./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/array-tiling/pnr3.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 e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:09:45,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:09:45,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:09:45,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:09:45,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:09:45,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:09:45,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:09:45,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:09:45,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:09:45,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:09:45,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:09:45,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:09:45,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:09:45,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:09:45,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:09:45,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:09:45,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:09:45,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:09:45,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:09:45,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:09:45,452 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:09:45,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:09:45,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:09:45,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:09:45,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:09:45,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:09:45,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:09:45,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:09:45,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:09:45,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:09:45,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:09:45,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:09:45,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:09:45,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:09:45,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:09:45,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:09:45,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:09:45,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:09:45,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:09:45,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:09:45,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:09:45,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:09:45,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:09:45,481 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:09:45,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:09:45,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:09:45,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:09:45,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:09:45,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:09:45,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:09:45,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:09:45,486 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:09:45,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:09:45,487 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:09:45,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:09:45,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:09:45,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:09:45,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:09:45,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:09:45,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:09:45,488 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:09:45,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:09:45,489 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:09:45,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:09:45,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:09:45,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:09:45,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:09:45,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:09:45,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:09:45,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:09:45,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:09:45,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:09:45,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:09:45,491 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:09:45,491 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:09:45,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:09:45,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e [2022-07-20 21:09:45,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:09:45,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:09:45,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:09:45,746 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:09:45,746 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:09:45,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr3.c [2022-07-20 21:09:45,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9ffd4a65/060265016854411ebfe4bfa7b1442918/FLAGfde4fabdb [2022-07-20 21:09:46,114 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:09:46,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c [2022-07-20 21:09:46,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9ffd4a65/060265016854411ebfe4bfa7b1442918/FLAGfde4fabdb [2022-07-20 21:09:46,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9ffd4a65/060265016854411ebfe4bfa7b1442918 [2022-07-20 21:09:46,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:09:46,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:09:46,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:09:46,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:09:46,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:09:46,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:09:46" (1/1) ... [2022-07-20 21:09:46,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2436f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46, skipping insertion in model container [2022-07-20 21:09:46,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:09:46" (1/1) ... [2022-07-20 21:09:46,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:09:46,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:09:46,670 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2022-07-20 21:09:46,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:09:46,708 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:09:46,719 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2022-07-20 21:09:46,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:09:46,747 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:09:46,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46 WrapperNode [2022-07-20 21:09:46,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:09:46,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:09:46,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:09:46,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:09:46,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46" (1/1) ... [2022-07-20 21:09:46,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46" (1/1) ... [2022-07-20 21:09:46,785 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2022-07-20 21:09:46,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:09:46,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:09:46,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:09:46,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:09:46,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46" (1/1) ... [2022-07-20 21:09:46,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46" (1/1) ... [2022-07-20 21:09:46,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46" (1/1) ... [2022-07-20 21:09:46,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46" (1/1) ... [2022-07-20 21:09:46,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46" (1/1) ... [2022-07-20 21:09:46,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46" (1/1) ... [2022-07-20 21:09:46,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46" (1/1) ... [2022-07-20 21:09:46,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:09:46,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:09:46,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:09:46,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:09:46,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46" (1/1) ... [2022-07-20 21:09:46,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:09:46,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:46,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 21:09:46,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 21:09:46,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:09:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:09:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:09:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 21:09:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-20 21:09:46,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-20 21:09:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:09:46,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:09:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:09:46,964 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:09:46,965 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:09:47,130 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:09:47,134 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:09:47,147 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 21:09:47,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:09:47 BoogieIcfgContainer [2022-07-20 21:09:47,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:09:47,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:09:47,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:09:47,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:09:47,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:09:46" (1/3) ... [2022-07-20 21:09:47,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412c97b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:09:47, skipping insertion in model container [2022-07-20 21:09:47,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:46" (2/3) ... [2022-07-20 21:09:47,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412c97b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:09:47, skipping insertion in model container [2022-07-20 21:09:47,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:09:47" (3/3) ... [2022-07-20 21:09:47,155 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr3.c [2022-07-20 21:09:47,164 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:09:47,164 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:09:47,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:09:47,227 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@65f61bc7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@cbfff00 [2022-07-20 21:09:47,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:09:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:09:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 21:09:47,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:47,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:47,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1781049194, now seen corresponding path program 1 times [2022-07-20 21:09:47,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:47,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566663842] [2022-07-20 21:09:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:47,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:47,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566663842] [2022-07-20 21:09:47,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566663842] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:09:47,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:09:47,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:09:47,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208041567] [2022-07-20 21:09:47,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:09:47,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:09:47,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:47,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:09:47,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:09:47,418 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:09:47,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:47,435 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-07-20 21:09:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:09:47,437 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 21:09:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:47,441 INFO L225 Difference]: With dead ends: 57 [2022-07-20 21:09:47,441 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 21:09:47,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:09:47,449 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:47,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:09:47,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 21:09:47,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-20 21:09:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:09:47,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-20 21:09:47,480 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2022-07-20 21:09:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:47,481 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-20 21:09:47,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:09:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-20 21:09:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 21:09:47,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:47,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:47,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:09:47,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:47,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1807831303, now seen corresponding path program 1 times [2022-07-20 21:09:47,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:47,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535393852] [2022-07-20 21:09:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:47,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:47,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:47,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535393852] [2022-07-20 21:09:47,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535393852] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:09:47,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:09:47,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 21:09:47,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090492770] [2022-07-20 21:09:47,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:09:47,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 21:09:47,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:47,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 21:09:47,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:09:47,668 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:09:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:47,746 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-20 21:09:47,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 21:09:47,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 21:09:47,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:47,748 INFO L225 Difference]: With dead ends: 45 [2022-07-20 21:09:47,748 INFO L226 Difference]: Without dead ends: 38 [2022-07-20 21:09:47,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:09:47,749 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:47,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:09:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-20 21:09:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-07-20 21:09:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:09:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-20 21:09:47,756 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2022-07-20 21:09:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:47,756 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-20 21:09:47,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:09:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-20 21:09:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 21:09:47,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:47,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:47,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 21:09:47,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:47,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:47,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1367310263, now seen corresponding path program 1 times [2022-07-20 21:09:47,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:47,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548248350] [2022-07-20 21:09:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:47,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:47,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:47,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:47,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:09:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:47,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:47,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548248350] [2022-07-20 21:09:47,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548248350] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:47,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559273708] [2022-07-20 21:09:47,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:47,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:47,928 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:47,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:09:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 21:09:47,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:48,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-07-20 21:09:48,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:48,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 29 [2022-07-20 21:09:48,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:48,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 21 [2022-07-20 21:09:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:48,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:48,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 21:09:48,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-20 21:09:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:48,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559273708] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:48,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:48,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2022-07-20 21:09:48,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614234037] [2022-07-20 21:09:48,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:48,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 21:09:48,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:48,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 21:09:48,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:09:48,348 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 21:09:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:48,531 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2022-07-20 21:09:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:09:48,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2022-07-20 21:09:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:48,533 INFO L225 Difference]: With dead ends: 84 [2022-07-20 21:09:48,533 INFO L226 Difference]: Without dead ends: 82 [2022-07-20 21:09:48,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:09:48,534 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 79 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:48,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 181 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:09:48,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-20 21:09:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 42. [2022-07-20 21:09:48,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 21:09:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-07-20 21:09:48,542 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 31 [2022-07-20 21:09:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:48,543 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-07-20 21:09:48,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 21:09:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-07-20 21:09:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 21:09:48,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:48,544 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:48,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 21:09:48,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:48,759 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:48,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:48,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1238713291, now seen corresponding path program 1 times [2022-07-20 21:09:48,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:48,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830634475] [2022-07-20 21:09:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:48,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:48,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:48,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:48,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:09:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:48,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:48,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830634475] [2022-07-20 21:09:48,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830634475] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:48,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869921595] [2022-07-20 21:09:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:48,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:48,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:48,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:48,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:09:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 21:09:48,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:49,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:09:49,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:49,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 28 [2022-07-20 21:09:49,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:49,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 21:09:49,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:09:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:49,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:49,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 21:09:49,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-20 21:09:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:49,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869921595] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:49,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:49,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-20 21:09:49,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605200839] [2022-07-20 21:09:49,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:49,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 21:09:49,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:49,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 21:09:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:09:49,720 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 21:09:50,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:50,360 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2022-07-20 21:09:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 21:09:50,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 31 [2022-07-20 21:09:50,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:50,363 INFO L225 Difference]: With dead ends: 137 [2022-07-20 21:09:50,363 INFO L226 Difference]: Without dead ends: 135 [2022-07-20 21:09:50,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:09:50,365 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 194 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:50,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 409 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 385 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-07-20 21:09:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-20 21:09:50,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 63. [2022-07-20 21:09:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3125) internal successors, (63), 49 states have internal predecessors, (63), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 21:09:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2022-07-20 21:09:50,377 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 31 [2022-07-20 21:09:50,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:50,377 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2022-07-20 21:09:50,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 21:09:50,377 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2022-07-20 21:09:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 21:09:50,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:50,378 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:50,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:50,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-20 21:09:50,596 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:50,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2026411713, now seen corresponding path program 1 times [2022-07-20 21:09:50,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:50,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772343159] [2022-07-20 21:09:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:50,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:50,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:50,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:50,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:09:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:50,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:50,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772343159] [2022-07-20 21:09:50,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772343159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:50,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576452831] [2022-07-20 21:09:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:50,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:50,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:50,756 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:50,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:09:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:50,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 21:09:50,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:50,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-07-20 21:09:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:50,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 41 [2022-07-20 21:09:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:50,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:50,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:09:50,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:09:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:51,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576452831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:51,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:51,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-20 21:09:51,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952985073] [2022-07-20 21:09:51,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:51,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 21:09:51,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:51,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 21:09:51,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-20 21:09:51,012 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 21:09:51,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:51,315 INFO L93 Difference]: Finished difference Result 202 states and 292 transitions. [2022-07-20 21:09:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 21:09:51,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2022-07-20 21:09:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:51,318 INFO L225 Difference]: With dead ends: 202 [2022-07-20 21:09:51,318 INFO L226 Difference]: Without dead ends: 200 [2022-07-20 21:09:51,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:09:51,320 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 83 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:51,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 265 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:09:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-20 21:09:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 105. [2022-07-20 21:09:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.35) internal successors, (108), 82 states have internal predecessors, (108), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-20 21:09:51,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 152 transitions. [2022-07-20 21:09:51,355 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 152 transitions. Word has length 35 [2022-07-20 21:09:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:51,355 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 152 transitions. [2022-07-20 21:09:51,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 21:09:51,355 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 152 transitions. [2022-07-20 21:09:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 21:09:51,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:51,361 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:51,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:51,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:51,578 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:51,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:51,579 INFO L85 PathProgramCache]: Analyzing trace with hash 680207681, now seen corresponding path program 1 times [2022-07-20 21:09:51,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:51,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576227460] [2022-07-20 21:09:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:51,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:51,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:51,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:51,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:09:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:51,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:51,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576227460] [2022-07-20 21:09:51,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576227460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:51,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602439482] [2022-07-20 21:09:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:51,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:51,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:51,696 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:51,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:09:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:51,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 21:09:51,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:51,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:09:51,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:51,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 22 [2022-07-20 21:09:51,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:09:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:51,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:52,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:09:52,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:09:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:52,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602439482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:52,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:52,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2022-07-20 21:09:52,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222772247] [2022-07-20 21:09:52,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:52,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:09:52,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:52,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:09:52,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:09:52,090 INFO L87 Difference]: Start difference. First operand 105 states and 152 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 21:09:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:52,716 INFO L93 Difference]: Finished difference Result 318 states and 449 transitions. [2022-07-20 21:09:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 21:09:52,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 35 [2022-07-20 21:09:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:52,720 INFO L225 Difference]: With dead ends: 318 [2022-07-20 21:09:52,720 INFO L226 Difference]: Without dead ends: 316 [2022-07-20 21:09:52,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 21:09:52,721 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 175 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:52,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 450 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 482 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-07-20 21:09:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-20 21:09:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 148. [2022-07-20 21:09:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 110 states have (on average 1.3727272727272728) internal successors, (151), 113 states have internal predecessors, (151), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-20 21:09:52,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 217 transitions. [2022-07-20 21:09:52,737 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 217 transitions. Word has length 35 [2022-07-20 21:09:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:52,738 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 217 transitions. [2022-07-20 21:09:52,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 21:09:52,738 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 217 transitions. [2022-07-20 21:09:52,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 21:09:52,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:52,739 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:52,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:52,951 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 [2022-07-20 21:09:52,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash -406526155, now seen corresponding path program 2 times [2022-07-20 21:09:52,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:52,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547698768] [2022-07-20 21:09:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:52,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:09:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:53,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:53,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547698768] [2022-07-20 21:09:53,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547698768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:53,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615653008] [2022-07-20 21:09:53,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:09:53,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:53,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:53,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:53,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:09:53,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:09:53,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:53,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 21:09:53,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:53,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-07-20 21:09:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:53,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:53,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:09:53,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:09:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:53,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615653008] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:53,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:53,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-07-20 21:09:53,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463891032] [2022-07-20 21:09:53,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:53,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 21:09:53,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:53,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 21:09:53,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:09:53,216 INFO L87 Difference]: Start difference. First operand 148 states and 217 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:09:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:53,634 INFO L93 Difference]: Finished difference Result 629 states and 954 transitions. [2022-07-20 21:09:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 21:09:53,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-20 21:09:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:53,638 INFO L225 Difference]: With dead ends: 629 [2022-07-20 21:09:53,638 INFO L226 Difference]: Without dead ends: 627 [2022-07-20 21:09:53,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:09:53,639 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 65 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:53,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 314 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:09:53,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-07-20 21:09:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 337. [2022-07-20 21:09:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 252 states have (on average 1.4206349206349207) internal successors, (358), 252 states have internal predecessors, (358), 80 states have call successors, (80), 4 states have call predecessors, (80), 4 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-07-20 21:09:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 518 transitions. [2022-07-20 21:09:53,679 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 518 transitions. Word has length 39 [2022-07-20 21:09:53,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:53,679 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 518 transitions. [2022-07-20 21:09:53,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:09:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 518 transitions. [2022-07-20 21:09:53,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 21:09:53,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:53,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:53,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:53,897 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 [2022-07-20 21:09:53,897 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:53,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1686389833, now seen corresponding path program 1 times [2022-07-20 21:09:53,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:53,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410713709] [2022-07-20 21:09:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:53,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:09:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:53,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:53,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410713709] [2022-07-20 21:09:53,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410713709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:53,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744432873] [2022-07-20 21:09:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:53,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:53,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:54,007 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:54,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:09:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 21:09:54,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:54,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:09:54,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:09:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:54,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:54,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:09:54,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:09:54,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744432873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:54,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:09:54,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-07-20 21:09:54,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199832413] [2022-07-20 21:09:54,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:54,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:09:54,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:54,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:09:54,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:09:54,370 INFO L87 Difference]: Start difference. First operand 337 states and 518 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:09:55,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:55,191 INFO L93 Difference]: Finished difference Result 699 states and 1051 transitions. [2022-07-20 21:09:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 21:09:55,192 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-07-20 21:09:55,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:55,195 INFO L225 Difference]: With dead ends: 699 [2022-07-20 21:09:55,195 INFO L226 Difference]: Without dead ends: 697 [2022-07-20 21:09:55,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1913, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 21:09:55,196 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 171 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:55,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 327 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:09:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-07-20 21:09:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 160. [2022-07-20 21:09:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 125 states have internal predecessors, (165), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-20 21:09:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 231 transitions. [2022-07-20 21:09:55,220 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 231 transitions. Word has length 39 [2022-07-20 21:09:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:55,220 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 231 transitions. [2022-07-20 21:09:55,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:09:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 231 transitions. [2022-07-20 21:09:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 21:09:55,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:55,221 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:55,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:55,438 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 [2022-07-20 21:09:55,438 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:55,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:55,439 INFO L85 PathProgramCache]: Analyzing trace with hash 685144619, now seen corresponding path program 3 times [2022-07-20 21:09:55,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:55,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164388802] [2022-07-20 21:09:55,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:55,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:55,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:55,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:09:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:55,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:55,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164388802] [2022-07-20 21:09:55,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164388802] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:55,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54531559] [2022-07-20 21:09:55,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:09:55,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:55,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:55,640 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:55,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:09:55,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 21:09:55,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:55,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:09:55,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:55,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:55,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54531559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:55,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:55,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-07-20 21:09:55,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644861197] [2022-07-20 21:09:55,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:55,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 21:09:55,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:55,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 21:09:55,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2022-07-20 21:09:55,997 INFO L87 Difference]: Start difference. First operand 160 states and 231 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-20 21:09:56,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:56,239 INFO L93 Difference]: Finished difference Result 267 states and 383 transitions. [2022-07-20 21:09:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:09:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 43 [2022-07-20 21:09:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:56,240 INFO L225 Difference]: With dead ends: 267 [2022-07-20 21:09:56,240 INFO L226 Difference]: Without dead ends: 247 [2022-07-20 21:09:56,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:09:56,241 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 272 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:56,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 144 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:09:56,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-20 21:09:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 177. [2022-07-20 21:09:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 138 states have internal predecessors, (185), 34 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-20 21:09:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 253 transitions. [2022-07-20 21:09:56,261 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 253 transitions. Word has length 43 [2022-07-20 21:09:56,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:56,261 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 253 transitions. [2022-07-20 21:09:56,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-20 21:09:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 253 transitions. [2022-07-20 21:09:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 21:09:56,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:56,262 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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] [2022-07-20 21:09:56,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:56,479 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 [2022-07-20 21:09:56,480 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash 466828189, now seen corresponding path program 2 times [2022-07-20 21:09:56,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:56,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983076654] [2022-07-20 21:09:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:56,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:56,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:56,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:56,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:09:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:56,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:09:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:56,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:09:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:56,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:09:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:09:56,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:56,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983076654] [2022-07-20 21:09:56,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983076654] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:56,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538422226] [2022-07-20 21:09:56,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:09:56,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:56,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:56,620 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) [2022-07-20 21:09:56,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:09:56,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:09:56,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:56,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:09:56,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:56,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:09:56,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:56,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 28 [2022-07-20 21:09:56,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:56,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 28 [2022-07-20 21:09:56,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:56,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 23 [2022-07-20 21:09:56,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:56,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 23 [2022-07-20 21:09:56,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:56,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 23 [2022-07-20 21:09:57,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:09:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 21:09:57,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:57,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538422226] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:57,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:09:57,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-20 21:09:57,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973517639] [2022-07-20 21:09:57,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:57,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:09:57,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:09:57,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2022-07-20 21:09:57,846 INFO L87 Difference]: Start difference. First operand 177 states and 253 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-20 21:09:58,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:58,383 INFO L93 Difference]: Finished difference Result 242 states and 338 transitions. [2022-07-20 21:09:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:09:58,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 51 [2022-07-20 21:09:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:58,385 INFO L225 Difference]: With dead ends: 242 [2022-07-20 21:09:58,385 INFO L226 Difference]: Without dead ends: 240 [2022-07-20 21:09:58,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=237, Invalid=1168, Unknown=1, NotChecked=0, Total=1406 [2022-07-20 21:09:58,387 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 141 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:58,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 315 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 399 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-07-20 21:09:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-20 21:09:58,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 141. [2022-07-20 21:09:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 110 states have (on average 1.3) internal successors, (143), 110 states have internal predecessors, (143), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 21:09:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 193 transitions. [2022-07-20 21:09:58,408 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 193 transitions. Word has length 51 [2022-07-20 21:09:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:58,409 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 193 transitions. [2022-07-20 21:09:58,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-20 21:09:58,409 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 193 transitions. [2022-07-20 21:09:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 21:09:58,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:58,410 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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] [2022-07-20 21:09:58,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:58,626 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 [2022-07-20 21:09:58,627 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:58,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1257132653, now seen corresponding path program 2 times [2022-07-20 21:09:58,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:58,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249738119] [2022-07-20 21:09:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:58,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:58,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:58,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:58,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:09:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:58,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:09:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:58,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:09:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:58,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:09:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:09:58,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:58,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249738119] [2022-07-20 21:09:58,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249738119] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:58,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812224657] [2022-07-20 21:09:58,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:09:58,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:58,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:58,808 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) [2022-07-20 21:09:58,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:09:58,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:09:58,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:58,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:09:58,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:58,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:09:59,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:59,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 28 [2022-07-20 21:09:59,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:59,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 25 [2022-07-20 21:09:59,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:59,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 25 [2022-07-20 21:09:59,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:59,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 25 [2022-07-20 21:09:59,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:09:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-20 21:09:59,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:59,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812224657] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:59,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:09:59,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-20 21:09:59,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525144758] [2022-07-20 21:09:59,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:59,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 21:09:59,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 21:09:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=391, Unknown=1, NotChecked=0, Total=462 [2022-07-20 21:09:59,767 INFO L87 Difference]: Start difference. First operand 141 states and 193 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-20 21:10:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:00,342 INFO L93 Difference]: Finished difference Result 204 states and 277 transitions. [2022-07-20 21:10:00,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:10:00,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 55 [2022-07-20 21:10:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:00,344 INFO L225 Difference]: With dead ends: 204 [2022-07-20 21:10:00,344 INFO L226 Difference]: Without dead ends: 202 [2022-07-20 21:10:00,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=1435, Unknown=1, NotChecked=0, Total=1722 [2022-07-20 21:10:00,345 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 144 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:00,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 333 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 434 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-07-20 21:10:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-20 21:10:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 78. [2022-07-20 21:10:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 62 states have internal predecessors, (75), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 21:10:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2022-07-20 21:10:00,358 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 55 [2022-07-20 21:10:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:00,358 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2022-07-20 21:10:00,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-20 21:10:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2022-07-20 21:10:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 21:10:00,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:00,359 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:00,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:00,568 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 [2022-07-20 21:10:00,568 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:00,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1929317243, now seen corresponding path program 4 times [2022-07-20 21:10:00,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:00,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910519028] [2022-07-20 21:10:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:00,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:00,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:00,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:00,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:10:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:00,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:00,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:10:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:00,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:10:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:00,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:00,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910519028] [2022-07-20 21:10:00,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910519028] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:00,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981852973] [2022-07-20 21:10:00,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:10:00,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:00,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:00,725 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) [2022-07-20 21:10:00,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:10:00,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:10:00,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:00,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:10:00,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:00,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-07-20 21:10:00,836 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:00,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:10:00,851 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:10:00,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-20 21:10:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:00,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:01,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:01,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:10:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:01,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981852973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:01,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:01,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-07-20 21:10:01,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526531041] [2022-07-20 21:10:01,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:01,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:10:01,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:01,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:10:01,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:10:01,072 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-07-20 21:10:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:02,676 INFO L93 Difference]: Finished difference Result 688 states and 1044 transitions. [2022-07-20 21:10:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-20 21:10:02,676 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 63 [2022-07-20 21:10:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:02,679 INFO L225 Difference]: With dead ends: 688 [2022-07-20 21:10:02,679 INFO L226 Difference]: Without dead ends: 686 [2022-07-20 21:10:02,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=682, Invalid=3874, Unknown=0, NotChecked=0, Total=4556 [2022-07-20 21:10:02,680 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 273 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:02,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 866 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 21:10:02,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-07-20 21:10:02,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 133. [2022-07-20 21:10:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 103 states have internal predecessors, (134), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-20 21:10:02,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 186 transitions. [2022-07-20 21:10:02,715 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 186 transitions. Word has length 63 [2022-07-20 21:10:02,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:02,716 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 186 transitions. [2022-07-20 21:10:02,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-07-20 21:10:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 186 transitions. [2022-07-20 21:10:02,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 21:10:02,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:02,717 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 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] [2022-07-20 21:10:02,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:02,936 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 [2022-07-20 21:10:02,936 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:02,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1664050179, now seen corresponding path program 1 times [2022-07-20 21:10:02,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:02,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009128211] [2022-07-20 21:10:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:02,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:10:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:10:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:10:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:03,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:03,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009128211] [2022-07-20 21:10:03,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009128211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:03,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61842577] [2022-07-20 21:10:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:03,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:03,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:03,154 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) [2022-07-20 21:10:03,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:10:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:10:03,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:03,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:10:03,372 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:03,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:10:03,421 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:10:03,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:10:03,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:10:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-20 21:10:03,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:06,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:06,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:10:06,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61842577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:06,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:10:06,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2022-07-20 21:10:06,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310219758] [2022-07-20 21:10:06,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:06,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 21:10:06,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:06,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 21:10:06,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=623, Unknown=1, NotChecked=0, Total=702 [2022-07-20 21:10:06,231 INFO L87 Difference]: Start difference. First operand 133 states and 186 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-20 21:10:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:07,342 INFO L93 Difference]: Finished difference Result 327 states and 444 transitions. [2022-07-20 21:10:07,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-20 21:10:07,343 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 63 [2022-07-20 21:10:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:07,345 INFO L225 Difference]: With dead ends: 327 [2022-07-20 21:10:07,345 INFO L226 Difference]: Without dead ends: 325 [2022-07-20 21:10:07,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=459, Invalid=3446, Unknown=1, NotChecked=0, Total=3906 [2022-07-20 21:10:07,346 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 235 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:07,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 663 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 956 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2022-07-20 21:10:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-07-20 21:10:07,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 161. [2022-07-20 21:10:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 122 states have (on average 1.3278688524590163) internal successors, (162), 123 states have internal predecessors, (162), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-20 21:10:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 226 transitions. [2022-07-20 21:10:07,379 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 226 transitions. Word has length 63 [2022-07-20 21:10:07,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:07,380 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 226 transitions. [2022-07-20 21:10:07,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-20 21:10:07,380 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 226 transitions. [2022-07-20 21:10:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 21:10:07,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:07,381 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:07,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-20 21:10:07,595 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 [2022-07-20 21:10:07,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2043081871, now seen corresponding path program 5 times [2022-07-20 21:10:07,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:07,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941388188] [2022-07-20 21:10:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:07,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:10:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:10:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:10:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:07,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:07,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941388188] [2022-07-20 21:10:07,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941388188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:07,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022520547] [2022-07-20 21:10:07,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:10:07,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:07,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:07,702 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) [2022-07-20 21:10:07,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:10:07,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-20 21:10:07,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:07,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:10:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:07,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-07-20 21:10:07,875 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:07,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:10:07,982 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:10:07,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:10:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:08,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:08,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:08,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:10:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:08,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022520547] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:08,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:08,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2022-07-20 21:10:08,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7585211] [2022-07-20 21:10:08,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:08,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:10:08,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:08,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:10:08,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:10:08,075 INFO L87 Difference]: Start difference. First operand 161 states and 226 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-20 21:10:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:10,308 INFO L93 Difference]: Finished difference Result 1723 states and 2679 transitions. [2022-07-20 21:10:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-20 21:10:10,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 67 [2022-07-20 21:10:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:10,314 INFO L225 Difference]: With dead ends: 1723 [2022-07-20 21:10:10,314 INFO L226 Difference]: Without dead ends: 1721 [2022-07-20 21:10:10,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=721, Invalid=5441, Unknown=0, NotChecked=0, Total=6162 [2022-07-20 21:10:10,317 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 173 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:10,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1048 Invalid, 2915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 21:10:10,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-07-20 21:10:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 347. [2022-07-20 21:10:10,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 262 states have (on average 1.3854961832061068) internal successors, (363), 263 states have internal predecessors, (363), 78 states have call successors, (78), 6 states have call predecessors, (78), 6 states have return successors, (78), 77 states have call predecessors, (78), 78 states have call successors, (78) [2022-07-20 21:10:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 519 transitions. [2022-07-20 21:10:10,426 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 519 transitions. Word has length 67 [2022-07-20 21:10:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:10,427 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 519 transitions. [2022-07-20 21:10:10,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-20 21:10:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 519 transitions. [2022-07-20 21:10:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 21:10:10,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:10,428 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 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] [2022-07-20 21:10:10,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-20 21:10:10,649 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 [2022-07-20 21:10:10,650 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:10,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:10,650 INFO L85 PathProgramCache]: Analyzing trace with hash -656878477, now seen corresponding path program 1 times [2022-07-20 21:10:10,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:10,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288723417] [2022-07-20 21:10:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:10,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:10,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:10,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:10,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:10:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:10,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:10,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:10:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:10,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:10:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:10,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:10,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288723417] [2022-07-20 21:10:10,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288723417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:10,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273189615] [2022-07-20 21:10:10,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:10,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:10,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:10,795 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) [2022-07-20 21:10:10,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:10:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:10,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:10:10,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:10,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:10:11,032 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:10:11,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:10:11,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:10:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 21:10:11,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:11,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:11,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:10:11,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273189615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:11,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:10:11,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-20 21:10:11,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813379839] [2022-07-20 21:10:11,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:11,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:10:11,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:10:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-07-20 21:10:11,399 INFO L87 Difference]: Start difference. First operand 347 states and 519 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-20 21:10:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:13,320 INFO L93 Difference]: Finished difference Result 1529 states and 2319 transitions. [2022-07-20 21:10:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-20 21:10:13,321 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 67 [2022-07-20 21:10:13,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:13,326 INFO L225 Difference]: With dead ends: 1529 [2022-07-20 21:10:13,326 INFO L226 Difference]: Without dead ends: 1527 [2022-07-20 21:10:13,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=778, Invalid=6704, Unknown=0, NotChecked=0, Total=7482 [2022-07-20 21:10:13,328 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 397 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:13,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 931 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 1663 Invalid, 0 Unknown, 127 Unchecked, 0.7s Time] [2022-07-20 21:10:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2022-07-20 21:10:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 425. [2022-07-20 21:10:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 318 states have (on average 1.3930817610062893) internal successors, (443), 319 states have internal predecessors, (443), 96 states have call successors, (96), 10 states have call predecessors, (96), 10 states have return successors, (96), 95 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-20 21:10:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 635 transitions. [2022-07-20 21:10:13,451 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 635 transitions. Word has length 67 [2022-07-20 21:10:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:13,451 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 635 transitions. [2022-07-20 21:10:13,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-20 21:10:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 635 transitions. [2022-07-20 21:10:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-20 21:10:13,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:13,453 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:13,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:13,676 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 [2022-07-20 21:10:13,677 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1810243687, now seen corresponding path program 6 times [2022-07-20 21:10:13,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:13,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117101886] [2022-07-20 21:10:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:13,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:13,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:13,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:13,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:10:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:13,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:13,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:10:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:13,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:10:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:13,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:13,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117101886] [2022-07-20 21:10:13,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117101886] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:13,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606807004] [2022-07-20 21:10:13,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:10:13,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:13,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:13,806 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) [2022-07-20 21:10:13,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:10:13,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-20 21:10:13,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:13,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 21:10:13,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:13,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-07-20 21:10:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:14,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:14,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-20 21:10:14,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-20 21:10:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:14,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606807004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:14,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:14,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-07-20 21:10:14,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825191409] [2022-07-20 21:10:14,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:14,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:10:14,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:14,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:10:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:10:14,236 INFO L87 Difference]: Start difference. First operand 425 states and 635 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-20 21:10:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:21,269 INFO L93 Difference]: Finished difference Result 7738 states and 12276 transitions. [2022-07-20 21:10:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-07-20 21:10:21,269 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2022-07-20 21:10:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:21,296 INFO L225 Difference]: With dead ends: 7738 [2022-07-20 21:10:21,296 INFO L226 Difference]: Without dead ends: 7736 [2022-07-20 21:10:21,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12150 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2970, Invalid=26786, Unknown=0, NotChecked=0, Total=29756 [2022-07-20 21:10:21,304 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 484 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 5186 mSolverCounterSat, 1614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 7525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1614 IncrementalHoareTripleChecker+Valid, 5186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:21,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 2201 Invalid, 7525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1614 Valid, 5186 Invalid, 0 Unknown, 725 Unchecked, 2.6s Time] [2022-07-20 21:10:21,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7736 states. [2022-07-20 21:10:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7736 to 1019. [2022-07-20 21:10:21,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 758 states have (on average 1.4313984168865435) internal successors, (1085), 759 states have internal predecessors, (1085), 250 states have call successors, (250), 10 states have call predecessors, (250), 10 states have return successors, (250), 249 states have call predecessors, (250), 250 states have call successors, (250) [2022-07-20 21:10:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1585 transitions. [2022-07-20 21:10:21,711 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1585 transitions. Word has length 71 [2022-07-20 21:10:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:21,712 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1585 transitions. [2022-07-20 21:10:21,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-20 21:10:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1585 transitions. [2022-07-20 21:10:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-20 21:10:21,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:21,713 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 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] [2022-07-20 21:10:21,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:21,927 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 [2022-07-20 21:10:21,928 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:21,928 INFO L85 PathProgramCache]: Analyzing trace with hash -561495575, now seen corresponding path program 1 times [2022-07-20 21:10:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:21,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143286528] [2022-07-20 21:10:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:21,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:22,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:22,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:22,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:10:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:22,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:22,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:10:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:22,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:10:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:22,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:22,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143286528] [2022-07-20 21:10:22,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143286528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:22,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129525164] [2022-07-20 21:10:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:22,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:22,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:22,114 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) [2022-07-20 21:10:22,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:10:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:22,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:10:22,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:22,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:10:22,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:10:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:22,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:22,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:22,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:10:22,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129525164] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:22,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:10:22,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2022-07-20 21:10:22,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8541409] [2022-07-20 21:10:22,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:22,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 21:10:22,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:22,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 21:10:22,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:10:22,720 INFO L87 Difference]: Start difference. First operand 1019 states and 1585 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-20 21:10:25,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:25,242 INFO L93 Difference]: Finished difference Result 2343 states and 3582 transitions. [2022-07-20 21:10:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-20 21:10:25,242 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2022-07-20 21:10:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:25,249 INFO L225 Difference]: With dead ends: 2343 [2022-07-20 21:10:25,249 INFO L226 Difference]: Without dead ends: 2341 [2022-07-20 21:10:25,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3026 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1287, Invalid=8613, Unknown=0, NotChecked=0, Total=9900 [2022-07-20 21:10:25,251 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 291 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:25,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 986 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 21:10:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-07-20 21:10:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 461. [2022-07-20 21:10:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 354 states have (on average 1.3587570621468927) internal successors, (481), 355 states have internal predecessors, (481), 96 states have call successors, (96), 10 states have call predecessors, (96), 10 states have return successors, (96), 95 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-20 21:10:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 673 transitions. [2022-07-20 21:10:25,439 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 673 transitions. Word has length 71 [2022-07-20 21:10:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:25,439 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 673 transitions. [2022-07-20 21:10:25,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-20 21:10:25,440 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 673 transitions. [2022-07-20 21:10:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 21:10:25,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:25,441 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:25,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-20 21:10:25,655 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 [2022-07-20 21:10:25,655 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:25,656 INFO L85 PathProgramCache]: Analyzing trace with hash -629945763, now seen corresponding path program 7 times [2022-07-20 21:10:25,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:25,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862376951] [2022-07-20 21:10:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:25,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:25,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:25,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:25,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:10:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:25,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:25,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:10:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:25,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:10:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 34 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:25,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:25,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862376951] [2022-07-20 21:10:25,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862376951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:25,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653938866] [2022-07-20 21:10:25,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:10:25,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:25,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:25,956 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) [2022-07-20 21:10:25,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 21:10:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:26,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:10:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:26,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:26,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653938866] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:26,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:26,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2022-07-20 21:10:26,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594275062] [2022-07-20 21:10:26,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:26,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 21:10:26,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:26,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 21:10:26,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 21:10:26,697 INFO L87 Difference]: Start difference. First operand 461 states and 673 transitions. Second operand has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-20 21:10:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:27,244 INFO L93 Difference]: Finished difference Result 537 states and 775 transitions. [2022-07-20 21:10:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 21:10:27,244 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 75 [2022-07-20 21:10:27,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:27,272 INFO L225 Difference]: With dead ends: 537 [2022-07-20 21:10:27,273 INFO L226 Difference]: Without dead ends: 505 [2022-07-20 21:10:27,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1616, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 21:10:27,274 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 264 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:27,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 205 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:10:27,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-07-20 21:10:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 471. [2022-07-20 21:10:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 362 states have (on average 1.339779005524862) internal successors, (485), 363 states have internal predecessors, (485), 98 states have call successors, (98), 10 states have call predecessors, (98), 10 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2022-07-20 21:10:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 681 transitions. [2022-07-20 21:10:27,488 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 681 transitions. Word has length 75 [2022-07-20 21:10:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:27,488 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 681 transitions. [2022-07-20 21:10:27,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-20 21:10:27,489 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 681 transitions. [2022-07-20 21:10:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-20 21:10:27,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:27,490 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:27,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-20 21:10:27,696 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 [2022-07-20 21:10:27,696 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:27,697 INFO L85 PathProgramCache]: Analyzing trace with hash 159587245, now seen corresponding path program 8 times [2022-07-20 21:10:27,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:27,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205595040] [2022-07-20 21:10:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:27,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:27,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:27,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:27,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:10:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:27,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:10:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:27,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:10:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:27,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:10:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:27,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-20 21:10:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-20 21:10:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:10:27,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:27,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205595040] [2022-07-20 21:10:27,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205595040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:27,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555747116] [2022-07-20 21:10:27,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:10:27,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:27,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:27,860 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) [2022-07-20 21:10:27,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 21:10:27,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:10:27,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:27,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 21:10:27,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:27,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-07-20 21:10:27,993 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:27,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:10:28,010 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:28,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:10:28,167 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:10:28,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:10:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:10:28,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:28,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:28,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:10:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:10:28,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555747116] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:28,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:28,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2022-07-20 21:10:28,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425298845] [2022-07-20 21:10:28,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:28,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 21:10:28,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:28,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 21:10:28,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:10:28,335 INFO L87 Difference]: Start difference. First operand 471 states and 681 transitions. Second operand has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-20 21:10:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:41,767 INFO L93 Difference]: Finished difference Result 14381 states and 22875 transitions. [2022-07-20 21:10:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-07-20 21:10:41,768 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 95 [2022-07-20 21:10:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:41,806 INFO L225 Difference]: With dead ends: 14381 [2022-07-20 21:10:41,806 INFO L226 Difference]: Without dead ends: 14379 [2022-07-20 21:10:41,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 194 SyntacticMatches, 9 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34745 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5132, Invalid=72988, Unknown=0, NotChecked=0, Total=78120 [2022-07-20 21:10:41,813 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 450 mSDsluCounter, 2819 mSDsCounter, 0 mSdLazyCounter, 10299 mSolverCounterSat, 2203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 3547 SdHoareTripleChecker+Invalid, 12502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2203 IncrementalHoareTripleChecker+Valid, 10299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:41,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 3547 Invalid, 12502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2203 Valid, 10299 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-07-20 21:10:41,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14379 states. [2022-07-20 21:10:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14379 to 1115. [2022-07-20 21:10:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 842 states have (on average 1.4097387173396674) internal successors, (1187), 843 states have internal predecessors, (1187), 262 states have call successors, (262), 10 states have call predecessors, (262), 10 states have return successors, (262), 261 states have call predecessors, (262), 262 states have call successors, (262) [2022-07-20 21:10:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1711 transitions. [2022-07-20 21:10:42,472 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1711 transitions. Word has length 95 [2022-07-20 21:10:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:42,472 INFO L495 AbstractCegarLoop]: Abstraction has 1115 states and 1711 transitions. [2022-07-20 21:10:42,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-20 21:10:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1711 transitions. [2022-07-20 21:10:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-20 21:10:42,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:42,474 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:42,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:42,691 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 [2022-07-20 21:10:42,691 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:42,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:42,692 INFO L85 PathProgramCache]: Analyzing trace with hash -737806033, now seen corresponding path program 2 times [2022-07-20 21:10:42,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:42,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881317624] [2022-07-20 21:10:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:42,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:42,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:42,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:42,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:10:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:42,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:42,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:10:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:42,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:10:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:42,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:10:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:42,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-20 21:10:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:42,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-20 21:10:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:10:42,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881317624] [2022-07-20 21:10:42,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881317624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546377381] [2022-07-20 21:10:42,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:10:42,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:42,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:42,868 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) [2022-07-20 21:10:42,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 21:10:42,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:10:42,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:42,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 21:10:42,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:43,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:10:43,181 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:43,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:10:43,230 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:10:43,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:10:43,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:10:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 42 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 21:10:43,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:44,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:44,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:10:44,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546377381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:44,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:10:44,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-07-20 21:10:44,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958004030] [2022-07-20 21:10:44,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:44,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-20 21:10:44,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:44,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-20 21:10:44,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:10:44,141 INFO L87 Difference]: Start difference. First operand 1115 states and 1711 transitions. Second operand has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-20 21:10:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:57,495 INFO L93 Difference]: Finished difference Result 5383 states and 8417 transitions. [2022-07-20 21:10:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-20 21:10:57,495 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 95 [2022-07-20 21:10:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:57,505 INFO L225 Difference]: With dead ends: 5383 [2022-07-20 21:10:57,505 INFO L226 Difference]: Without dead ends: 5381 [2022-07-20 21:10:57,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4689 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1060, Invalid=11818, Unknown=4, NotChecked=0, Total=12882 [2022-07-20 21:10:57,508 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 475 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 4433 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 5460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 4433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:57,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 2263 Invalid, 5460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 4433 Invalid, 0 Unknown, 186 Unchecked, 1.9s Time] [2022-07-20 21:10:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2022-07-20 21:10:58,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 1253. [2022-07-20 21:10:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 942 states have (on average 1.4171974522292994) internal successors, (1335), 943 states have internal predecessors, (1335), 298 states have call successors, (298), 12 states have call predecessors, (298), 12 states have return successors, (298), 297 states have call predecessors, (298), 298 states have call successors, (298) [2022-07-20 21:10:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1931 transitions. [2022-07-20 21:10:58,108 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1931 transitions. Word has length 95 [2022-07-20 21:10:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:58,109 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 1931 transitions. [2022-07-20 21:10:58,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-20 21:10:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1931 transitions. [2022-07-20 21:10:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-20 21:10:58,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:58,111 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:58,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:58,327 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 [2022-07-20 21:10:58,328 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:58,328 INFO L85 PathProgramCache]: Analyzing trace with hash 519418531, now seen corresponding path program 9 times [2022-07-20 21:10:58,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:58,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048447744] [2022-07-20 21:10:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:58,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:58,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:58,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:58,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:10:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:58,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:58,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:10:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:58,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:10:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:58,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:10:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:58,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-20 21:10:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:58,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-20 21:10:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:10:58,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:58,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048447744] [2022-07-20 21:10:58,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048447744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:58,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482619584] [2022-07-20 21:10:58,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:10:58,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:58,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:58,478 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:58,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 21:10:58,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 21:10:58,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:58,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 21:10:58,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:58,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-07-20 21:10:58,827 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:58,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:10:59,025 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:10:59,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:10:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:10:59,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:59,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:59,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:10:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:10:59,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482619584] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:59,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:59,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-07-20 21:10:59,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988237312] [2022-07-20 21:10:59,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:59,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:10:59,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:10:59,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:10:59,186 INFO L87 Difference]: Start difference. First operand 1253 states and 1931 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 21:11:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:11:47,739 INFO L93 Difference]: Finished difference Result 56420 states and 90300 transitions. [2022-07-20 21:11:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 574 states. [2022-07-20 21:11:47,739 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 99 [2022-07-20 21:11:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:11:47,880 INFO L225 Difference]: With dead ends: 56420 [2022-07-20 21:11:47,880 INFO L226 Difference]: Without dead ends: 56418 [2022-07-20 21:11:47,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 201 SyntacticMatches, 8 SemanticMatches, 576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157170 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15652, Invalid=317854, Unknown=0, NotChecked=0, Total=333506 [2022-07-20 21:11:47,915 INFO L413 NwaCegarLoop]: 1458 mSDtfsCounter, 690 mSDsluCounter, 6800 mSDsCounter, 0 mSdLazyCounter, 22735 mSolverCounterSat, 5125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 8258 SdHoareTripleChecker+Invalid, 27860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5125 IncrementalHoareTripleChecker+Valid, 22735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:11:47,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 8258 Invalid, 27860 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5125 Valid, 22735 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-07-20 21:11:47,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2022-07-20 21:11:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 3183. [2022-07-20 21:11:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 2368 states have (on average 1.4484797297297298) internal successors, (3430), 2369 states have internal predecessors, (3430), 802 states have call successors, (802), 12 states have call predecessors, (802), 12 states have return successors, (802), 801 states have call predecessors, (802), 802 states have call successors, (802) [2022-07-20 21:11:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 5034 transitions. [2022-07-20 21:11:50,451 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 5034 transitions. Word has length 99 [2022-07-20 21:11:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:11:50,452 INFO L495 AbstractCegarLoop]: Abstraction has 3183 states and 5034 transitions. [2022-07-20 21:11:50,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 21:11:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 5034 transitions. [2022-07-20 21:11:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-20 21:11:50,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:11:50,456 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:11:50,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 21:11:50,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:50,673 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:11:50,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:11:50,674 INFO L85 PathProgramCache]: Analyzing trace with hash 943065253, now seen corresponding path program 2 times [2022-07-20 21:11:50,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:11:50,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287436718] [2022-07-20 21:11:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:11:50,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:11:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:50,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:11:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:50,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:11:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:50,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:11:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:50,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:11:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:50,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:11:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:50,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:11:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:50,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:11:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:50,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-20 21:11:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:50,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-20 21:11:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:11:50,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:11:50,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287436718] [2022-07-20 21:11:50,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287436718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:11:50,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656116222] [2022-07-20 21:11:50,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:11:50,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:11:50,866 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:11:50,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 21:11:50,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:11:50,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:11:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 21:11:50,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:11:51,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:11:51,214 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:11:51,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:11:51,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:11:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 24 proven. 134 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:11:51,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:11:53,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:11:53,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:11:53,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656116222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:11:53,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:11:53,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-07-20 21:11:53,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084069515] [2022-07-20 21:11:53,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:11:53,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:11:53,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:11:53,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:11:53,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1569, Unknown=1, NotChecked=0, Total=1722 [2022-07-20 21:11:53,940 INFO L87 Difference]: Start difference. First operand 3183 states and 5034 transitions. Second operand has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-20 21:12:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:12:16,740 INFO L93 Difference]: Finished difference Result 19001 states and 30290 transitions. [2022-07-20 21:12:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-07-20 21:12:16,741 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 99 [2022-07-20 21:12:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:12:16,786 INFO L225 Difference]: With dead ends: 19001 [2022-07-20 21:12:16,787 INFO L226 Difference]: Without dead ends: 18999 [2022-07-20 21:12:16,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1569, Invalid=20182, Unknown=5, NotChecked=0, Total=21756 [2022-07-20 21:12:16,795 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 842 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 7218 mSolverCounterSat, 1382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 2836 SdHoareTripleChecker+Invalid, 9031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1382 IncrementalHoareTripleChecker+Valid, 7218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:12:16,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 2836 Invalid, 9031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1382 Valid, 7218 Invalid, 0 Unknown, 431 Unchecked, 3.1s Time] [2022-07-20 21:12:16,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18999 states. [2022-07-20 21:12:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18999 to 3547. [2022-07-20 21:12:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 2632 states have (on average 1.452127659574468) internal successors, (3822), 2633 states have internal predecessors, (3822), 898 states have call successors, (898), 16 states have call predecessors, (898), 16 states have return successors, (898), 897 states have call predecessors, (898), 898 states have call successors, (898) [2022-07-20 21:12:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 5618 transitions. [2022-07-20 21:12:19,076 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 5618 transitions. Word has length 99 [2022-07-20 21:12:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:12:19,076 INFO L495 AbstractCegarLoop]: Abstraction has 3547 states and 5618 transitions. [2022-07-20 21:12:19,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-20 21:12:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 5618 transitions. [2022-07-20 21:12:19,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-20 21:12:19,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:12:19,081 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:12:19,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 21:12:19,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-20 21:12:19,298 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:12:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:12:19,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1220267295, now seen corresponding path program 3 times [2022-07-20 21:12:19,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:12:19,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908984554] [2022-07-20 21:12:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:12:19,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:12:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:12:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:12:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:12:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:12:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:12:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:12:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:12:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-20 21:12:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-20 21:12:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-20 21:12:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-20 21:12:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:12:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-20 21:12:19,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:12:19,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908984554] [2022-07-20 21:12:19,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908984554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:12:19,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684883004] [2022-07-20 21:12:19,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:12:19,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:12:19,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:12:19,606 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:12:19,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 21:12:19,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 21:12:19,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:12:19,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 21:12:19,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:12:19,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:12:19,994 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:12:19,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:12:20,046 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:12:20,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:12:20,122 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:12:20,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:12:20,188 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:12:20,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:12:20,245 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:12:20,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:12:20,310 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:12:20,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:12:20,447 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:12:20,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:12:20,498 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:12:20,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:12:20,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:12:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 106 proven. 78 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 21:12:20,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:12:21,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684883004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:12:21,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:12:21,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-20 21:12:21,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271972153] [2022-07-20 21:12:21,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:12:21,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:12:21,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:12:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:12:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=885, Unknown=1, NotChecked=0, Total=992 [2022-07-20 21:12:21,714 INFO L87 Difference]: Start difference. First operand 3547 states and 5618 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-07-20 21:12:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:12:24,878 INFO L93 Difference]: Finished difference Result 3783 states and 5859 transitions. [2022-07-20 21:12:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-20 21:12:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) Word has length 103 [2022-07-20 21:12:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:12:24,885 INFO L225 Difference]: With dead ends: 3783 [2022-07-20 21:12:24,885 INFO L226 Difference]: Without dead ends: 3781 [2022-07-20 21:12:24,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 136 SyntacticMatches, 19 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=456, Invalid=3325, Unknown=1, NotChecked=0, Total=3782 [2022-07-20 21:12:24,886 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 204 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:12:24,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 688 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1052 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-07-20 21:12:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2022-07-20 21:12:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 2020. [2022-07-20 21:12:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 1498 states have (on average 1.4425901201602136) internal successors, (2161), 1499 states have internal predecessors, (2161), 503 states have call successors, (503), 18 states have call predecessors, (503), 18 states have return successors, (503), 502 states have call predecessors, (503), 503 states have call successors, (503) [2022-07-20 21:12:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3167 transitions. [2022-07-20 21:12:26,572 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3167 transitions. Word has length 103 [2022-07-20 21:12:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:12:26,573 INFO L495 AbstractCegarLoop]: Abstraction has 2020 states and 3167 transitions. [2022-07-20 21:12:26,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-07-20 21:12:26,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3167 transitions. [2022-07-20 21:12:26,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-20 21:12:26,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:12:26,576 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:12:26,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 21:12:26,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-20 21:12:26,792 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:12:26,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:12:26,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2058870425, now seen corresponding path program 10 times [2022-07-20 21:12:26,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:12:26,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973913310] [2022-07-20 21:12:26,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:12:26,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:12:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:26,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:12:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:26,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:12:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:26,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:12:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:26,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:12:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:26,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:12:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:26,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:12:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:26,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:12:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:26,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-20 21:12:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:26,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-20 21:12:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:12:26,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:12:26,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973913310] [2022-07-20 21:12:26,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973913310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:12:26,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50392957] [2022-07-20 21:12:26,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:12:26,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:12:26,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:12:27,004 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:12:27,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 21:12:27,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:12:27,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:12:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 21:12:27,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:12:27,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-07-20 21:12:27,403 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:12:27,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:12:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:12:27,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:12:27,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:12:27,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:12:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:12:27,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50392957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:12:27,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:12:27,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2022-07-20 21:12:27,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202401748] [2022-07-20 21:12:27,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:12:27,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:12:27,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:12:27,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:12:27,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:12:27,573 INFO L87 Difference]: Start difference. First operand 2020 states and 3167 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)