./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/tree_max.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:41:26,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:41:26,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:41:26,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:41:26,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:41:26,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:41:26,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:41:26,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:41:26,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:41:26,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:41:26,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:41:26,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:41:26,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:41:26,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:41:26,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:41:26,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:41:26,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:41:26,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:41:26,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:41:26,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:41:26,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:41:26,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:41:26,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:41:26,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:41:26,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:41:26,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:41:26,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:41:26,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:41:26,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:41:26,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:41:26,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:41:26,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:41:26,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:41:26,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:41:26,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:41:26,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:41:26,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:41:26,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:41:26,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:41:26,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:41:26,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:41:26,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 21:41:26,577 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:41:26,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:41:26,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:41:26,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:41:26,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:41:26,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:41:26,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:41:26,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:41:26,580 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:41:26,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:41:26,581 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:41:26,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:41:26,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:41:26,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:41:26,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 21:41:26,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:41:26,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 21:41:26,583 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:41:26,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 21:41:26,583 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:41:26,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 21:41:26,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:41:26,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:41:26,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:41:26,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:41:26,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:41:26,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:41:26,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 21:41:26,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:41:26,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:41:26,586 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:41:26,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 21:41:26,586 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:41:26,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:41:26,587 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:41:26,587 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2023-02-15 21:41:26,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:41:26,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:41:26,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:41:26,901 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:41:26,901 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:41:26,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2023-02-15 21:41:28,055 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:41:28,266 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:41:28,266 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2023-02-15 21:41:28,272 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/167148929/e499251a5915458db8a83006f2ea1e6a/FLAGdb737652d [2023-02-15 21:41:28,286 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/167148929/e499251a5915458db8a83006f2ea1e6a [2023-02-15 21:41:28,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:41:28,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:41:28,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:41:28,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:41:28,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:41:28,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c35ddc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28, skipping insertion in model container [2023-02-15 21:41:28,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:41:28,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:41:28,451 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2023-02-15 21:41:28,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:41:28,484 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:41:28,494 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2023-02-15 21:41:28,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:41:28,514 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:41:28,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28 WrapperNode [2023-02-15 21:41:28,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:41:28,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:41:28,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:41:28,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:41:28,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,545 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 38 [2023-02-15 21:41:28,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:41:28,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:41:28,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:41:28,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:41:28,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:41:28,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:41:28,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:41:28,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:41:28,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28" (1/1) ... [2023-02-15 21:41:28,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:41:28,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:41:28,613 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 21:41:28,621 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 21:41:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 21:41:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:41:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-02-15 21:41:28,658 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-02-15 21:41:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2023-02-15 21:41:28,658 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2023-02-15 21:41:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:41:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-02-15 21:41:28,659 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-02-15 21:41:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 21:41:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 21:41:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 21:41:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:41:28,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:41:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 21:41:28,757 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:41:28,759 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:41:29,008 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:41:29,022 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:41:29,022 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 21:41:29,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:41:29 BoogieIcfgContainer [2023-02-15 21:41:29,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:41:29,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:41:29,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:41:29,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:41:29,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:41:28" (1/3) ... [2023-02-15 21:41:29,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c0a8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:41:29, skipping insertion in model container [2023-02-15 21:41:29,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:41:28" (2/3) ... [2023-02-15 21:41:29,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c0a8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:41:29, skipping insertion in model container [2023-02-15 21:41:29,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:41:29" (3/3) ... [2023-02-15 21:41:29,031 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2023-02-15 21:41:29,046 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:41:29,046 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 21:41:29,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:41:29,120 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3796a6c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:41:29,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 21:41:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 21:41:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 21:41:29,133 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:41:29,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:41:29,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:41:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:41:29,146 INFO L85 PathProgramCache]: Analyzing trace with hash 998783614, now seen corresponding path program 1 times [2023-02-15 21:41:29,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:41:29,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355338492] [2023-02-15 21:41:29,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:41:29,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:41:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:29,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:29,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 21:41:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:29,669 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 21:41:29,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:41:29,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355338492] [2023-02-15 21:41:29,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355338492] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:41:29,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:41:29,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 21:41:29,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936625751] [2023-02-15 21:41:29,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:41:29,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:41:29,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:41:29,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:41:29,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:41:29,706 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:41:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:41:30,011 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2023-02-15 21:41:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:41:30,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-15 21:41:30,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:41:30,022 INFO L225 Difference]: With dead ends: 74 [2023-02-15 21:41:30,023 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 21:41:30,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:41:30,034 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:41:30,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 100 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:41:30,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 21:41:30,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-15 21:41:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 21:41:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-02-15 21:41:30,088 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2023-02-15 21:41:30,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:41:30,089 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-02-15 21:41:30,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:41:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-02-15 21:41:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 21:41:30,091 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:41:30,091 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:41:30,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 21:41:30,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:41:30,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:41:30,093 INFO L85 PathProgramCache]: Analyzing trace with hash -976273983, now seen corresponding path program 1 times [2023-02-15 21:41:30,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:41:30,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982546480] [2023-02-15 21:41:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:41:30,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:41:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:30,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:30,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:41:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:30,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:41:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:30,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:41:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 21:41:30,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:41:30,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982546480] [2023-02-15 21:41:30,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982546480] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:41:30,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:41:30,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 21:41:30,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082257101] [2023-02-15 21:41:30,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:41:30,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 21:41:30,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:41:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 21:41:30,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:41:30,428 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:41:30,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:41:30,631 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2023-02-15 21:41:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 21:41:30,633 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-02-15 21:41:30,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:41:30,636 INFO L225 Difference]: With dead ends: 48 [2023-02-15 21:41:30,641 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 21:41:30,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:41:30,647 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:41:30,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 92 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:41:30,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 21:41:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-15 21:41:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-15 21:41:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-02-15 21:41:30,660 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2023-02-15 21:41:30,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:41:30,660 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-02-15 21:41:30,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:41:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-02-15 21:41:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 21:41:30,663 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:41:30,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:41:30,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 21:41:30,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:41:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:41:30,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1376325807, now seen corresponding path program 1 times [2023-02-15 21:41:30,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:41:30,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473345939] [2023-02-15 21:41:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:41:30,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:41:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:31,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:31,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:41:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:31,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:41:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:31,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:41:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:31,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:31,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:41:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:41:31,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:41:31,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473345939] [2023-02-15 21:41:31,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473345939] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:41:31,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748463230] [2023-02-15 21:41:31,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:41:31,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:41:31,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:41:31,433 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 21:41:31,471 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 21:41:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:31,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 21:41:31,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:41:31,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 21:41:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 21:41:31,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:41:32,053 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-02-15 21:41:32,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 21:41:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:41:32,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748463230] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:41:32,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:41:32,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2023-02-15 21:41:32,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710574835] [2023-02-15 21:41:32,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:41:32,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 21:41:32,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:41:32,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 21:41:32,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-02-15 21:41:32,095 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-15 21:41:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:41:32,587 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-15 21:41:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 21:41:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2023-02-15 21:41:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:41:32,593 INFO L225 Difference]: With dead ends: 46 [2023-02-15 21:41:32,593 INFO L226 Difference]: Without dead ends: 44 [2023-02-15 21:41:32,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:41:32,597 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 72 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:41:32,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 153 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:41:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-15 21:41:32,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2023-02-15 21:41:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-15 21:41:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2023-02-15 21:41:32,619 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 41 [2023-02-15 21:41:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:41:32,620 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2023-02-15 21:41:32,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-15 21:41:32,621 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2023-02-15 21:41:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 21:41:32,623 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:41:32,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:41:32,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 21:41:32,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:41:32,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:41:32,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:41:32,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2126921006, now seen corresponding path program 1 times [2023-02-15 21:41:32,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:41:32,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868995128] [2023-02-15 21:41:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:41:32,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:41:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:33,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:33,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:41:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:33,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:41:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:33,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:41:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:33,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:33,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:41:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:41:33,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:41:33,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868995128] [2023-02-15 21:41:33,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868995128] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:41:33,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567525294] [2023-02-15 21:41:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:41:33,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:41:33,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:41:33,609 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 21:41:33,619 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 21:41:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:33,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-15 21:41:33,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:41:33,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:41:33,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:41:34,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 21:41:34,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 21:41:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:41:34,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:41:36,305 WARN L837 $PredicateComparison]: unable to prove that (or (and (forall ((|v_max_#in~n.base_BEFORE_CALL_8| Int) (|v_max_#in~n.offset_BEFORE_CALL_8| Int)) (= 0 (select (select |c_#memory_$Pointer$.offset| |v_max_#in~n.base_BEFORE_CALL_8|) (+ |v_max_#in~n.offset_BEFORE_CALL_8| 4)))) (forall ((|v_max_#in~n.base_BEFORE_CALL_8| Int) (|v_max_#in~n.offset_BEFORE_CALL_8| Int)) (= (select (select |c_#memory_$Pointer$.base| |v_max_#in~n.base_BEFORE_CALL_8|) (+ |v_max_#in~n.offset_BEFORE_CALL_8| 4)) 0))) (and (= |c_max_#in~n.offset| 0) (= 0 |c_max_#in~n.base|))) is different from false [2023-02-15 21:41:42,402 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:41:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2023-02-15 21:41:42,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567525294] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:41:42,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:41:42,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 13] total 29 [2023-02-15 21:41:42,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683490519] [2023-02-15 21:41:42,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:41:42,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 21:41:42,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:41:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 21:41:42,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=682, Unknown=1, NotChecked=52, Total=812 [2023-02-15 21:41:42,493 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-02-15 21:41:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:41:43,757 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2023-02-15 21:41:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 21:41:43,758 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 47 [2023-02-15 21:41:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:41:43,760 INFO L225 Difference]: With dead ends: 72 [2023-02-15 21:41:43,760 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 21:41:43,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 89 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=251, Invalid=1914, Unknown=1, NotChecked=90, Total=2256 [2023-02-15 21:41:43,761 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 134 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:41:43,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 283 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 913 Invalid, 0 Unknown, 61 Unchecked, 0.6s Time] [2023-02-15 21:41:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 21:41:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-02-15 21:41:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.225) internal successors, (49), 43 states have internal predecessors, (49), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2023-02-15 21:41:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2023-02-15 21:41:43,772 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 47 [2023-02-15 21:41:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:41:43,772 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2023-02-15 21:41:43,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-02-15 21:41:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2023-02-15 21:41:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 21:41:43,774 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:41:43,775 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:41:43,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 21:41:43,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-15 21:41:43,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:41:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:41:43,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2051682644, now seen corresponding path program 1 times [2023-02-15 21:41:43,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:41:43,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191201138] [2023-02-15 21:41:43,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:41:43,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:41:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:44,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:44,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:41:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:44,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:41:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:44,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:41:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:44,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:44,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:41:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:41:44,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:41:44,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191201138] [2023-02-15 21:41:44,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191201138] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:41:44,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330201354] [2023-02-15 21:41:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:41:44,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:41:44,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:41:44,553 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 21:41:44,576 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 21:41:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-15 21:41:44,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:41:44,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 21:41:44,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 21:41:44,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 21:41:44,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 21:41:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:41:44,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:41:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:41:45,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330201354] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:41:45,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:41:45,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 21 [2023-02-15 21:41:45,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048289734] [2023-02-15 21:41:45,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:41:45,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 21:41:45,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:41:45,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 21:41:45,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:41:45,203 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 13 states have internal predecessors, (49), 6 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2023-02-15 21:41:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:41:45,969 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2023-02-15 21:41:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 21:41:45,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 13 states have internal predecessors, (49), 6 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) Word has length 47 [2023-02-15 21:41:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:41:45,971 INFO L225 Difference]: With dead ends: 132 [2023-02-15 21:41:45,971 INFO L226 Difference]: Without dead ends: 113 [2023-02-15 21:41:45,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 21:41:45,974 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:41:45,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 203 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:41:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-15 21:41:45,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2023-02-15 21:41:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 69 states have internal predecessors, (80), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (35), 16 states have call predecessors, (35), 13 states have call successors, (35) [2023-02-15 21:41:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2023-02-15 21:41:45,991 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 47 [2023-02-15 21:41:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:41:45,991 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2023-02-15 21:41:45,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 13 states have internal predecessors, (49), 6 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2023-02-15 21:41:45,992 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2023-02-15 21:41:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 21:41:45,994 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:41:45,994 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:41:46,003 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 21:41:46,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:41:46,203 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:41:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:41:46,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1292352465, now seen corresponding path program 2 times [2023-02-15 21:41:46,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:41:46,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929216580] [2023-02-15 21:41:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:41:46,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:41:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:46,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:46,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:41:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:46,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:41:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:46,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:41:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:46,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:41:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:46,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 21:41:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:46,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:46,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:41:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 21:41:46,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:41:46,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929216580] [2023-02-15 21:41:46,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929216580] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:41:46,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399023486] [2023-02-15 21:41:46,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:41:46,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:41:46,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:41:46,805 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 21:41:46,808 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 21:41:46,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:41:46,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:41:46,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-15 21:41:46,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:41:46,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 21:41:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 21:41:47,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:41:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 21:41:47,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399023486] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:41:47,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:41:47,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 30 [2023-02-15 21:41:47,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011079147] [2023-02-15 21:41:47,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:41:47,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 21:41:47,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:41:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 21:41:47,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-02-15 21:41:47,597 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand has 30 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 12 states have call successors, (23), 4 states have call predecessors, (23), 11 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2023-02-15 21:41:50,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 21:41:52,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 21:41:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:41:53,319 INFO L93 Difference]: Finished difference Result 147 states and 210 transitions. [2023-02-15 21:41:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 21:41:53,321 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 12 states have call successors, (23), 4 states have call predecessors, (23), 11 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) Word has length 57 [2023-02-15 21:41:53,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:41:53,322 INFO L225 Difference]: With dead ends: 147 [2023-02-15 21:41:53,323 INFO L226 Difference]: Without dead ends: 126 [2023-02-15 21:41:53,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 21:41:53,324 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 129 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 65 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:41:53,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 305 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1204 Invalid, 3 Unknown, 0 Unchecked, 5.2s Time] [2023-02-15 21:41:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-15 21:41:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2023-02-15 21:41:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 73 states have internal predecessors, (86), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (39), 17 states have call predecessors, (39), 13 states have call successors, (39) [2023-02-15 21:41:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 143 transitions. [2023-02-15 21:41:53,348 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 143 transitions. Word has length 57 [2023-02-15 21:41:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:41:53,349 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 143 transitions. [2023-02-15 21:41:53,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 12 states have call successors, (23), 4 states have call predecessors, (23), 11 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2023-02-15 21:41:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 143 transitions. [2023-02-15 21:41:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 21:41:53,351 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:41:53,351 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:41:53,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 21:41:53,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:41:53,557 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:41:53,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:41:53,558 INFO L85 PathProgramCache]: Analyzing trace with hash -666655302, now seen corresponding path program 2 times [2023-02-15 21:41:53,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:41:53,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301566897] [2023-02-15 21:41:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:41:53,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:41:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:53,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:54,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:41:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:54,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:41:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:54,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:41:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:54,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:54,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:54,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:41:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:54,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 21:41:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 21:41:54,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:41:54,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301566897] [2023-02-15 21:41:54,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301566897] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:41:54,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726681113] [2023-02-15 21:41:54,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:41:54,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:41:54,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:41:54,181 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 21:41:54,184 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 21:41:54,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:41:54,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:41:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-15 21:41:54,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:41:54,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-02-15 21:41:54,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-02-15 21:41:54,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 21:41:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 21:41:54,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:41:55,193 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-15 21:41:55,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2023-02-15 21:41:55,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726681113] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:41:55,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:41:55,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2023-02-15 21:41:55,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878976526] [2023-02-15 21:41:55,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:41:55,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 21:41:55,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:41:55,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 21:41:55,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1051, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:41:55,370 INFO L87 Difference]: Start difference. First operand 100 states and 143 transitions. Second operand has 31 states, 26 states have (on average 2.076923076923077) internal successors, (54), 22 states have internal predecessors, (54), 10 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-15 21:41:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:41:57,142 INFO L93 Difference]: Finished difference Result 170 states and 241 transitions. [2023-02-15 21:41:57,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 21:41:57,143 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 2.076923076923077) internal successors, (54), 22 states have internal predecessors, (54), 10 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) Word has length 60 [2023-02-15 21:41:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:41:57,147 INFO L225 Difference]: With dead ends: 170 [2023-02-15 21:41:57,147 INFO L226 Difference]: Without dead ends: 139 [2023-02-15 21:41:57,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 81 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=319, Invalid=3587, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 21:41:57,150 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 92 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 21:41:57,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 306 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1859 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 21:41:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-15 21:41:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 124. [2023-02-15 21:41:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 91 states have internal predecessors, (104), 22 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (55), 21 states have call predecessors, (55), 14 states have call successors, (55) [2023-02-15 21:41:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 181 transitions. [2023-02-15 21:41:57,169 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 181 transitions. Word has length 60 [2023-02-15 21:41:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:41:57,169 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 181 transitions. [2023-02-15 21:41:57,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 2.076923076923077) internal successors, (54), 22 states have internal predecessors, (54), 10 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-15 21:41:57,170 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 181 transitions. [2023-02-15 21:41:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 21:41:57,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:41:57,172 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:41:57,184 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 21:41:57,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:41:57,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:41:57,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:41:57,381 INFO L85 PathProgramCache]: Analyzing trace with hash -945278837, now seen corresponding path program 3 times [2023-02-15 21:41:57,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:41:57,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938819881] [2023-02-15 21:41:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:41:57,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:41:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:58,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:58,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:41:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:58,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:41:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:58,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:41:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:58,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:41:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:58,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 21:41:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:58,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:58,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:41:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:58,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:41:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:58,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:41:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:41:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 21:41:58,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:41:58,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938819881] [2023-02-15 21:41:58,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938819881] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:41:58,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233263579] [2023-02-15 21:41:58,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:41:58,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:41:58,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:41:58,717 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 21:41:58,740 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 21:41:58,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 21:41:58,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:41:58,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-15 21:41:58,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:41:58,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 21:41:59,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-15 21:41:59,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-02-15 21:42:00,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-15 21:42:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 21:42:00,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:42:00,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:42:00,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2023-02-15 21:42:00,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233263579] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:42:00,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:42:00,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 48 [2023-02-15 21:42:00,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021832990] [2023-02-15 21:42:00,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:42:00,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 21:42:00,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:42:00,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 21:42:00,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3115, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 21:42:00,888 INFO L87 Difference]: Start difference. First operand 124 states and 181 transitions. Second operand has 48 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 36 states have internal predecessors, (67), 15 states have call successors, (20), 7 states have call predecessors, (20), 11 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-15 21:42:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:42:03,761 INFO L93 Difference]: Finished difference Result 250 states and 468 transitions. [2023-02-15 21:42:03,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 21:42:03,762 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 36 states have internal predecessors, (67), 15 states have call successors, (20), 7 states have call predecessors, (20), 11 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) Word has length 70 [2023-02-15 21:42:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:42:03,766 INFO L225 Difference]: With dead ends: 250 [2023-02-15 21:42:03,766 INFO L226 Difference]: Without dead ends: 248 [2023-02-15 21:42:03,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=668, Invalid=7888, Unknown=0, NotChecked=0, Total=8556 [2023-02-15 21:42:03,769 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 192 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 2174 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:42:03,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 410 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2174 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 21:42:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-02-15 21:42:03,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 173. [2023-02-15 21:42:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 121 states have (on average 1.2231404958677685) internal successors, (148), 128 states have internal predecessors, (148), 28 states have call successors, (28), 14 states have call predecessors, (28), 23 states have return successors, (109), 30 states have call predecessors, (109), 17 states have call successors, (109) [2023-02-15 21:42:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 285 transitions. [2023-02-15 21:42:03,802 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 285 transitions. Word has length 70 [2023-02-15 21:42:03,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:42:03,803 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 285 transitions. [2023-02-15 21:42:03,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 36 states have internal predecessors, (67), 15 states have call successors, (20), 7 states have call predecessors, (20), 11 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-15 21:42:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 285 transitions. [2023-02-15 21:42:03,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 21:42:03,805 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:42:03,805 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:42:03,816 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 21:42:04,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:42:04,012 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:42:04,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:42:04,012 INFO L85 PathProgramCache]: Analyzing trace with hash -909256420, now seen corresponding path program 1 times [2023-02-15 21:42:04,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:42:04,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335571865] [2023-02-15 21:42:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:42:04,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:42:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:04,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:04,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:42:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:04,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:42:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:04,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:42:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:04,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:42:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:04,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 21:42:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:05,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:05,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:42:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:05,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:05,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:42:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 21:42:05,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:42:05,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335571865] [2023-02-15 21:42:05,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335571865] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:42:05,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368013074] [2023-02-15 21:42:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:42:05,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:42:05,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:42:05,497 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 21:42:05,521 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 21:42:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-15 21:42:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:42:05,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:42:05,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:42:06,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-02-15 21:42:06,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-15 21:42:06,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-15 21:42:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-15 21:42:06,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:42:06,931 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-15 21:42:06,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2023-02-15 21:42:07,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368013074] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:42:07,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:42:07,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 46 [2023-02-15 21:42:07,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143049356] [2023-02-15 21:42:07,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:42:07,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 21:42:07,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:42:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 21:42:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2822, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 21:42:07,127 INFO L87 Difference]: Start difference. First operand 173 states and 285 transitions. Second operand has 46 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 33 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-15 21:42:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:42:10,802 INFO L93 Difference]: Finished difference Result 303 states and 530 transitions. [2023-02-15 21:42:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-15 21:42:10,803 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 33 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 71 [2023-02-15 21:42:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:42:10,806 INFO L225 Difference]: With dead ends: 303 [2023-02-15 21:42:10,806 INFO L226 Difference]: Without dead ends: 301 [2023-02-15 21:42:10,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=626, Invalid=8116, Unknown=0, NotChecked=0, Total=8742 [2023-02-15 21:42:10,809 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 171 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 2895 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 2980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:42:10,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 376 Invalid, 2980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2895 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-15 21:42:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-02-15 21:42:10,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 182. [2023-02-15 21:42:10,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 128 states have (on average 1.21875) internal successors, (156), 135 states have internal predecessors, (156), 29 states have call successors, (29), 15 states have call predecessors, (29), 24 states have return successors, (115), 31 states have call predecessors, (115), 17 states have call successors, (115) [2023-02-15 21:42:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 300 transitions. [2023-02-15 21:42:10,840 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 300 transitions. Word has length 71 [2023-02-15 21:42:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:42:10,840 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 300 transitions. [2023-02-15 21:42:10,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 33 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-15 21:42:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 300 transitions. [2023-02-15 21:42:10,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 21:42:10,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:42:10,842 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:42:10,848 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 21:42:11,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:42:11,048 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:42:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:42:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1931785932, now seen corresponding path program 2 times [2023-02-15 21:42:11,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:42:11,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340882998] [2023-02-15 21:42:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:42:11,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:42:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:11,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:11,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:42:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:11,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:42:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:11,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:42:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:11,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:42:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:11,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 21:42:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:11,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:11,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:42:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:11,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:11,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:42:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 21:42:11,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:42:11,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340882998] [2023-02-15 21:42:11,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340882998] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:42:11,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944900956] [2023-02-15 21:42:11,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:42:11,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:42:11,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:42:11,319 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 21:42:11,346 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 21:42:11,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:42:11,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:42:11,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 21:42:11,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:42:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 21:42:11,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:42:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 21:42:11,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944900956] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:42:11,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:42:11,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 21 [2023-02-15 21:42:11,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655286499] [2023-02-15 21:42:11,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:42:11,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 21:42:11,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:42:11,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 21:42:11,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:42:11,951 INFO L87 Difference]: Start difference. First operand 182 states and 300 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 21:42:12,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:42:12,897 INFO L93 Difference]: Finished difference Result 395 states and 792 transitions. [2023-02-15 21:42:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 21:42:12,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 71 [2023-02-15 21:42:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:42:12,904 INFO L225 Difference]: With dead ends: 395 [2023-02-15 21:42:12,904 INFO L226 Difference]: Without dead ends: 253 [2023-02-15 21:42:12,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 152 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 21:42:12,906 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:42:12,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 216 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:42:12,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-02-15 21:42:12,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 212. [2023-02-15 21:42:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 152 states have (on average 1.1907894736842106) internal successors, (181), 156 states have internal predecessors, (181), 30 states have call successors, (30), 15 states have call predecessors, (30), 29 states have return successors, (147), 40 states have call predecessors, (147), 18 states have call successors, (147) [2023-02-15 21:42:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 358 transitions. [2023-02-15 21:42:12,941 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 358 transitions. Word has length 71 [2023-02-15 21:42:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:42:12,941 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 358 transitions. [2023-02-15 21:42:12,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 21:42:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 358 transitions. [2023-02-15 21:42:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-15 21:42:12,944 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:42:12,944 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:42:12,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 21:42:13,150 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,SelfDestructingSolverStorable9 [2023-02-15 21:42:13,150 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:42:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:42:13,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1914561797, now seen corresponding path program 1 times [2023-02-15 21:42:13,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:42:13,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98623802] [2023-02-15 21:42:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:42:13,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:42:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:13,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:13,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:42:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:13,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:42:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:14,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:42:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:14,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:42:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:14,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 21:42:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:14,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:14,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:42:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:14,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:14,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:42:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 21:42:14,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:42:14,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98623802] [2023-02-15 21:42:14,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98623802] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:42:14,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610185259] [2023-02-15 21:42:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:42:14,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:42:14,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:42:14,529 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 21:42:14,532 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 21:42:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:14,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-15 21:42:14,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:42:14,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:42:14,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:42:14,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:42:15,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-02-15 21:42:15,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-15 21:42:15,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:42:15,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2023-02-15 21:42:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 29 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-15 21:42:15,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:42:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-15 21:42:17,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610185259] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:42:17,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:42:17,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 29] total 76 [2023-02-15 21:42:17,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311470711] [2023-02-15 21:42:17,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:42:17,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-15 21:42:17,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:42:17,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-15 21:42:17,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=5426, Unknown=0, NotChecked=0, Total=5700 [2023-02-15 21:42:17,774 INFO L87 Difference]: Start difference. First operand 212 states and 358 transitions. Second operand has 76 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 53 states have internal predecessors, (91), 22 states have call successors, (29), 8 states have call predecessors, (29), 10 states have return successors, (23), 20 states have call predecessors, (23), 16 states have call successors, (23) [2023-02-15 21:42:21,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:42:21,692 INFO L93 Difference]: Finished difference Result 277 states and 481 transitions. [2023-02-15 21:42:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 21:42:21,693 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 53 states have internal predecessors, (91), 22 states have call successors, (29), 8 states have call predecessors, (29), 10 states have return successors, (23), 20 states have call predecessors, (23), 16 states have call successors, (23) Word has length 72 [2023-02-15 21:42:21,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:42:21,695 INFO L225 Difference]: With dead ends: 277 [2023-02-15 21:42:21,696 INFO L226 Difference]: Without dead ends: 275 [2023-02-15 21:42:21,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 114 SyntacticMatches, 8 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1008, Invalid=13512, Unknown=0, NotChecked=0, Total=14520 [2023-02-15 21:42:21,700 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 212 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 2983 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:42:21,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 426 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2983 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 21:42:21,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-02-15 21:42:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 213. [2023-02-15 21:42:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 153 states have (on average 1.196078431372549) internal successors, (183), 157 states have internal predecessors, (183), 30 states have call successors, (30), 15 states have call predecessors, (30), 29 states have return successors, (147), 40 states have call predecessors, (147), 18 states have call successors, (147) [2023-02-15 21:42:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 360 transitions. [2023-02-15 21:42:21,731 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 360 transitions. Word has length 72 [2023-02-15 21:42:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:42:21,731 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 360 transitions. [2023-02-15 21:42:21,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 53 states have internal predecessors, (91), 22 states have call successors, (29), 8 states have call predecessors, (29), 10 states have return successors, (23), 20 states have call predecessors, (23), 16 states have call successors, (23) [2023-02-15 21:42:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 360 transitions. [2023-02-15 21:42:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 21:42:21,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:42:21,734 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:42:21,739 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 21:42:21,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:42:21,939 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:42:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:42:21,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1086227410, now seen corresponding path program 1 times [2023-02-15 21:42:21,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:42:21,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336263039] [2023-02-15 21:42:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:42:21,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:42:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:22,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:22,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:42:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:22,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:42:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:22,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:42:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:22,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:42:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:22,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 21:42:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:22,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:22,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:22,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:42:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:22,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 21:42:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 21:42:23,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:42:23,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336263039] [2023-02-15 21:42:23,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336263039] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:42:23,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595060182] [2023-02-15 21:42:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:42:23,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:42:23,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:42:23,013 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 21:42:23,037 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 21:42:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:23,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-15 21:42:23,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:42:23,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:42:23,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:42:23,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-15 21:42:23,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-15 21:42:24,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-15 21:42:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 21:42:24,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:42:24,574 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-15 21:42:24,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2023-02-15 21:42:24,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595060182] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:42:24,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:42:24,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23] total 43 [2023-02-15 21:42:24,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043125346] [2023-02-15 21:42:24,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:42:24,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 21:42:24,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:42:24,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 21:42:24,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2512, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 21:42:24,782 INFO L87 Difference]: Start difference. First operand 213 states and 360 transitions. Second operand has 43 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 15 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-15 21:42:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:42:30,852 INFO L93 Difference]: Finished difference Result 607 states and 1278 transitions. [2023-02-15 21:42:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-02-15 21:42:30,852 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 15 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) Word has length 71 [2023-02-15 21:42:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:42:30,859 INFO L225 Difference]: With dead ends: 607 [2023-02-15 21:42:30,859 INFO L226 Difference]: Without dead ends: 605 [2023-02-15 21:42:30,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 110 SyntacticMatches, 7 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4499 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1394, Invalid=17238, Unknown=0, NotChecked=0, Total=18632 [2023-02-15 21:42:30,862 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 274 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 3870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-15 21:42:30,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 360 Invalid, 3870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-15 21:42:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2023-02-15 21:42:30,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 350. [2023-02-15 21:42:30,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 248 states have (on average 1.217741935483871) internal successors, (302), 267 states have internal predecessors, (302), 40 states have call successors, (40), 17 states have call predecessors, (40), 61 states have return successors, (458), 65 states have call predecessors, (458), 28 states have call successors, (458) [2023-02-15 21:42:30,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 800 transitions. [2023-02-15 21:42:30,922 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 800 transitions. Word has length 71 [2023-02-15 21:42:30,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:42:30,922 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 800 transitions. [2023-02-15 21:42:30,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 15 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-15 21:42:30,922 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 800 transitions. [2023-02-15 21:42:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-15 21:42:30,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:42:30,927 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:42:30,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 21:42:31,135 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,SelfDestructingSolverStorable11 [2023-02-15 21:42:31,136 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:42:31,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:42:31,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1479346186, now seen corresponding path program 1 times [2023-02-15 21:42:31,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:42:31,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21263824] [2023-02-15 21:42:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:42:31,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:42:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:31,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:32,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:42:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:32,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:42:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:32,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:42:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:32,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:42:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:32,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 21:42:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:32,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:32,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:42:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:32,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:32,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:42:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 21:42:32,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:42:32,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21263824] [2023-02-15 21:42:32,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21263824] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:42:32,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517432572] [2023-02-15 21:42:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:42:32,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:42:32,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:42:32,461 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 21:42:32,489 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 21:42:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-15 21:42:32,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:42:32,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 21:42:32,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:42:33,409 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:42:33,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:42:33,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:42:33,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 33 [2023-02-15 21:42:33,421 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-02-15 21:42:33,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2023-02-15 21:42:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 21:42:33,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:42:48,028 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:42:48,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517432572] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:42:48,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:42:48,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 38 [2023-02-15 21:42:48,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905531750] [2023-02-15 21:42:48,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:42:48,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 21:42:48,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:42:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 21:42:48,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2012, Unknown=2, NotChecked=0, Total=2162 [2023-02-15 21:42:48,059 INFO L87 Difference]: Start difference. First operand 350 states and 800 transitions. Second operand has 38 states, 30 states have (on average 2.466666666666667) internal successors, (74), 30 states have internal predecessors, (74), 15 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-15 21:42:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:42:50,525 INFO L93 Difference]: Finished difference Result 552 states and 1281 transitions. [2023-02-15 21:42:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 21:42:50,526 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 30 states have (on average 2.466666666666667) internal successors, (74), 30 states have internal predecessors, (74), 15 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 76 [2023-02-15 21:42:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:42:50,532 INFO L225 Difference]: With dead ends: 552 [2023-02-15 21:42:50,532 INFO L226 Difference]: Without dead ends: 540 [2023-02-15 21:42:50,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=535, Invalid=5625, Unknown=2, NotChecked=0, Total=6162 [2023-02-15 21:42:50,534 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 149 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 96 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:42:50,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 341 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2145 Invalid, 4 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 21:42:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-02-15 21:42:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 451. [2023-02-15 21:42:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 325 states have (on average 1.2153846153846153) internal successors, (395), 348 states have internal predecessors, (395), 47 states have call successors, (47), 23 states have call predecessors, (47), 78 states have return successors, (614), 79 states have call predecessors, (614), 28 states have call successors, (614) [2023-02-15 21:42:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1056 transitions. [2023-02-15 21:42:50,603 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1056 transitions. Word has length 76 [2023-02-15 21:42:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:42:50,604 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 1056 transitions. [2023-02-15 21:42:50,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 30 states have (on average 2.466666666666667) internal successors, (74), 30 states have internal predecessors, (74), 15 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-15 21:42:50,604 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1056 transitions. [2023-02-15 21:42:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-15 21:42:50,609 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:42:50,609 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:42:50,619 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 21:42:50,815 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,SelfDestructingSolverStorable12 [2023-02-15 21:42:50,815 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:42:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:42:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1595709832, now seen corresponding path program 4 times [2023-02-15 21:42:50,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:42:50,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38018013] [2023-02-15 21:42:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:42:50,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:42:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:51,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:51,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:42:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:51,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:42:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:51,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:42:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:51,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:42:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:51,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 21:42:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:51,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:51,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:42:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:51,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:42:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:51,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:42:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:42:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-15 21:42:51,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:42:51,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38018013] [2023-02-15 21:42:51,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38018013] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:42:51,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235557286] [2023-02-15 21:42:51,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:42:51,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:42:51,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:42:51,900 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 21:42:51,927 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 21:42:52,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:42:52,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:42:52,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-15 21:42:52,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:42:52,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:42:52,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 21:42:52,781 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:42:52,791 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-02-15 21:42:52,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2023-02-15 21:42:52,800 INFO L321 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2023-02-15 21:42:52,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2023-02-15 21:42:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-15 21:42:52,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:43:05,364 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:43:15,480 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:43:15,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235557286] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:43:15,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:43:15,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 36 [2023-02-15 21:43:15,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787478107] [2023-02-15 21:43:15,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:43:15,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 21:43:15,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:43:15,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 21:43:15,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1923, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 21:43:15,482 INFO L87 Difference]: Start difference. First operand 451 states and 1056 transitions. Second operand has 36 states, 31 states have (on average 2.161290322580645) internal successors, (67), 26 states have internal predecessors, (67), 11 states have call successors, (18), 7 states have call predecessors, (18), 11 states have return successors, (16), 13 states have call predecessors, (16), 8 states have call successors, (16) [2023-02-15 21:43:18,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:43:18,107 INFO L93 Difference]: Finished difference Result 1238 states and 3627 transitions. [2023-02-15 21:43:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-15 21:43:18,108 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 2.161290322580645) internal successors, (67), 26 states have internal predecessors, (67), 11 states have call successors, (18), 7 states have call predecessors, (18), 11 states have return successors, (16), 13 states have call predecessors, (16), 8 states have call successors, (16) Word has length 76 [2023-02-15 21:43:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:43:18,121 INFO L225 Difference]: With dead ends: 1238 [2023-02-15 21:43:18,121 INFO L226 Difference]: Without dead ends: 887 [2023-02-15 21:43:18,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=573, Invalid=6737, Unknown=0, NotChecked=0, Total=7310 [2023-02-15 21:43:18,126 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 155 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 2224 mSolverCounterSat, 116 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2224 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:43:18,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 261 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2224 Invalid, 6 Unknown, 0 Unchecked, 1.3s Time] [2023-02-15 21:43:18,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-02-15 21:43:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 718. [2023-02-15 21:43:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 520 states have (on average 1.2076923076923076) internal successors, (628), 554 states have internal predecessors, (628), 73 states have call successors, (73), 38 states have call predecessors, (73), 124 states have return successors, (1313), 125 states have call predecessors, (1313), 43 states have call successors, (1313) [2023-02-15 21:43:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 2014 transitions. [2023-02-15 21:43:18,282 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 2014 transitions. Word has length 76 [2023-02-15 21:43:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:43:18,283 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 2014 transitions. [2023-02-15 21:43:18,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 2.161290322580645) internal successors, (67), 26 states have internal predecessors, (67), 11 states have call successors, (18), 7 states have call predecessors, (18), 11 states have return successors, (16), 13 states have call predecessors, (16), 8 states have call successors, (16) [2023-02-15 21:43:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 2014 transitions. [2023-02-15 21:43:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-15 21:43:18,291 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:43:18,291 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:43:18,300 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 21:43:18,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 21:43:18,498 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:43:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:43:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash 191480931, now seen corresponding path program 1 times [2023-02-15 21:43:18,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:43:18,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260602595] [2023-02-15 21:43:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:43:18,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:43:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:18,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:19,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:19,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:19,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:19,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:43:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:19,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 21:43:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:19,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:19,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:19,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:43:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:19,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:43:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 21:43:19,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:43:19,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260602595] [2023-02-15 21:43:19,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260602595] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:43:19,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499047636] [2023-02-15 21:43:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:43:19,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:43:19,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:43:19,537 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 21:43:19,543 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 21:43:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:19,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-15 21:43:19,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:43:19,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:43:19,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:43:19,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:43:20,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-15 21:43:20,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-15 21:43:20,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 21:43:20,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2023-02-15 21:43:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-15 21:43:20,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:43:22,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499047636] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:43:22,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:43:22,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 53 [2023-02-15 21:43:22,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879176328] [2023-02-15 21:43:22,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:43:22,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 21:43:22,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:43:22,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 21:43:22,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=4986, Unknown=0, NotChecked=0, Total=5256 [2023-02-15 21:43:22,510 INFO L87 Difference]: Start difference. First operand 718 states and 2014 transitions. Second operand has 53 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 39 states have internal predecessors, (66), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-15 21:43:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:43:26,024 INFO L93 Difference]: Finished difference Result 812 states and 2334 transitions. [2023-02-15 21:43:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-15 21:43:26,025 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 39 states have internal predecessors, (66), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 72 [2023-02-15 21:43:26,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:43:26,035 INFO L225 Difference]: With dead ends: 812 [2023-02-15 21:43:26,036 INFO L226 Difference]: Without dead ends: 810 [2023-02-15 21:43:26,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2843 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=958, Invalid=11698, Unknown=0, NotChecked=0, Total=12656 [2023-02-15 21:43:26,038 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 166 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 2664 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:43:26,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 430 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2664 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 21:43:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2023-02-15 21:43:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 718. [2023-02-15 21:43:26,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 520 states have (on average 1.2076923076923076) internal successors, (628), 554 states have internal predecessors, (628), 73 states have call successors, (73), 38 states have call predecessors, (73), 124 states have return successors, (1313), 125 states have call predecessors, (1313), 43 states have call successors, (1313) [2023-02-15 21:43:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 2014 transitions. [2023-02-15 21:43:26,208 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 2014 transitions. Word has length 72 [2023-02-15 21:43:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:43:26,208 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 2014 transitions. [2023-02-15 21:43:26,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 39 states have internal predecessors, (66), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-15 21:43:26,209 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 2014 transitions. [2023-02-15 21:43:26,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-15 21:43:26,220 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:43:26,220 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:43:26,233 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 21:43:26,426 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,SelfDestructingSolverStorable14 [2023-02-15 21:43:26,427 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:43:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:43:26,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1036995691, now seen corresponding path program 3 times [2023-02-15 21:43:26,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:43:26,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539400210] [2023-02-15 21:43:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:43:26,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:43:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-15 21:43:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:43:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:43:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:43:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-02-15 21:43:26,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:43:26,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539400210] [2023-02-15 21:43:26,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539400210] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:43:26,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499213118] [2023-02-15 21:43:26,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:43:26,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:43:26,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:43:26,781 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 21:43:26,800 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 21:43:27,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 21:43:27,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:43:27,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 21:43:27,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:43:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-15 21:43:27,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:43:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-15 21:43:27,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499213118] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:43:27,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:43:27,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 23 [2023-02-15 21:43:27,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996612405] [2023-02-15 21:43:27,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:43:27,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 21:43:27,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:43:27,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 21:43:27,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2023-02-15 21:43:27,967 INFO L87 Difference]: Start difference. First operand 718 states and 2014 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 15 states have internal predecessors, (46), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (14), 11 states have call predecessors, (14), 4 states have call successors, (14) [2023-02-15 21:43:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:43:28,948 INFO L93 Difference]: Finished difference Result 1428 states and 5027 transitions. [2023-02-15 21:43:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 21:43:28,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 15 states have internal predecessors, (46), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (14), 11 states have call predecessors, (14), 4 states have call successors, (14) Word has length 94 [2023-02-15 21:43:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:43:28,960 INFO L225 Difference]: With dead ends: 1428 [2023-02-15 21:43:28,960 INFO L226 Difference]: Without dead ends: 760 [2023-02-15 21:43:28,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 203 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=1856, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 21:43:28,971 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:43:28,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 266 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:43:28,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2023-02-15 21:43:29,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 692. [2023-02-15 21:43:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 502 states have (on average 1.197211155378486) internal successors, (601), 533 states have internal predecessors, (601), 73 states have call successors, (73), 38 states have call predecessors, (73), 116 states have return successors, (1221), 120 states have call predecessors, (1221), 43 states have call successors, (1221) [2023-02-15 21:43:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1895 transitions. [2023-02-15 21:43:29,140 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1895 transitions. Word has length 94 [2023-02-15 21:43:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:43:29,142 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 1895 transitions. [2023-02-15 21:43:29,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 15 states have internal predecessors, (46), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (14), 11 states have call predecessors, (14), 4 states have call successors, (14) [2023-02-15 21:43:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1895 transitions. [2023-02-15 21:43:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-15 21:43:29,152 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:43:29,152 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:43:29,163 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 21:43:29,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:43:29,360 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:43:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:43:29,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1823936658, now seen corresponding path program 4 times [2023-02-15 21:43:29,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:43:29,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262839449] [2023-02-15 21:43:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:43:29,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:43:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-15 21:43:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:43:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:43:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:43:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:43:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 74 proven. 30 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-02-15 21:43:30,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:43:30,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262839449] [2023-02-15 21:43:30,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262839449] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:43:30,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743546751] [2023-02-15 21:43:30,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:43:30,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:43:30,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:43:30,896 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 21:43:30,898 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 21:43:31,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:43:31,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:43:31,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-15 21:43:31,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:43:31,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:43:31,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:43:31,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-02-15 21:43:31,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-02-15 21:43:31,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 21:43:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 60 proven. 32 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2023-02-15 21:43:31,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:43:32,168 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-15 21:43:32,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2023-02-15 21:43:32,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743546751] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:43:32,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:43:32,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 44 [2023-02-15 21:43:32,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642460878] [2023-02-15 21:43:32,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:43:32,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 21:43:32,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:43:32,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 21:43:32,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 21:43:32,301 INFO L87 Difference]: Start difference. First operand 692 states and 1895 transitions. Second operand has 44 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 32 states have internal predecessors, (68), 15 states have call successors, (26), 6 states have call predecessors, (26), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2023-02-15 21:43:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:43:33,964 INFO L93 Difference]: Finished difference Result 847 states and 2112 transitions. [2023-02-15 21:43:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 21:43:33,965 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 32 states have internal predecessors, (68), 15 states have call successors, (26), 6 states have call predecessors, (26), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) Word has length 108 [2023-02-15 21:43:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:43:33,973 INFO L225 Difference]: With dead ends: 847 [2023-02-15 21:43:33,974 INFO L226 Difference]: Without dead ends: 841 [2023-02-15 21:43:33,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 132 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=393, Invalid=4863, Unknown=0, NotChecked=0, Total=5256 [2023-02-15 21:43:33,976 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 111 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 21:43:33,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 292 Invalid, 1725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 21:43:33,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2023-02-15 21:43:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 672. [2023-02-15 21:43:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 492 states have (on average 1.201219512195122) internal successors, (591), 513 states have internal predecessors, (591), 73 states have call successors, (73), 38 states have call predecessors, (73), 106 states have return successors, (1100), 120 states have call predecessors, (1100), 43 states have call successors, (1100) [2023-02-15 21:43:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1764 transitions. [2023-02-15 21:43:34,157 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1764 transitions. Word has length 108 [2023-02-15 21:43:34,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:43:34,157 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 1764 transitions. [2023-02-15 21:43:34,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 32 states have internal predecessors, (68), 15 states have call successors, (26), 6 states have call predecessors, (26), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2023-02-15 21:43:34,158 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1764 transitions. [2023-02-15 21:43:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-15 21:43:34,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:43:34,166 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:43:34,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-15 21:43:34,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 21:43:34,375 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:43:34,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:43:34,375 INFO L85 PathProgramCache]: Analyzing trace with hash 181678716, now seen corresponding path program 3 times [2023-02-15 21:43:34,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:43:34,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591803118] [2023-02-15 21:43:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:43:34,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:43:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:35,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:35,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:35,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:35,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:35,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:43:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:35,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 21:43:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:35,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:35,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:35,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:43:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:35,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 21:43:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 21:43:35,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:43:35,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591803118] [2023-02-15 21:43:35,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591803118] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:43:35,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052065478] [2023-02-15 21:43:35,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:43:35,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:43:35,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:43:35,787 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 21:43:35,807 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 21:43:36,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 21:43:36,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:43:36,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 116 conjunts are in the unsatisfiable core [2023-02-15 21:43:36,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:43:36,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:43:36,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 21:43:36,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 21:43:36,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-15 21:43:36,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-15 21:43:36,256 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 21:43:36,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 21:43:36,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 21:43:36,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-15 21:43:36,381 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 21:43:36,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2023-02-15 21:43:36,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-02-15 21:43:37,221 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:43:37,226 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2023-02-15 21:43:37,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2023-02-15 21:43:37,237 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 21:43:37,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2023-02-15 21:43:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 21:43:37,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:43:38,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052065478] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:43:38,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:43:38,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 47 [2023-02-15 21:43:38,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765840000] [2023-02-15 21:43:38,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:43:38,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-15 21:43:38,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:43:38,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-15 21:43:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2908, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 21:43:38,044 INFO L87 Difference]: Start difference. First operand 672 states and 1764 transitions. Second operand has 47 states, 40 states have (on average 1.9) internal successors, (76), 33 states have internal predecessors, (76), 17 states have call successors, (21), 10 states have call predecessors, (21), 12 states have return successors, (18), 16 states have call predecessors, (18), 13 states have call successors, (18) [2023-02-15 21:43:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:43:41,707 INFO L93 Difference]: Finished difference Result 1940 states and 6754 transitions. [2023-02-15 21:43:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 21:43:41,708 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 40 states have (on average 1.9) internal successors, (76), 33 states have internal predecessors, (76), 17 states have call successors, (21), 10 states have call predecessors, (21), 12 states have return successors, (18), 16 states have call predecessors, (18), 13 states have call successors, (18) Word has length 76 [2023-02-15 21:43:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:43:41,740 INFO L225 Difference]: With dead ends: 1940 [2023-02-15 21:43:41,740 INFO L226 Difference]: Without dead ends: 1900 [2023-02-15 21:43:41,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 128 SyntacticMatches, 6 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3157 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=800, Invalid=10756, Unknown=0, NotChecked=0, Total=11556 [2023-02-15 21:43:41,744 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 379 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 301 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:43:41,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 369 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 2605 Invalid, 5 Unknown, 0 Unchecked, 1.6s Time] [2023-02-15 21:43:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2023-02-15 21:43:42,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 878. [2023-02-15 21:43:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 640 states have (on average 1.2109375) internal successors, (775), 665 states have internal predecessors, (775), 99 states have call successors, (99), 45 states have call predecessors, (99), 138 states have return successors, (1494), 167 states have call predecessors, (1494), 65 states have call successors, (1494) [2023-02-15 21:43:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2368 transitions. [2023-02-15 21:43:42,046 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2368 transitions. Word has length 76 [2023-02-15 21:43:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:43:42,046 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 2368 transitions. [2023-02-15 21:43:42,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 40 states have (on average 1.9) internal successors, (76), 33 states have internal predecessors, (76), 17 states have call successors, (21), 10 states have call predecessors, (21), 12 states have return successors, (18), 16 states have call predecessors, (18), 13 states have call successors, (18) [2023-02-15 21:43:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2368 transitions. [2023-02-15 21:43:42,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-15 21:43:42,061 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:43:42,062 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:43:42,069 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 21:43:42,268 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,SelfDestructingSolverStorable17 [2023-02-15 21:43:42,269 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:43:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:43:42,269 INFO L85 PathProgramCache]: Analyzing trace with hash 411711804, now seen corresponding path program 5 times [2023-02-15 21:43:42,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:43:42,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365128409] [2023-02-15 21:43:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:43:42,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:43:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-15 21:43:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:43:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:43:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:43:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-15 21:43:43,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:43:43,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365128409] [2023-02-15 21:43:43,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365128409] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:43:43,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107893200] [2023-02-15 21:43:43,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:43:43,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:43:43,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:43:43,985 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 21:43:43,991 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 21:43:44,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 21:43:44,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:43:44,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-15 21:43:44,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:43:44,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:43:44,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:43:45,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-02-15 21:43:45,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-15 21:43:45,394 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-02-15 21:43:45,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 26 [2023-02-15 21:43:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 27 proven. 62 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-02-15 21:43:45,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:43:48,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107893200] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:43:48,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:43:48,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 58 [2023-02-15 21:43:48,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949276810] [2023-02-15 21:43:48,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:43:48,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-15 21:43:48,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:43:48,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-15 21:43:48,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4890, Unknown=0, NotChecked=0, Total=5112 [2023-02-15 21:43:48,988 INFO L87 Difference]: Start difference. First operand 878 states and 2368 transitions. Second operand has 58 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 41 states have internal predecessors, (77), 17 states have call successors, (26), 6 states have call predecessors, (26), 9 states have return successors, (21), 18 states have call predecessors, (21), 13 states have call successors, (21) [2023-02-15 21:43:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:43:53,099 INFO L93 Difference]: Finished difference Result 1112 states and 3346 transitions. [2023-02-15 21:43:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-15 21:43:53,100 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 41 states have internal predecessors, (77), 17 states have call successors, (26), 6 states have call predecessors, (26), 9 states have return successors, (21), 18 states have call predecessors, (21), 13 states have call successors, (21) Word has length 95 [2023-02-15 21:43:53,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:43:53,110 INFO L225 Difference]: With dead ends: 1112 [2023-02-15 21:43:53,111 INFO L226 Difference]: Without dead ends: 1110 [2023-02-15 21:43:53,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1029, Invalid=13251, Unknown=0, NotChecked=0, Total=14280 [2023-02-15 21:43:53,113 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 123 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 3444 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 3502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:43:53,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 445 Invalid, 3502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3444 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 21:43:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2023-02-15 21:43:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 833. [2023-02-15 21:43:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 609 states have (on average 1.2151067323481117) internal successors, (740), 627 states have internal predecessors, (740), 97 states have call successors, (97), 44 states have call predecessors, (97), 126 states have return successors, (1356), 161 states have call predecessors, (1356), 65 states have call successors, (1356) [2023-02-15 21:43:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2193 transitions. [2023-02-15 21:43:53,319 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2193 transitions. Word has length 95 [2023-02-15 21:43:53,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:43:53,320 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 2193 transitions. [2023-02-15 21:43:53,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 41 states have internal predecessors, (77), 17 states have call successors, (26), 6 states have call predecessors, (26), 9 states have return successors, (21), 18 states have call predecessors, (21), 13 states have call successors, (21) [2023-02-15 21:43:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2193 transitions. [2023-02-15 21:43:53,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-15 21:43:53,329 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:43:53,329 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:43:53,337 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 21:43:53,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:43:53,538 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:43:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:43:53,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1800758555, now seen corresponding path program 2 times [2023-02-15 21:43:53,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:43:53,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759227548] [2023-02-15 21:43:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:43:53,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:43:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:54,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:54,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:54,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:56,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:57,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:43:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:57,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:43:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:57,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-15 21:43:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:57,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:57,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:57,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:43:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:57,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:43:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:57,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:57,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:43:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:57,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:43:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:57,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:43:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:43:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 24 proven. 101 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-02-15 21:43:57,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:43:57,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759227548] [2023-02-15 21:43:57,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759227548] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:43:57,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356328155] [2023-02-15 21:43:57,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:43:57,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:43:57,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:43:57,431 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 21:43:57,459 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 21:43:57,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:43:57,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:43:57,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-15 21:43:57,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:43:58,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-15 21:43:58,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-15 21:43:58,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-15 21:43:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 37 proven. 58 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-02-15 21:43:58,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:43:59,268 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-15 21:43:59,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2023-02-15 21:43:59,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356328155] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:43:59,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:43:59,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 44 [2023-02-15 21:43:59,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874629104] [2023-02-15 21:43:59,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:43:59,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 21:43:59,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:43:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 21:43:59,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 21:43:59,730 INFO L87 Difference]: Start difference. First operand 833 states and 2193 transitions. Second operand has 44 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 33 states have internal predecessors, (83), 17 states have call successors, (28), 5 states have call predecessors, (28), 12 states have return successors, (24), 17 states have call predecessors, (24), 14 states have call successors, (24) [2023-02-15 21:44:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:44:04,829 INFO L93 Difference]: Finished difference Result 1098 states and 2764 transitions. [2023-02-15 21:44:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-15 21:44:04,830 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 33 states have internal predecessors, (83), 17 states have call successors, (28), 5 states have call predecessors, (28), 12 states have return successors, (24), 17 states have call predecessors, (24), 14 states have call successors, (24) Word has length 109 [2023-02-15 21:44:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:44:04,840 INFO L225 Difference]: With dead ends: 1098 [2023-02-15 21:44:04,841 INFO L226 Difference]: Without dead ends: 958 [2023-02-15 21:44:04,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=619, Invalid=8123, Unknown=0, NotChecked=0, Total=8742 [2023-02-15 21:44:04,858 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 106 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 2590 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:44:04,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 333 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2590 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-15 21:44:04,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2023-02-15 21:44:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 641. [2023-02-15 21:44:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 476 states have (on average 1.2226890756302522) internal successors, (582), 468 states have internal predecessors, (582), 79 states have call successors, (79), 37 states have call predecessors, (79), 85 states have return successors, (737), 135 states have call predecessors, (737), 57 states have call successors, (737) [2023-02-15 21:44:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1398 transitions. [2023-02-15 21:44:05,000 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1398 transitions. Word has length 109 [2023-02-15 21:44:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:44:05,000 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 1398 transitions. [2023-02-15 21:44:05,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 33 states have internal predecessors, (83), 17 states have call successors, (28), 5 states have call predecessors, (28), 12 states have return successors, (24), 17 states have call predecessors, (24), 14 states have call successors, (24) [2023-02-15 21:44:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1398 transitions. [2023-02-15 21:44:05,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-02-15 21:44:05,007 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:44:05,008 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:44:05,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 21:44:05,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:44:05,219 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:44:05,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:44:05,220 INFO L85 PathProgramCache]: Analyzing trace with hash 63670812, now seen corresponding path program 6 times [2023-02-15 21:44:05,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:44:05,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509223203] [2023-02-15 21:44:05,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:44:05,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:44:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:44:06,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:44:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:44:06,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:44:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:44:06,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:44:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:44:26,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 21:44:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:44:26,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:44:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat