59,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-02-15 13:04:59,463 INFO L87 Difference]: Start difference. First operand 466 states and 503 transitions. Second operand has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 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 13:05:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:05:02,212 INFO L93 Difference]: Finished difference Result 465 states and 492 transitions. [2023-02-15 13:05:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-15 13:05:02,213 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 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 162 [2023-02-15 13:05:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:05:02,214 INFO L225 Difference]: With dead ends: 465 [2023-02-15 13:05:02,214 INFO L226 Difference]: Without dead ends: 465 [2023-02-15 13:05:02,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1262, Invalid=4140, Unknown=0, NotChecked=0, Total=5402 [2023-02-15 13:05:02,216 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 222 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 13:05:02,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 121 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 13:05:02,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-02-15 13:05:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2023-02-15 13:05:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.0672451193058567) internal successors, (492), 464 states have internal predecessors, (492), 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 13:05:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 492 transitions. [2023-02-15 13:05:02,224 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 492 transitions. Word has length 162 [2023-02-15 13:05:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:05:02,224 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 492 transitions. [2023-02-15 13:05:02,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 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 13:05:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 492 transitions. [2023-02-15 13:05:02,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-02-15 13:05:02,227 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:05:02,228 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-15 13:05:02,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 13:05:02,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:02,434 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:05:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:05:02,434 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 5 times [2023-02-15 13:05:02,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:05:02,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60001098] [2023-02-15 13:05:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:05:02,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:05:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:05:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4200 proven. 311 refuted. 0 times theorem prover too weak. 1821 trivial. 0 not checked. [2023-02-15 13:05:03,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:05:03,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60001098] [2023-02-15 13:05:03,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60001098] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:05:03,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685821596] [2023-02-15 13:05:03,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 13:05:03,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:03,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:05:03,205 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:05:03,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 13:05:03,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-15 13:05:03,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:05:03,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 13:05:03,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:05:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4038 proven. 852 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2023-02-15 13:05:04,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:05:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4223 proven. 667 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2023-02-15 13:05:04,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685821596] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:05:04,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:05:04,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 41 [2023-02-15 13:05:04,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262815159] [2023-02-15 13:05:04,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:05:04,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 13:05:04,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:05:04,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 13:05:04,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 13:05:04,383 INFO L87 Difference]: Start difference. First operand 465 states and 492 transitions. Second operand has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 states have internal predecessors, (225), 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 13:05:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:05:05,597 INFO L93 Difference]: Finished difference Result 465 states and 487 transitions. [2023-02-15 13:05:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 13:05:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 states have internal predecessors, (225), 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 301 [2023-02-15 13:05:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:05:05,599 INFO L225 Difference]: With dead ends: 465 [2023-02-15 13:05:05,599 INFO L226 Difference]: Without dead ends: 465 [2023-02-15 13:05:05,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 576 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1138, Invalid=4412, Unknown=0, NotChecked=0, Total=5550 [2023-02-15 13:05:05,601 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 119 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 13:05:05,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 254 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 13:05:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-02-15 13:05:05,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2023-02-15 13:05:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.0563991323210413) internal successors, (487), 464 states have internal predecessors, (487), 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 13:05:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 487 transitions. [2023-02-15 13:05:05,608 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 487 transitions. Word has length 301 [2023-02-15 13:05:05,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:05:05,608 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 487 transitions. [2023-02-15 13:05:05,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 states have internal predecessors, (225), 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 13:05:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 487 transitions. [2023-02-15 13:05:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-02-15 13:05:05,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:05:05,610 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-15 13:05:05,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 13:05:05,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 13:05:05,813 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:05:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:05:05,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 6 times [2023-02-15 13:05:05,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:05:05,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081679691] [2023-02-15 13:05:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:05:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:05:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:05:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4815 proven. 419 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2023-02-15 13:05:06,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:05:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081679691] [2023-02-15 13:05:06,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081679691] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:05:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816270749] [2023-02-15 13:05:06,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 13:05:06,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:06,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:05:06,633 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:05:06,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 13:05:08,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-02-15 13:05:08,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:05:08,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 13:05:08,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:05:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 5041 proven. 1392 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2023-02-15 13:05:08,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:05:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 5041 proven. 1392 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2023-02-15 13:05:09,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816270749] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:05:09,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:05:09,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 43 [2023-02-15 13:05:09,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365800002] [2023-02-15 13:05:09,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:05:09,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 13:05:09,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:05:09,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 13:05:09,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1492, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 13:05:09,314 INFO L87 Difference]: Start difference. First operand 465 states and 487 transitions. Second operand has 43 states, 43 states have (on average 6.348837209302325) internal successors, (273), 43 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:05:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:05:11,546 INFO L93 Difference]: Finished difference Result 571 states and 584 transitions. [2023-02-15 13:05:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-15 13:05:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.348837209302325) internal successors, (273), 43 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 316 [2023-02-15 13:05:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:05:11,548 INFO L225 Difference]: With dead ends: 571 [2023-02-15 13:05:11,548 INFO L226 Difference]: Without dead ends: 571 [2023-02-15 13:05:11,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 603 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1716, Invalid=7026, Unknown=0, NotChecked=0, Total=8742 [2023-02-15 13:05:11,551 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 146 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 3551 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:05:11,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 212 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3551 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 13:05:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-02-15 13:05:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 559. [2023-02-15 13:05:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 555 states have (on average 1.0342342342342343) internal successors, (574), 558 states have internal predecessors, (574), 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 13:05:11,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 574 transitions. [2023-02-15 13:05:11,558 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 574 transitions. Word has length 316 [2023-02-15 13:05:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:05:11,559 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 574 transitions. [2023-02-15 13:05:11,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.348837209302325) internal successors, (273), 43 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 13:05:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 574 transitions. [2023-02-15 13:05:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-02-15 13:05:11,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:05:11,561 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 54, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-15 13:05:11,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 13:05:11,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-15 13:05:11,769 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:05:11,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:05:11,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1065134024, now seen corresponding path program 7 times [2023-02-15 13:05:11,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:05:11,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446601926] [2023-02-15 13:05:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:05:11,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:05:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:05:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 3828 proven. 705 refuted. 0 times theorem prover too weak. 3374 trivial. 0 not checked. [2023-02-15 13:05:12,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:05:12,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446601926] [2023-02-15 13:05:12,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446601926] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:05:12,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061769268] [2023-02-15 13:05:12,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 13:05:12,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:12,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:05:12,786 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:05:12,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 13:05:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:05:12,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 13:05:12,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:05:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-15 13:05:13,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:05:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-15 13:05:14,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061769268] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:05:14,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:05:14,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 44 [2023-02-15 13:05:14,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315576266] [2023-02-15 13:05:14,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:05:14,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 13:05:14,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:05:14,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 13:05:14,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 13:05:14,128 INFO L87 Difference]: Start difference. First operand 559 states and 574 transitions. Second operand has 44 states, 44 states have (on average 6.113636363636363) internal successors, (269), 44 states have internal predecessors, (269), 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 13:05:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:05:16,310 INFO L93 Difference]: Finished difference Result 625 states and 633 transitions. [2023-02-15 13:05:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-02-15 13:05:16,311 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.113636363636363) internal successors, (269), 44 states have internal predecessors, (269), 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 331 [2023-02-15 13:05:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:05:16,313 INFO L225 Difference]: With dead ends: 625 [2023-02-15 13:05:16,313 INFO L226 Difference]: Without dead ends: 625 [2023-02-15 13:05:16,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 627 SyntacticMatches, 19 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6732 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3388, Invalid=16634, Unknown=0, NotChecked=0, Total=20022 [2023-02-15 13:05:16,317 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1028 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 13:05:16,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 221 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 13:05:16,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-02-15 13:05:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 506. [2023-02-15 13:05:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 502 states have (on average 1.0278884462151394) internal successors, (516), 505 states have internal predecessors, (516), 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 13:05:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 516 transitions. [2023-02-15 13:05:16,325 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 516 transitions. Word has length 331 [2023-02-15 13:05:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:05:16,326 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 516 transitions. [2023-02-15 13:05:16,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.113636363636363) internal successors, (269), 44 states have internal predecessors, (269), 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 13:05:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 516 transitions. [2023-02-15 13:05:16,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-02-15 13:05:16,328 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:05:16,328 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-15 13:05:16,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 13:05:16,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-15 13:05:16,537 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:05:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:05:16,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1903304557, now seen corresponding path program 8 times [2023-02-15 13:05:16,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:05:16,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484371329] [2023-02-15 13:05:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:05:16,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:05:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:05:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 13:05:17,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:05:17,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484371329] [2023-02-15 13:05:17,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484371329] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:05:17,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664301905] [2023-02-15 13:05:17,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 13:05:17,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:17,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:05:17,165 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:05:17,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 13:05:17,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 13:05:17,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:05:17,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 13:05:17,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:05:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 13:05:17,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:05:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 13:05:17,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664301905] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:05:17,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:05:17,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-02-15 13:05:17,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055527121] [2023-02-15 13:05:17,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:05:17,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 13:05:17,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:05:17,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 13:05:17,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2023-02-15 13:05:17,925 INFO L87 Difference]: Start difference. First operand 506 states and 516 transitions. Second operand has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 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 13:05:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:05:20,768 INFO L93 Difference]: Finished difference Result 1246 states and 1332 transitions. [2023-02-15 13:05:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 13:05:20,768 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 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 388 [2023-02-15 13:05:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:05:20,772 INFO L225 Difference]: With dead ends: 1246 [2023-02-15 13:05:20,772 INFO L226 Difference]: Without dead ends: 1246 [2023-02-15 13:05:20,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 772 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 13:05:20,773 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1707 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:05:20,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1707 Valid, 819 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:05:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2023-02-15 13:05:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 565. [2023-02-15 13:05:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 561 states have (on average 1.0659536541889483) internal successors, (598), 564 states have internal predecessors, (598), 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 13:05:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 598 transitions. [2023-02-15 13:05:20,785 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 598 transitions. Word has length 388 [2023-02-15 13:05:20,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:05:20,785 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 598 transitions. [2023-02-15 13:05:20,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 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 13:05:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 598 transitions. [2023-02-15 13:05:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-02-15 13:05:20,788 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:05:20,789 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-15 13:05:20,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 13:05:20,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:20,997 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:05:20,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:05:20,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1127100931, now seen corresponding path program 2 times [2023-02-15 13:05:20,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:05:20,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981726553] [2023-02-15 13:05:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:05:20,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:05:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:05:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 13:05:22,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:05:22,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981726553] [2023-02-15 13:05:22,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981726553] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:05:22,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005325163] [2023-02-15 13:05:22,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 13:05:22,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:22,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:05:22,129 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:05:22,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 13:05:22,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 13:05:22,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:05:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-15 13:05:22,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:05:22,424 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:05:22,425 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 13:05:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 13:05:23,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:05:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 13:05:24,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005325163] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:05:24,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:05:24,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2023-02-15 13:05:24,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342773145] [2023-02-15 13:05:24,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:05:24,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 13:05:24,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:05:24,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 13:05:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 13:05:24,719 INFO L87 Difference]: Start difference. First operand 565 states and 598 transitions. Second operand has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 states have internal predecessors, (184), 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 13:05:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:05:26,327 INFO L93 Difference]: Finished difference Result 1236 states and 1322 transitions. [2023-02-15 13:05:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 13:05:26,328 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 states have internal predecessors, (184), 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 389 [2023-02-15 13:05:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:05:26,332 INFO L225 Difference]: With dead ends: 1236 [2023-02-15 13:05:26,332 INFO L226 Difference]: Without dead ends: 1236 [2023-02-15 13:05:26,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 755 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1288, Invalid=3268, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 13:05:26,333 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1598 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 13:05:26,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1598 Valid, 767 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 13:05:26,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2023-02-15 13:05:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 566. [2023-02-15 13:05:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 562 states have (on average 1.0462633451957295) internal successors, (588), 565 states have internal predecessors, (588), 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 13:05:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 588 transitions. [2023-02-15 13:05:26,342 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 588 transitions. Word has length 389 [2023-02-15 13:05:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:05:26,343 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 588 transitions. [2023-02-15 13:05:26,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 states have internal predecessors, (184), 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 13:05:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 588 transitions. [2023-02-15 13:05:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2023-02-15 13:05:26,345 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:05:26,346 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 62, 10, 10, 10, 10, 10, 10, 10, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2023-02-15 13:05:26,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-15 13:05:26,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:26,553 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:05:26,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:05:26,554 INFO L85 PathProgramCache]: Analyzing trace with hash -788499985, now seen corresponding path program 4 times [2023-02-15 13:05:26,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:05:26,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098403772] [2023-02-15 13:05:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:05:26,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:05:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:05:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 6654 proven. 1334 refuted. 0 times theorem prover too weak. 2462 trivial. 0 not checked. [2023-02-15 13:05:27,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:05:27,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098403772] [2023-02-15 13:05:27,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098403772] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:05:27,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644504859] [2023-02-15 13:05:27,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 13:05:27,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:27,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:05:27,826 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:05:27,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 13:05:28,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 13:05:28,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:05:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 13:05:28,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:05:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 9350 proven. 78 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2023-02-15 13:05:29,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:05:29,331 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 13:05:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 9350 proven. 78 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2023-02-15 13:05:29,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644504859] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:05:29,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:05:29,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 19] total 52 [2023-02-15 13:05:29,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726688625] [2023-02-15 13:05:29,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:05:29,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 13:05:29,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:05:29,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 13:05:29,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2296, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 13:05:29,824 INFO L87 Difference]: Start difference. First operand 566 states and 588 transitions. Second operand has 52 states, 52 states have (on average 6.730769230769231) internal successors, (350), 52 states have internal predecessors, (350), 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 13:05:34,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:05:34,067 INFO L93 Difference]: Finished difference Result 622 states and 649 transitions. [2023-02-15 13:05:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-15 13:05:34,068 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.730769230769231) internal successors, (350), 52 states have internal predecessors, (350), 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 406 [2023-02-15 13:05:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:05:34,070 INFO L225 Difference]: With dead ends: 622 [2023-02-15 13:05:34,070 INFO L226 Difference]: Without dead ends: 622 [2023-02-15 13:05:34,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 792 SyntacticMatches, 6 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6574 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3084, Invalid=18968, Unknown=0, NotChecked=0, Total=22052 [2023-02-15 13:05:34,073 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2459 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 5048 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2459 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 5143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 5048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-15 13:05:34,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2459 Valid, 307 Invalid, 5143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 5048 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-15 13:05:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2023-02-15 13:05:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 504. [2023-02-15 13:05:34,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.036) internal successors, (518), 503 states have internal predecessors, (518), 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 13:05:34,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 518 transitions. [2023-02-15 13:05:34,082 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 518 transitions. Word has length 406 [2023-02-15 13:05:34,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:05:34,082 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 518 transitions. [2023-02-15 13:05:34,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.730769230769231) internal successors, (350), 52 states have internal predecessors, (350), 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 13:05:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 518 transitions. [2023-02-15 13:05:34,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-02-15 13:05:34,085 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:05:34,085 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 64, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-02-15 13:05:34,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-15 13:05:34,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-15 13:05:34,293 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:05:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:05:34,294 INFO L85 PathProgramCache]: Analyzing trace with hash -120695514, now seen corresponding path program 5 times [2023-02-15 13:05:34,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:05:34,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58329455] [2023-02-15 13:05:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:05:34,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:05:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:05:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11245 backedges. 4926 proven. 833 refuted. 0 times theorem prover too weak. 5486 trivial. 0 not checked. [2023-02-15 13:05:35,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:05:35,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58329455] [2023-02-15 13:05:35,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58329455] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:05:35,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389776886] [2023-02-15 13:05:35,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 13:05:35,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:35,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:05:35,445 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:05:35,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 13:05:39,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-02-15 13:05:39,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:05:39,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 13:05:39,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:05:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11245 backedges. 6585 proven. 3571 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2023-02-15 13:05:40,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:05:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11245 backedges. 7345 proven. 2811 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2023-02-15 13:05:41,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389776886] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:05:41,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:05:41,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 62 [2023-02-15 13:05:41,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148086578] [2023-02-15 13:05:41,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:05:41,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-15 13:05:41,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:05:41,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-15 13:05:41,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=3141, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 13:05:41,147 INFO L87 Difference]: Start difference. First operand 504 states and 518 transitions. Second operand has 62 states, 62 states have (on average 5.645161290322581) internal successors, (350), 62 states have internal predecessors, (350), 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 13:05:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:05:44,201 INFO L93 Difference]: Finished difference Result 504 states and 517 transitions. [2023-02-15 13:05:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-02-15 13:05:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 5.645161290322581) internal successors, (350), 62 states have internal predecessors, (350), 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 436 [2023-02-15 13:05:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:05:44,202 INFO L225 Difference]: With dead ends: 504 [2023-02-15 13:05:44,203 INFO L226 Difference]: Without dead ends: 504 [2023-02-15 13:05:44,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 975 GetRequests, 830 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4906 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3683, Invalid=15499, Unknown=0, NotChecked=0, Total=19182 [2023-02-15 13:05:44,204 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 162 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 4077 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 4098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 4077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:05:44,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 313 Invalid, 4098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 4077 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-15 13:05:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-15 13:05:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2023-02-15 13:05:44,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.034) internal successors, (517), 503 states have internal predecessors, (517), 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 13:05:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 517 transitions. [2023-02-15 13:05:44,210 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 517 transitions. Word has length 436 [2023-02-15 13:05:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:05:44,211 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 517 transitions. [2023-02-15 13:05:44,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 5.645161290322581) internal successors, (350), 62 states have internal predecessors, (350), 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 13:05:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 517 transitions. [2023-02-15 13:05:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-02-15 13:05:44,213 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:05:44,213 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 65, 65, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-02-15 13:05:44,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-15 13:05:44,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-15 13:05:44,424 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:05:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:05:44,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1059357911, now seen corresponding path program 6 times [2023-02-15 13:05:44,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:05:44,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215844292] [2023-02-15 13:05:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:05:44,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:05:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:05:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11575 backedges. 2529 proven. 3474 refuted. 0 times theorem prover too weak. 5572 trivial. 0 not checked. [2023-02-15 13:05:46,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:05:46,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215844292] [2023-02-15 13:05:46,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215844292] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:05:46,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649026964] [2023-02-15 13:05:46,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 13:05:46,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:46,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:05:46,607 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:05:46,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-15 13:05:46,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-15 13:05:46,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:05:46,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 13:05:46,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:05:46,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:05:46,789 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 9 treesize of output 11 [2023-02-15 13:05:46,792 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 10 treesize of output 8 [2023-02-15 13:05:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11575 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 11537 trivial. 0 not checked. [2023-02-15 13:05:47,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:05:47,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649026964] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:05:47,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:05:47,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [28] total 31 [2023-02-15 13:05:47,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643386733] [2023-02-15 13:05:47,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:05:47,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:05:47,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:05:47,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:05:47,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-02-15 13:05:47,795 INFO L87 Difference]: Start difference. First operand 504 states and 517 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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 13:05:47,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:05:47,823 INFO L93 Difference]: Finished difference Result 503 states and 516 transitions. [2023-02-15 13:05:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:05:47,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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 441 [2023-02-15 13:05:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:05:47,829 INFO L225 Difference]: With dead ends: 503 [2023-02-15 13:05:47,829 INFO L226 Difference]: Without dead ends: 503 [2023-02-15 13:05:47,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-02-15 13:05:47,830 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:05:47,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 39 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:05:47,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-02-15 13:05:47,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 502. [2023-02-15 13:05:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 499 states have (on average 1.032064128256513) internal successors, (515), 501 states have internal predecessors, (515), 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 13:05:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 515 transitions. [2023-02-15 13:05:47,836 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 515 transitions. Word has length 441 [2023-02-15 13:05:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:05:47,836 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 515 transitions. [2023-02-15 13:05:47,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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 13:05:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 515 transitions. [2023-02-15 13:05:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-02-15 13:05:47,839 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:05:47,839 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 65, 65, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:05:47,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-15 13:05:48,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:48,045 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:05:48,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:05:48,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1519644578, now seen corresponding path program 2 times [2023-02-15 13:05:48,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:05:48,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340861782] [2023-02-15 13:05:48,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:05:48,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:05:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:05:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11565 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11375 trivial. 0 not checked. [2023-02-15 13:05:48,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:05:48,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340861782] [2023-02-15 13:05:48,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340861782] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:05:48,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459896438] [2023-02-15 13:05:48,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 13:05:48,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:48,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:05:48,860 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:05:48,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-15 13:05:49,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 13:05:49,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:05:49,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 13:05:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:05:51,064 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_33| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_28| Int) (v_ArrVal_2261 Int) (v_ArrVal_2263 Int) (v_ArrVal_2262 Int)) (and (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| v_ArrVal_2262) |v_ULTIMATE.start_main_~#mask~0#1.base_28| v_ArrVal_2261) |v_ULTIMATE.start_main_~#b~0#1.base_33| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_28| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| v_ArrVal_2263) |v_ULTIMATE.start_main_~#mask~0#1.base_28|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33|) 0))) is different from true [2023-02-15 13:05:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11565 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11565 trivial. 0 not checked. [2023-02-15 13:05:51,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:05:51,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459896438] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:05:51,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:05:51,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2023-02-15 13:05:51,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882149486] [2023-02-15 13:05:51,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:05:51,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:05:51,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:05:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:05:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-02-15 13:05:51,072 INFO L87 Difference]: Start difference. First operand 502 states and 515 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 13:05:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:05:51,080 INFO L93 Difference]: Finished difference Result 501 states and 514 transitions. [2023-02-15 13:05:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:05:51,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 442 [2023-02-15 13:05:51,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:05:51,083 INFO L225 Difference]: With dead ends: 501 [2023-02-15 13:05:51,083 INFO L226 Difference]: Without dead ends: 457 [2023-02-15 13:05:51,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-02-15 13:05:51,084 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:05:51,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2023-02-15 13:05:51,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-02-15 13:05:51,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2023-02-15 13:05:51,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 449 states have (on average 1.0311804008908685) internal successors, (463), 450 states have internal predecessors, (463), 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 13:05:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 463 transitions. [2023-02-15 13:05:51,091 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 463 transitions. Word has length 442 [2023-02-15 13:05:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:05:51,091 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 463 transitions. [2023-02-15 13:05:51,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 13:05:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 463 transitions. [2023-02-15 13:05:51,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-02-15 13:05:51,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:05:51,094 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-15 13:05:51,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-15 13:05:51,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:51,301 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:05:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:05:51,301 INFO L85 PathProgramCache]: Analyzing trace with hash -205352877, now seen corresponding path program 9 times [2023-02-15 13:05:51,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:05:51,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376419231] [2023-02-15 13:05:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:05:51,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:05:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:05:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 8596 proven. 1474 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2023-02-15 13:05:53,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:05:53,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376419231] [2023-02-15 13:05:53,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376419231] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:05:53,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483329160] [2023-02-15 13:05:53,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 13:05:53,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:05:53,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:05:53,031 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:05:53,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-15 13:05:53,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-02-15 13:05:53,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:05:53,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 13:05:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:05:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 2384 proven. 6676 refuted. 0 times theorem prover too weak. 6296 trivial. 0 not checked. [2023-02-15 13:05:54,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:05:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 0 proven. 9060 refuted. 0 times theorem prover too weak. 6296 trivial. 0 not checked. [2023-02-15 13:05:56,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483329160] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:05:56,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:05:56,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20, 20] total 76 [2023-02-15 13:05:56,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380311785] [2023-02-15 13:05:56,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:05:56,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-15 13:05:56,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:05:56,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-15 13:05:56,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=4895, Unknown=0, NotChecked=0, Total=5700 [2023-02-15 13:05:56,281 INFO L87 Difference]: Start difference. First operand 451 states and 463 transitions. Second operand has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 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 13:06:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:06:10,586 INFO L93 Difference]: Finished difference Result 765 states and 801 transitions. [2023-02-15 13:06:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2023-02-15 13:06:10,586 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 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 448 [2023-02-15 13:06:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:06:10,589 INFO L225 Difference]: With dead ends: 765 [2023-02-15 13:06:10,589 INFO L226 Difference]: Without dead ends: 765 [2023-02-15 13:06:10,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 862 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26070 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=15061, Invalid=48695, Unknown=0, NotChecked=0, Total=63756 [2023-02-15 13:06:10,593 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2021 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2021 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 13:06:10,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2021 Valid, 112 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 13:06:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-02-15 13:06:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 751. [2023-02-15 13:06:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 749 states have (on average 1.0534045393858478) internal successors, (789), 750 states have internal predecessors, (789), 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 13:06:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 789 transitions. [2023-02-15 13:06:10,602 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 789 transitions. Word has length 448 [2023-02-15 13:06:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:06:10,603 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 789 transitions. [2023-02-15 13:06:10,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 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 13:06:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 789 transitions. [2023-02-15 13:06:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2023-02-15 13:06:10,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:06:10,606 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 87, 87, 87, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1] [2023-02-15 13:06:10,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-15 13:06:10,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:06:10,813 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:06:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:06:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash 566383551, now seen corresponding path program 3 times [2023-02-15 13:06:10,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:06:10,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804477039] [2023-02-15 13:06:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:06:10,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:06:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:06:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 10633 proven. 1636 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 13:06:12,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:06:12,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804477039] [2023-02-15 13:06:12,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804477039] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:06:12,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762365367] [2023-02-15 13:06:12,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 13:06:12,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:06:12,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:06:12,550 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:06:12,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 13:06:12,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 13:06:12,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:06:12,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 13:06:12,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:06:12,768 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 13:06:12,768 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 13:06:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 108 proven. 7575 refuted. 0 times theorem prover too weak. 12488 trivial. 0 not checked. [2023-02-15 13:06:14,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:06:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 0 proven. 7683 refuted. 0 times theorem prover too weak. 12488 trivial. 0 not checked. [2023-02-15 13:06:15,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762365367] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:06:15,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:06:15,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 6, 6] total 49 [2023-02-15 13:06:15,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230255593] [2023-02-15 13:06:15,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:06:15,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 13:06:15,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:06:15,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 13:06:15,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1940, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 13:06:15,859 INFO L87 Difference]: Start difference. First operand 751 states and 789 transitions. Second operand has 49 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 49 states have internal predecessors, (240), 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 13:06:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:06:17,844 INFO L93 Difference]: Finished difference Result 776 states and 802 transitions. [2023-02-15 13:06:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-15 13:06:17,845 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 49 states have internal predecessors, (240), 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 511 [2023-02-15 13:06:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:06:17,846 INFO L225 Difference]: With dead ends: 776 [2023-02-15 13:06:17,847 INFO L226 Difference]: Without dead ends: 776 [2023-02-15 13:06:17,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1013 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2859 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2234, Invalid=7866, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 13:06:17,848 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 767 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:06:17,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 66 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:06:17,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2023-02-15 13:06:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 695. [2023-02-15 13:06:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.037463976945245) internal successors, (720), 694 states have internal predecessors, (720), 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 13:06:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 720 transitions. [2023-02-15 13:06:17,857 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 720 transitions. Word has length 511 [2023-02-15 13:06:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:06:17,858 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 720 transitions. [2023-02-15 13:06:17,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 49 states have internal predecessors, (240), 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 13:06:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 720 transitions. [2023-02-15 13:06:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2023-02-15 13:06:17,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:06:17,862 INFO L195 NwaCegarLoop]: trace histogram [122, 121, 121, 121, 121, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1] [2023-02-15 13:06:17,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-15 13:06:18,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-15 13:06:18,069 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:06:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:06:18,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1780829527, now seen corresponding path program 10 times [2023-02-15 13:06:18,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:06:18,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207692139] [2023-02-15 13:06:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:06:18,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:06:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:06:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 38480 backedges. 21336 proven. 5769 refuted. 0 times theorem prover too weak. 11375 trivial. 0 not checked. [2023-02-15 13:06:22,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:06:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207692139] [2023-02-15 13:06:22,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207692139] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:06:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281990725] [2023-02-15 13:06:22,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 13:06:22,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:06:22,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:06:22,135 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:06:22,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-15 13:06:23,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 13:06:23,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:06:23,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 2022 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-15 13:06:23,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:06:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 38480 backedges. 1298 proven. 34498 refuted. 0 times theorem prover too weak. 2684 trivial. 0 not checked. [2023-02-15 13:06:25,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:06:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 38480 backedges. 1298 proven. 34498 refuted. 0 times theorem prover too weak. 2684 trivial. 0 not checked. [2023-02-15 13:06:27,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281990725] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:06:27,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:06:27,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 38, 38] total 123 [2023-02-15 13:06:27,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085302208] [2023-02-15 13:06:27,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:06:27,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-02-15 13:06:27,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:06:27,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-02-15 13:06:27,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2306, Invalid=12700, Unknown=0, NotChecked=0, Total=15006 [2023-02-15 13:06:27,213 INFO L87 Difference]: Start difference. First operand 695 states and 720 transitions. Second operand has 123 states, 123 states have (on average 6.073170731707317) internal successors, (747), 123 states have internal predecessors, (747), 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 13:06:40,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:06:40,059 INFO L93 Difference]: Finished difference Result 1668 states and 1758 transitions. [2023-02-15 13:06:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 313 states. [2023-02-15 13:06:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 6.073170731707317) internal successors, (747), 123 states have internal predecessors, (747), 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 694 [2023-02-15 13:06:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:06:40,063 INFO L225 Difference]: With dead ends: 1668 [2023-02-15 13:06:40,063 INFO L226 Difference]: Without dead ends: 1668 [2023-02-15 13:06:40,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1746 GetRequests, 1320 SyntacticMatches, 10 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71608 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=27575, Invalid=146731, Unknown=0, NotChecked=0, Total=174306 [2023-02-15 13:06:40,071 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1264 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 5036 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 5287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 5036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:06:40,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1264 Valid, 457 Invalid, 5287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 5036 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-02-15 13:06:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2023-02-15 13:06:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1640. [2023-02-15 13:06:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.055521659548505) internal successors, (1730), 1639 states have internal predecessors, (1730), 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 13:06:40,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1730 transitions. [2023-02-15 13:06:40,089 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1730 transitions. Word has length 694 [2023-02-15 13:06:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:06:40,089 INFO L495 AbstractCegarLoop]: Abstraction has 1640 states and 1730 transitions. [2023-02-15 13:06:40,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 6.073170731707317) internal successors, (747), 123 states have internal predecessors, (747), 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 13:06:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1730 transitions. [2023-02-15 13:06:40,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1343 [2023-02-15 13:06:40,103 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:06:40,103 INFO L195 NwaCegarLoop]: trace histogram [239, 238, 238, 238, 238, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-15 13:06:40,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-15 13:06:40,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-15 13:06:40,315 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:06:40,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:06:40,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1519464941, now seen corresponding path program 11 times [2023-02-15 13:06:40,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:06:40,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000943785] [2023-02-15 13:06:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:06:40,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:06:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:06:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 148001 backedges. 86544 proven. 2852 refuted. 0 times theorem prover too weak. 58605 trivial. 0 not checked. [2023-02-15 13:06:44,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:06:44,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000943785] [2023-02-15 13:06:44,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000943785] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:06:44,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626490869] [2023-02-15 13:06:44,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 13:06:44,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:06:44,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:06:44,121 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:06:44,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-15 13:07:08,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2023-02-15 13:07:08,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:07:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1808 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 13:07:08,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:07:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 148001 backedges. 91615 proven. 7532 refuted. 0 times theorem prover too weak. 48854 trivial. 0 not checked. [2023-02-15 13:07:09,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:07:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 148001 backedges. 93272 proven. 5875 refuted. 0 times theorem prover too weak. 48854 trivial. 0 not checked. [2023-02-15 13:07:10,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626490869] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:07:10,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:07:10,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 78 [2023-02-15 13:07:10,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107466971] [2023-02-15 13:07:10,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:07:10,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-15 13:07:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:07:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-15 13:07:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=982, Invalid=5024, Unknown=0, NotChecked=0, Total=6006 [2023-02-15 13:07:10,551 INFO L87 Difference]: Start difference. First operand 1640 states and 1730 transitions. Second operand has 78 states, 78 states have (on average 5.730769230769231) internal successors, (447), 78 states have internal predecessors, (447), 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 13:07:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:07:16,602 INFO L93 Difference]: Finished difference Result 1640 states and 1694 transitions. [2023-02-15 13:07:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2023-02-15 13:07:16,603 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 5.730769230769231) internal successors, (447), 78 states have internal predecessors, (447), 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 1342 [2023-02-15 13:07:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:07:16,606 INFO L225 Difference]: With dead ends: 1640 [2023-02-15 13:07:16,606 INFO L226 Difference]: Without dead ends: 1640 [2023-02-15 13:07:16,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2834 GetRequests, 2630 SyntacticMatches, 10 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9980 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7187, Invalid=31033, Unknown=0, NotChecked=0, Total=38220 [2023-02-15 13:07:16,609 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 192 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 9068 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 9092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 9068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-02-15 13:07:16,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 493 Invalid, 9092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 9068 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-02-15 13:07:16,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2023-02-15 13:07:16,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1640. [2023-02-15 13:07:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.0335570469798658) internal successors, (1694), 1639 states have internal predecessors, (1694), 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 13:07:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1694 transitions. [2023-02-15 13:07:16,626 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1694 transitions. Word has length 1342 [2023-02-15 13:07:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:07:16,627 INFO L495 AbstractCegarLoop]: Abstraction has 1640 states and 1694 transitions. [2023-02-15 13:07:16,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 5.730769230769231) internal successors, (447), 78 states have internal predecessors, (447), 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 13:07:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1694 transitions. [2023-02-15 13:07:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1383 [2023-02-15 13:07:16,641 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:07:16,642 INFO L195 NwaCegarLoop]: trace histogram [247, 246, 246, 246, 246, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-15 13:07:16,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-15 13:07:16,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-15 13:07:16,857 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:07:16,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:07:16,858 INFO L85 PathProgramCache]: Analyzing trace with hash 884344755, now seen corresponding path program 12 times [2023-02-15 13:07:16,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:07:16,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790969216] [2023-02-15 13:07:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:07:16,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:07:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:07:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 157845 backedges. 92683 proven. 1595 refuted. 0 times theorem prover too weak. 63567 trivial. 0 not checked. [2023-02-15 13:07:20,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:07:20,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790969216] [2023-02-15 13:07:20,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790969216] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:07:20,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700992555] [2023-02-15 13:07:20,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 13:07:20,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:07:20,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:07:20,055 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:07:20,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-15 13:07:27,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2023-02-15 13:07:27,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:07:27,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 2231 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-15 13:07:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:07:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 157845 backedges. 0 proven. 26770 refuted. 0 times theorem prover too weak. 131075 trivial. 0 not checked. [2023-02-15 13:07:29,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:07:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 157845 backedges. 25571 proven. 1199 refuted. 0 times theorem prover too weak. 131075 trivial. 0 not checked. [2023-02-15 13:07:30,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700992555] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:07:30,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:07:30,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 25, 24] total 81 [2023-02-15 13:07:30,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739505213] [2023-02-15 13:07:30,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:07:30,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-15 13:07:30,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:07:30,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-15 13:07:30,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=5646, Unknown=0, NotChecked=0, Total=6480 [2023-02-15 13:07:30,664 INFO L87 Difference]: Start difference. First operand 1640 states and 1694 transitions. Second operand has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 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 13:07:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:07:43,832 INFO L93 Difference]: Finished difference Result 1963 states and 2027 transitions. [2023-02-15 13:07:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-02-15 13:07:43,832 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 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 1382 [2023-02-15 13:07:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:07:43,837 INFO L225 Difference]: With dead ends: 1963 [2023-02-15 13:07:43,838 INFO L226 Difference]: Without dead ends: 1963 [2023-02-15 13:07:43,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2908 GetRequests, 2718 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8922 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=5164, Invalid=31508, Unknown=0, NotChecked=0, Total=36672 [2023-02-15 13:07:43,841 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2458 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 7773 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2458 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 7806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 7773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:07:43,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2458 Valid, 1077 Invalid, 7806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 7773 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-15 13:07:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2023-02-15 13:07:43,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1690. [2023-02-15 13:07:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.0325636471284785) internal successors, (1744), 1689 states have internal predecessors, (1744), 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 13:07:43,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1744 transitions. [2023-02-15 13:07:43,858 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1744 transitions. Word has length 1382 [2023-02-15 13:07:43,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:07:43,858 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 1744 transitions. [2023-02-15 13:07:43,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 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 13:07:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1744 transitions. [2023-02-15 13:07:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1468 [2023-02-15 13:07:43,874 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:07:43,874 INFO L195 NwaCegarLoop]: trace histogram [264, 263, 263, 263, 263, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-15 13:07:43,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-15 13:07:44,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-15 13:07:44,090 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:07:44,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:07:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1199622708, now seen corresponding path program 13 times [2023-02-15 13:07:44,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:07:44,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975141493] [2023-02-15 13:07:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:07:44,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:07:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:07:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 179826 backedges. 106853 proven. 1823 refuted. 0 times theorem prover too weak. 71150 trivial. 0 not checked. [2023-02-15 13:07:47,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:07:47,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975141493] [2023-02-15 13:07:47,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975141493] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:07:47,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924763447] [2023-02-15 13:07:47,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 13:07:47,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:07:47,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:07:47,861 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:07:47,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-15 13:07:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:07:48,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 4165 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 13:07:48,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:07:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 179826 backedges. 124640 proven. 9808 refuted. 0 times theorem prover too weak. 45378 trivial. 0 not checked. [2023-02-15 13:07:49,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:07:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 179826 backedges. 124640 proven. 9808 refuted. 0 times theorem prover too weak. 45378 trivial. 0 not checked. [2023-02-15 13:07:51,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924763447] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:07:51,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:07:51,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 81 [2023-02-15 13:07:51,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614076045] [2023-02-15 13:07:51,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:07:51,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-15 13:07:51,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:07:51,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-15 13:07:51,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1034, Invalid=5446, Unknown=0, NotChecked=0, Total=6480 [2023-02-15 13:07:51,478 INFO L87 Difference]: Start difference. First operand 1690 states and 1744 transitions. Second operand has 81 states, 81 states have (on average 6.222222222222222) internal successors, (504), 81 states have internal predecessors, (504), 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 13:08:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:08:00,167 INFO L93 Difference]: Finished difference Result 1690 states and 1735 transitions. [2023-02-15 13:08:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2023-02-15 13:08:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 6.222222222222222) internal successors, (504), 81 states have internal predecessors, (504), 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 1467 [2023-02-15 13:08:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:08:00,171 INFO L225 Difference]: With dead ends: 1690 [2023-02-15 13:08:00,171 INFO L226 Difference]: Without dead ends: 1690 [2023-02-15 13:08:00,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3119 GetRequests, 2875 SyntacticMatches, 15 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14030 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9152, Invalid=43978, Unknown=0, NotChecked=0, Total=53130 [2023-02-15 13:08:00,175 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 11077 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 11100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-02-15 13:08:00,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 463 Invalid, 11100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11077 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-02-15 13:08:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2023-02-15 13:08:00,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1690. [2023-02-15 13:08:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.0272350503256364) internal successors, (1735), 1689 states have internal predecessors, (1735), 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 13:08:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1735 transitions. [2023-02-15 13:08:00,189 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1735 transitions. Word has length 1467 [2023-02-15 13:08:00,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:08:00,190 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 1735 transitions. [2023-02-15 13:08:00,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 6.222222222222222) internal successors, (504), 81 states have internal predecessors, (504), 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 13:08:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1735 transitions. [2023-02-15 13:08:00,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1498 [2023-02-15 13:08:00,206 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:08:00,206 INFO L195 NwaCegarLoop]: trace histogram [270, 269, 269, 269, 269, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-15 13:08:00,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-15 13:08:00,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:08:00,416 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 13:08:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:08:00,416 INFO L85 PathProgramCache]: Analyzing trace with hash -697448124, now seen corresponding path program 14 times [2023-02-15 13:08:00,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:08:00,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921481704] [2023-02-15 13:08:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:08:00,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:08:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:08:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 187929 backedges. 112995 proven. 2066 refuted. 0 times theorem prover too weak. 72868 trivial. 0 not checked. [2023-02-15 13:08:04,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:08:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921481704] [2023-02-15 13:08:04,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921481704] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:08:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921485583] [2023-02-15 13:08:04,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 13:08:04,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:08:04,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:08:04,432 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 13:08:04,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-15 13:08:05,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 13:08:05,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 13:08:05,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 4243 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 13:08:05,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:08:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 187929 backedges. 137142 proven. 11806 refuted. 0 times theorem prover too weak. 38981 trivial. 0 not checked. [2023-02-15 13:08:06,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:08:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 187929 backedges. 137142 proven. 11806 refuted. 0 times theorem prover too weak. 38981 trivial. 0 not checked. [2023-02-15 13:08:08,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921485583] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:08:08,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:08:08,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 86 [2023-02-15 13:08:08,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338827200] [2023-02-15 13:08:08,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:08:08,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-02-15 13:08:08,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:08:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-02-15 13:08:08,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1158, Invalid=6152, Unknown=0, NotChecked=0, Total=7310 [2023-02-15 13:08:08,309 INFO L87 Difference]: Start difference. First operand 1690 states and 1735 transitions. Second operand has 86 states, 86 states have (on average 6.232558139534884) internal successors, (536), 86 states have internal predecessors, (536), 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)