./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mlceu2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/mlceu2.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 5f6dc88ffbc484195ca6ca04cd67e8542305d5e0e0d9b35d5440f9c4d427d3ec --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:08:31,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:08:31,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:08:31,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:08:31,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:08:31,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:08:31,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:08:31,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:08:31,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:08:31,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:08:31,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:08:31,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:08:31,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:08:31,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:08:31,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:08:31,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:08:31,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:08:31,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:08:31,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:08:31,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:08:31,273 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:08:31,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:08:31,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:08:31,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:08:31,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:08:31,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:08:31,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:08:31,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:08:31,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:08:31,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:08:31,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:08:31,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:08:31,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:08:31,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:08:31,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:08:31,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:08:31,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:08:31,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:08:31,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:08:31,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:08:31,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:08:31,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:08:31,306 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:08:31,332 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:08:31,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:08:31,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:08:31,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:08:31,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:08:31,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:08:31,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:08:31,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:08:31,335 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:08:31,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:08:31,336 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:08:31,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:08:31,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:08:31,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:08:31,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:08:31,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:08:31,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:08:31,338 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:08:31,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:08:31,339 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:08:31,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:08:31,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:08:31,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:08:31,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:08:31,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:08:31,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:08:31,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:08:31,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:08:31,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:08:31,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:08:31,341 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:08:31,341 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:08:31,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:08:31,342 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f6dc88ffbc484195ca6ca04cd67e8542305d5e0e0d9b35d5440f9c4d427d3ec [2022-07-13 10:08:31,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:08:31,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:08:31,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:08:31,547 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:08:31,548 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:08:31,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mlceu2.c [2022-07-13 10:08:31,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75311a44a/fdaf6c002f4646b5a28893ce55205290/FLAG2c485d04b [2022-07-13 10:08:31,920 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:08:31,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu2.c [2022-07-13 10:08:31,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75311a44a/fdaf6c002f4646b5a28893ce55205290/FLAG2c485d04b [2022-07-13 10:08:32,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75311a44a/fdaf6c002f4646b5a28893ce55205290 [2022-07-13 10:08:32,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:08:32,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:08:32,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:08:32,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:08:32,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:08:32,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:08:32" (1/1) ... [2022-07-13 10:08:32,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fd2f781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32, skipping insertion in model container [2022-07-13 10:08:32,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:08:32" (1/1) ... [2022-07-13 10:08:32,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:08:32,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:08:32,478 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/mlceu2.c[397,410] [2022-07-13 10:08:32,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:08:32,502 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:08:32,510 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/mlceu2.c[397,410] [2022-07-13 10:08:32,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:08:32,524 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:08:32,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32 WrapperNode [2022-07-13 10:08:32,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:08:32,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:08:32,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:08:32,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:08:32,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32" (1/1) ... [2022-07-13 10:08:32,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32" (1/1) ... [2022-07-13 10:08:32,550 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2022-07-13 10:08:32,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:08:32,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:08:32,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:08:32,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:08:32,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32" (1/1) ... [2022-07-13 10:08:32,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32" (1/1) ... [2022-07-13 10:08:32,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32" (1/1) ... [2022-07-13 10:08:32,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32" (1/1) ... [2022-07-13 10:08:32,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32" (1/1) ... [2022-07-13 10:08:32,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32" (1/1) ... [2022-07-13 10:08:32,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32" (1/1) ... [2022-07-13 10:08:32,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:08:32,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:08:32,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:08:32,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:08:32,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32" (1/1) ... [2022-07-13 10:08:32,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:08:32,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:32,600 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) [2022-07-13 10:08:32,625 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 [2022-07-13 10:08:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:08:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:08:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:08:32,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 10:08:32,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:08:32,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:08:32,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:08:32,704 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:08:32,705 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:08:32,862 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:08:32,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:08:32,869 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 10:08:32,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:08:32 BoogieIcfgContainer [2022-07-13 10:08:32,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:08:32,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:08:32,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:08:32,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:08:32,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:08:32" (1/3) ... [2022-07-13 10:08:32,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7765da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:08:32, skipping insertion in model container [2022-07-13 10:08:32,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:08:32" (2/3) ... [2022-07-13 10:08:32,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7765da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:08:32, skipping insertion in model container [2022-07-13 10:08:32,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:08:32" (3/3) ... [2022-07-13 10:08:32,881 INFO L111 eAbstractionObserver]: Analyzing ICFG mlceu2.c [2022-07-13 10:08:32,895 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:08:32,896 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:08:32,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:08:32,963 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@4e098a40, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@545acf20 [2022-07-13 10:08:32,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:08:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 10:08:32,984 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:32,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:32,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:32,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:32,992 INFO L85 PathProgramCache]: Analyzing trace with hash 131762974, now seen corresponding path program 1 times [2022-07-13 10:08:33,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:33,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011865089] [2022-07-13 10:08:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:33,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:33,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:33,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011865089] [2022-07-13 10:08:33,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011865089] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:08:33,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:08:33,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 10:08:33,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106415953] [2022-07-13 10:08:33,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:08:33,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 10:08:33,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:33,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 10:08:33,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:08:33,184 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:33,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:33,197 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-07-13 10:08:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 10:08:33,201 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-13 10:08:33,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:33,207 INFO L225 Difference]: With dead ends: 28 [2022-07-13 10:08:33,208 INFO L226 Difference]: Without dead ends: 13 [2022-07-13 10:08:33,215 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 [2022-07-13 10:08:33,219 INFO L413 NwaCegarLoop]: 20 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, 20 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 [2022-07-13 10:08:33,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:08:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-07-13 10:08:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-07-13 10:08:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-13 10:08:33,250 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2022-07-13 10:08:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:33,251 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-13 10:08:33,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-13 10:08:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 10:08:33,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:33,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:33,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 10:08:33,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:33,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash 121604243, now seen corresponding path program 1 times [2022-07-13 10:08:33,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:33,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479013128] [2022-07-13 10:08:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:33,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:33,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:33,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479013128] [2022-07-13 10:08:33,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479013128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:08:33,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:08:33,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 10:08:33,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570840753] [2022-07-13 10:08:33,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:08:33,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:08:33,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:33,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:08:33,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:08:33,388 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:33,427 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-07-13 10:08:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:08:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-13 10:08:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:33,429 INFO L225 Difference]: With dead ends: 26 [2022-07-13 10:08:33,429 INFO L226 Difference]: Without dead ends: 16 [2022-07-13 10:08:33,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:08:33,430 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:33,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:08:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-13 10:08:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-07-13 10:08:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-13 10:08:33,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2022-07-13 10:08:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:33,439 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-13 10:08:33,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-13 10:08:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 10:08:33,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:33,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:33,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 10:08:33,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash -150898456, now seen corresponding path program 1 times [2022-07-13 10:08:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:33,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531718460] [2022-07-13 10:08:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:33,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:33,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531718460] [2022-07-13 10:08:33,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531718460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:33,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778221916] [2022-07-13 10:08:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:33,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:33,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:33,549 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) [2022-07-13 10:08:33,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:08:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:33,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:08:33,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:33,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:33,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778221916] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:33,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:33,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-13 10:08:33,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072770832] [2022-07-13 10:08:33,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:33,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 10:08:33,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:33,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 10:08:33,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:08:33,765 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:33,817 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-07-13 10:08:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 10:08:33,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 10:08:33,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:33,819 INFO L225 Difference]: With dead ends: 29 [2022-07-13 10:08:33,819 INFO L226 Difference]: Without dead ends: 19 [2022-07-13 10:08:33,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:08:33,822 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:33,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:08:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-13 10:08:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-07-13 10:08:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:33,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-07-13 10:08:33,830 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2022-07-13 10:08:33,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:33,831 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-07-13 10:08:33,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:33,831 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-07-13 10:08:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 10:08:33,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:33,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:33,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:34,055 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 [2022-07-13 10:08:34,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:34,057 INFO L85 PathProgramCache]: Analyzing trace with hash -790614925, now seen corresponding path program 2 times [2022-07-13 10:08:34,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:34,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87911943] [2022-07-13 10:08:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:34,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:34,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:34,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87911943] [2022-07-13 10:08:34,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87911943] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:34,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441652383] [2022-07-13 10:08:34,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:08:34,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:34,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:34,259 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) [2022-07-13 10:08:34,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:08:34,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:08:34,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:34,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 10:08:34,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:34,359 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 15 treesize of output 11 [2022-07-13 10:08:34,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:08:34,437 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 [2022-07-13 10:08:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:34,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:36,577 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_22| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_22|)) (forall ((v_ArrVal_28 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_22| 4)) v_ArrVal_28) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) is different from false [2022-07-13 10:08:36,591 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 21 treesize of output 19 [2022-07-13 10:08:36,596 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 146 treesize of output 142 [2022-07-13 10:08:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-13 10:08:36,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441652383] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:36,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:36,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-07-13 10:08:36,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950147465] [2022-07-13 10:08:36,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:36,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 10:08:36,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 10:08:36,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=140, Unknown=1, NotChecked=24, Total=210 [2022-07-13 10:08:36,663 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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) [2022-07-13 10:08:38,679 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_22| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_22|)) (forall ((v_ArrVal_28 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_22| 4)) v_ArrVal_28) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) (= .cse0 0) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) 0))) is different from false [2022-07-13 10:08:38,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:38,779 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-07-13 10:08:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 10:08:38,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-13 10:08:38,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:38,780 INFO L225 Difference]: With dead ends: 26 [2022-07-13 10:08:38,781 INFO L226 Difference]: Without dead ends: 24 [2022-07-13 10:08:38,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=85, Invalid=227, Unknown=2, NotChecked=66, Total=380 [2022-07-13 10:08:38,782 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:38,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 60 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-07-13 10:08:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-13 10:08:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-07-13 10:08:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-07-13 10:08:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-07-13 10:08:38,787 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2022-07-13 10:08:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:38,787 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-07-13 10:08:38,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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) [2022-07-13 10:08:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-07-13 10:08:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 10:08:38,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:38,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:38,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:39,003 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 [2022-07-13 10:08:39,004 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash -601757591, now seen corresponding path program 1 times [2022-07-13 10:08:39,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:39,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240152613] [2022-07-13 10:08:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:39,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:39,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:39,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240152613] [2022-07-13 10:08:39,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240152613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:39,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757166924] [2022-07-13 10:08:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:39,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:39,110 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) [2022-07-13 10:08:39,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:08:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:39,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 10:08:39,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:39,183 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 15 treesize of output 11 [2022-07-13 10:08:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:39,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:39,283 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 16 treesize of output 14 [2022-07-13 10:08:39,286 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 24 [2022-07-13 10:08:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:39,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757166924] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:39,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:39,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-07-13 10:08:39,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439710089] [2022-07-13 10:08:39,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:39,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 10:08:39,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:39,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 10:08:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-13 10:08:39,314 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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) [2022-07-13 10:08:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:39,455 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-07-13 10:08:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 10:08:39,455 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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 18 [2022-07-13 10:08:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:39,456 INFO L225 Difference]: With dead ends: 31 [2022-07-13 10:08:39,456 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 10:08:39,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:08:39,457 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:39,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:08:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 10:08:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-07-13 10:08:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-07-13 10:08:39,461 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2022-07-13 10:08:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:39,461 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-07-13 10:08:39,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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) [2022-07-13 10:08:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-07-13 10:08:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 10:08:39,462 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:39,463 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:39,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:39,684 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 [2022-07-13 10:08:39,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:39,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1214727841, now seen corresponding path program 2 times [2022-07-13 10:08:39,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:39,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140565261] [2022-07-13 10:08:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:39,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:39,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:39,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140565261] [2022-07-13 10:08:39,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140565261] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:39,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899914362] [2022-07-13 10:08:39,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:08:39,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:39,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:39,760 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) [2022-07-13 10:08:39,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:08:39,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:08:39,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:39,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:08:39,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:39,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:39,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899914362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:39,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:39,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-13 10:08:39,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794942360] [2022-07-13 10:08:39,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:39,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 10:08:39,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:39,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 10:08:39,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:08:39,929 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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) [2022-07-13 10:08:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:40,010 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-07-13 10:08:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 10:08:40,012 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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 22 [2022-07-13 10:08:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:40,013 INFO L225 Difference]: With dead ends: 62 [2022-07-13 10:08:40,013 INFO L226 Difference]: Without dead ends: 36 [2022-07-13 10:08:40,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-13 10:08:40,016 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:40,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:08:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-13 10:08:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-07-13 10:08:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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) [2022-07-13 10:08:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-07-13 10:08:40,029 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2022-07-13 10:08:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:40,030 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-07-13 10:08:40,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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) [2022-07-13 10:08:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-07-13 10:08:40,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 10:08:40,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:40,030 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:40,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 10:08:40,231 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 [2022-07-13 10:08:40,231 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:40,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:40,232 INFO L85 PathProgramCache]: Analyzing trace with hash 185659636, now seen corresponding path program 3 times [2022-07-13 10:08:40,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:40,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284763562] [2022-07-13 10:08:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:40,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:40,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:40,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284763562] [2022-07-13 10:08:40,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284763562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:40,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212613063] [2022-07-13 10:08:40,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:08:40,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:40,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:40,388 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) [2022-07-13 10:08:40,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:08:40,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 10:08:40,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:40,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 10:08:40,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:40,479 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 15 treesize of output 11 [2022-07-13 10:08:40,743 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:08:40,743 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 44 treesize of output 23 [2022-07-13 10:08:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:40,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:41,054 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 [2022-07-13 10:08:41,061 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 28 [2022-07-13 10:08:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:41,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212613063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:41,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:41,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-07-13 10:08:41,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521982769] [2022-07-13 10:08:41,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:41,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 10:08:41,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:41,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 10:08:41,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-07-13 10:08:41,076 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 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) [2022-07-13 10:08:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:41,359 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-07-13 10:08:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 10:08:41,360 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-13 10:08:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:41,360 INFO L225 Difference]: With dead ends: 46 [2022-07-13 10:08:41,361 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 10:08:41,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 10:08:41,362 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:41,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 138 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2022-07-13 10:08:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 10:08:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-07-13 10:08:41,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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) [2022-07-13 10:08:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-07-13 10:08:41,368 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-07-13 10:08:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:41,368 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-07-13 10:08:41,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 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) [2022-07-13 10:08:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-07-13 10:08:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 10:08:41,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:41,369 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:41,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:41,592 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 [2022-07-13 10:08:41,592 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:41,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:41,592 INFO L85 PathProgramCache]: Analyzing trace with hash -903462723, now seen corresponding path program 1 times [2022-07-13 10:08:41,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:41,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821284069] [2022-07-13 10:08:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:41,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 10:08:41,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:41,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821284069] [2022-07-13 10:08:41,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821284069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:41,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628906318] [2022-07-13 10:08:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:41,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:41,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:41,642 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) [2022-07-13 10:08:41,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:08:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:41,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 10:08:41,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 10:08:41,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 10:08:41,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628906318] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:41,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:41,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-13 10:08:41,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210594650] [2022-07-13 10:08:41,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:41,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 10:08:41,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:41,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 10:08:41,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-07-13 10:08:41,795 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 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) [2022-07-13 10:08:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:41,881 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2022-07-13 10:08:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 10:08:41,881 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 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 28 [2022-07-13 10:08:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:41,883 INFO L225 Difference]: With dead ends: 101 [2022-07-13 10:08:41,883 INFO L226 Difference]: Without dead ends: 85 [2022-07-13 10:08:41,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-07-13 10:08:41,884 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 133 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:41,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 44 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:08:41,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-13 10:08:41,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 42. [2022-07-13 10:08:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 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) [2022-07-13 10:08:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-13 10:08:41,892 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2022-07-13 10:08:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:41,892 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-13 10:08:41,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 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) [2022-07-13 10:08:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-13 10:08:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 10:08:41,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:41,893 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:41,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:42,121 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 [2022-07-13 10:08:42,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:42,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:42,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2111640895, now seen corresponding path program 4 times [2022-07-13 10:08:42,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:42,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850328934] [2022-07-13 10:08:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:42,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:42,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:42,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850328934] [2022-07-13 10:08:42,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850328934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:42,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502005876] [2022-07-13 10:08:42,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:08:42,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:42,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:42,246 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) [2022-07-13 10:08:42,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:08:42,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:08:42,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:42,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 10:08:42,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:42,319 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 15 treesize of output 11 [2022-07-13 10:08:42,370 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:08:42,370 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 27 treesize of output 26 [2022-07-13 10:08:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:42,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:42,521 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 16 treesize of output 14 [2022-07-13 10:08:42,523 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 24 [2022-07-13 10:08:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:42,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502005876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:42,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:42,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 17 [2022-07-13 10:08:42,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195003918] [2022-07-13 10:08:42,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:42,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 10:08:42,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:42,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 10:08:42,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-13 10:08:42,545 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 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) [2022-07-13 10:08:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:42,792 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-07-13 10:08:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 10:08:42,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 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 28 [2022-07-13 10:08:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:42,793 INFO L225 Difference]: With dead ends: 78 [2022-07-13 10:08:42,793 INFO L226 Difference]: Without dead ends: 76 [2022-07-13 10:08:42,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-07-13 10:08:42,794 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:42,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 114 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 198 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-07-13 10:08:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-13 10:08:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 47. [2022-07-13 10:08:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-07-13 10:08:42,806 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 28 [2022-07-13 10:08:42,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:42,806 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-07-13 10:08:42,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 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) [2022-07-13 10:08:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-07-13 10:08:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 10:08:42,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:42,810 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:42,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:43,031 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 [2022-07-13 10:08:43,031 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:43,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:43,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1743746796, now seen corresponding path program 5 times [2022-07-13 10:08:43,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:43,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309794239] [2022-07-13 10:08:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:43,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:43,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:43,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309794239] [2022-07-13 10:08:43,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309794239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:43,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810383125] [2022-07-13 10:08:43,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:08:43,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:43,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:43,195 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) [2022-07-13 10:08:43,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:08:43,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-13 10:08:43,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:43,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 10:08:43,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:43,278 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 15 treesize of output 11 [2022-07-13 10:08:43,307 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:08:43,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:08:43,338 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:08:43,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:08:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:43,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:43,530 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 16 treesize of output 14 [2022-07-13 10:08:43,532 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 24 [2022-07-13 10:08:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:08:43,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810383125] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:43,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:43,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 18 [2022-07-13 10:08:43,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210118378] [2022-07-13 10:08:43,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:43,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 10:08:43,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:43,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 10:08:43,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:08:43,553 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:43,819 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-07-13 10:08:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 10:08:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-13 10:08:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:43,820 INFO L225 Difference]: With dead ends: 68 [2022-07-13 10:08:43,820 INFO L226 Difference]: Without dead ends: 66 [2022-07-13 10:08:43,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-07-13 10:08:43,821 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:43,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 119 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:08:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-13 10:08:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2022-07-13 10:08:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 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) [2022-07-13 10:08:43,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-07-13 10:08:43,828 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2022-07-13 10:08:43,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:43,829 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-07-13 10:08:43,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:43,829 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-07-13 10:08:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-13 10:08:43,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:43,829 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:43,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-13 10:08:44,030 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 [2022-07-13 10:08:44,030 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:44,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2074446645, now seen corresponding path program 6 times [2022-07-13 10:08:44,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:44,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862029098] [2022-07-13 10:08:44,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:44,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:44,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:44,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862029098] [2022-07-13 10:08:44,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862029098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:44,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334699432] [2022-07-13 10:08:44,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:08:44,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:44,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:44,241 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) [2022-07-13 10:08:44,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:08:44,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-13 10:08:44,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:44,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 10:08:44,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:44,336 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 15 treesize of output 11 [2022-07-13 10:08:44,604 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:08:44,605 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 44 treesize of output 23 [2022-07-13 10:08:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:44,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:44,973 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 [2022-07-13 10:08:44,976 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 28 [2022-07-13 10:08:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:44,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334699432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:44,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:44,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 31 [2022-07-13 10:08:44,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414913010] [2022-07-13 10:08:44,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:44,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 10:08:44,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:44,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 10:08:44,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2022-07-13 10:08:44,994 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 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) [2022-07-13 10:08:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:45,262 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-07-13 10:08:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 10:08:45,262 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 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 32 [2022-07-13 10:08:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:45,263 INFO L225 Difference]: With dead ends: 67 [2022-07-13 10:08:45,263 INFO L226 Difference]: Without dead ends: 47 [2022-07-13 10:08:45,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 10:08:45,264 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:45,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 130 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 104 Unchecked, 0.0s Time] [2022-07-13 10:08:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-13 10:08:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-13 10:08:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-07-13 10:08:45,271 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 32 [2022-07-13 10:08:45,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:45,271 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-07-13 10:08:45,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 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) [2022-07-13 10:08:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-07-13 10:08:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 10:08:45,272 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:45,272 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:45,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:45,487 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 [2022-07-13 10:08:45,487 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1532949366, now seen corresponding path program 7 times [2022-07-13 10:08:45,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:45,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856250381] [2022-07-13 10:08:45,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:45,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:45,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:45,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856250381] [2022-07-13 10:08:45,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856250381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:45,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935161728] [2022-07-13 10:08:45,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:08:45,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:45,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:45,700 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) [2022-07-13 10:08:45,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:08:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:45,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 10:08:45,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:45,800 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 15 treesize of output 11 [2022-07-13 10:08:45,844 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:08:45,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:08:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:45,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:48,094 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_120| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_120|)) (forall ((v_ArrVal_196 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_120| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_196) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)))) is different from false [2022-07-13 10:08:48,100 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 23 treesize of output 21 [2022-07-13 10:08:48,103 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 178 treesize of output 170 [2022-07-13 10:08:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-13 10:08:48,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935161728] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:48,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:48,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 31 [2022-07-13 10:08:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542367630] [2022-07-13 10:08:48,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:48,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 10:08:48,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:48,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 10:08:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=755, Unknown=1, NotChecked=56, Total=930 [2022-07-13 10:08:48,189 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 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) [2022-07-13 10:08:50,319 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= .cse0 12) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_120| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_120|)) (forall ((v_ArrVal_196 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_120| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_196) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)))))) is different from false [2022-07-13 10:08:50,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:50,581 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2022-07-13 10:08:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 10:08:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 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 35 [2022-07-13 10:08:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:50,582 INFO L225 Difference]: With dead ends: 78 [2022-07-13 10:08:50,582 INFO L226 Difference]: Without dead ends: 76 [2022-07-13 10:08:50,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=235, Invalid=1663, Unknown=2, NotChecked=170, Total=2070 [2022-07-13 10:08:50,584 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:50,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 186 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 333 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-07-13 10:08:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-13 10:08:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2022-07-13 10:08:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 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) [2022-07-13 10:08:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-07-13 10:08:50,592 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 35 [2022-07-13 10:08:50,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:50,592 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-07-13 10:08:50,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 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) [2022-07-13 10:08:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-07-13 10:08:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 10:08:50,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:50,593 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:50,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:50,816 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 [2022-07-13 10:08:50,817 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:50,817 INFO L85 PathProgramCache]: Analyzing trace with hash 632743168, now seen corresponding path program 8 times [2022-07-13 10:08:50,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:50,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100120919] [2022-07-13 10:08:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:50,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:51,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:51,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100120919] [2022-07-13 10:08:51,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100120919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:51,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654193159] [2022-07-13 10:08:51,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:08:51,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:51,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:51,011 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) [2022-07-13 10:08:51,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:08:51,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:08:51,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:51,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 10:08:51,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:51,119 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 15 treesize of output 11 [2022-07-13 10:08:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:51,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:51,307 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 16 treesize of output 14 [2022-07-13 10:08:51,309 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 24 [2022-07-13 10:08:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:51,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654193159] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:51,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:51,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 20 [2022-07-13 10:08:51,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014572152] [2022-07-13 10:08:51,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:51,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:08:51,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:51,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:08:51,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:08:51,353 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 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) [2022-07-13 10:08:51,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:51,667 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-07-13 10:08:51,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 10:08:51,668 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-13 10:08:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:51,669 INFO L225 Difference]: With dead ends: 80 [2022-07-13 10:08:51,669 INFO L226 Difference]: Without dead ends: 78 [2022-07-13 10:08:51,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 10:08:51,670 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:51,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 164 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:08:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-13 10:08:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-07-13 10:08:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 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) [2022-07-13 10:08:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-07-13 10:08:51,683 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 39 [2022-07-13 10:08:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:51,684 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-07-13 10:08:51,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 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) [2022-07-13 10:08:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-07-13 10:08:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 10:08:51,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:51,685 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:51,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:51,891 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 [2022-07-13 10:08:51,891 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:51,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:51,891 INFO L85 PathProgramCache]: Analyzing trace with hash -23096714, now seen corresponding path program 9 times [2022-07-13 10:08:51,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:51,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988942297] [2022-07-13 10:08:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:51,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:52,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:52,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988942297] [2022-07-13 10:08:52,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988942297] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:52,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667652362] [2022-07-13 10:08:52,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:08:52,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:52,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:52,022 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) [2022-07-13 10:08:52,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:08:52,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-13 10:08:52,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:52,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 10:08:52,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:52,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:52,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667652362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:52,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:52,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-13 10:08:52,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816191207] [2022-07-13 10:08:52,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:52,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 10:08:52,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:52,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 10:08:52,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-13 10:08:52,294 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 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) [2022-07-13 10:08:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:52,444 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-07-13 10:08:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 10:08:52,445 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 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 43 [2022-07-13 10:08:52,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:52,446 INFO L225 Difference]: With dead ends: 110 [2022-07-13 10:08:52,446 INFO L226 Difference]: Without dead ends: 82 [2022-07-13 10:08:52,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-13 10:08:52,447 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:52,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 115 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:08:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-13 10:08:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2022-07-13 10:08:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-07-13 10:08:52,467 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 43 [2022-07-13 10:08:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:52,467 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-07-13 10:08:52,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 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) [2022-07-13 10:08:52,468 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-07-13 10:08:52,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 10:08:52,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:52,470 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:52,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:52,692 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 [2022-07-13 10:08:52,692 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:52,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:52,693 INFO L85 PathProgramCache]: Analyzing trace with hash 219503105, now seen corresponding path program 10 times [2022-07-13 10:08:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:52,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38405692] [2022-07-13 10:08:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:52,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:52,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:52,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38405692] [2022-07-13 10:08:52,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38405692] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:52,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187539694] [2022-07-13 10:08:52,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:08:52,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:52,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:52,866 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) [2022-07-13 10:08:52,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 10:08:52,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:08:52,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:52,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 10:08:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:52,971 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 15 treesize of output 11 [2022-07-13 10:08:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:53,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:53,185 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 16 treesize of output 14 [2022-07-13 10:08:53,186 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 24 [2022-07-13 10:08:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:53,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187539694] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:53,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:53,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 23 [2022-07-13 10:08:53,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361141344] [2022-07-13 10:08:53,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:53,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 10:08:53,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:53,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 10:08:53,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-13 10:08:53,222 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 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) [2022-07-13 10:08:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:53,618 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-07-13 10:08:53,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 10:08:53,618 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 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 46 [2022-07-13 10:08:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:53,618 INFO L225 Difference]: With dead ends: 84 [2022-07-13 10:08:53,619 INFO L226 Difference]: Without dead ends: 82 [2022-07-13 10:08:53,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 10:08:53,620 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:53,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 182 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:08:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-13 10:08:53,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-07-13 10:08:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2022-07-13 10:08:53,630 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 46 [2022-07-13 10:08:53,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:53,630 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2022-07-13 10:08:53,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 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) [2022-07-13 10:08:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2022-07-13 10:08:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 10:08:53,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:53,631 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:53,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:53,843 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 [2022-07-13 10:08:53,843 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1437626040, now seen corresponding path program 2 times [2022-07-13 10:08:53,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:53,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298288828] [2022-07-13 10:08:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:53,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:08:53,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:53,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298288828] [2022-07-13 10:08:53,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298288828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:53,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931854357] [2022-07-13 10:08:53,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:08:53,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:53,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:53,913 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) [2022-07-13 10:08:53,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 10:08:53,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:08:53,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:53,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 10:08:53,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:08:54,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:08:54,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931854357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:54,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:54,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-13 10:08:54,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830583257] [2022-07-13 10:08:54,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:54,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 10:08:54,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:54,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 10:08:54,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-07-13 10:08:54,189 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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) [2022-07-13 10:08:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:54,365 INFO L93 Difference]: Finished difference Result 227 states and 256 transitions. [2022-07-13 10:08:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 10:08:54,365 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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 47 [2022-07-13 10:08:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:54,366 INFO L225 Difference]: With dead ends: 227 [2022-07-13 10:08:54,366 INFO L226 Difference]: Without dead ends: 195 [2022-07-13 10:08:54,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-07-13 10:08:54,367 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 263 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:54,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 91 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:08:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-13 10:08:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 106. [2022-07-13 10:08:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 105 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:54,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2022-07-13 10:08:54,380 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 47 [2022-07-13 10:08:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:54,380 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2022-07-13 10:08:54,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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) [2022-07-13 10:08:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2022-07-13 10:08:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 10:08:54,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:54,381 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:54,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:54,581 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 [2022-07-13 10:08:54,582 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:54,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:54,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2009702135, now seen corresponding path program 11 times [2022-07-13 10:08:54,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:54,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960705375] [2022-07-13 10:08:54,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:54,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:54,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:54,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960705375] [2022-07-13 10:08:54,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960705375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:54,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063231343] [2022-07-13 10:08:54,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:08:54,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:54,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:54,722 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) [2022-07-13 10:08:54,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 10:08:54,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-13 10:08:54,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:54,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 10:08:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:54,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:55,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063231343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:55,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:55,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-13 10:08:55,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098810773] [2022-07-13 10:08:55,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:55,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 10:08:55,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:55,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 10:08:55,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-13 10:08:55,020 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 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) [2022-07-13 10:08:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:55,195 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2022-07-13 10:08:55,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 10:08:55,196 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 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 50 [2022-07-13 10:08:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:55,196 INFO L225 Difference]: With dead ends: 148 [2022-07-13 10:08:55,197 INFO L226 Difference]: Without dead ends: 116 [2022-07-13 10:08:55,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 10:08:55,198 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 125 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:55,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 128 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:08:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-13 10:08:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 106. [2022-07-13 10:08:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.161904761904762) internal successors, (122), 105 states have internal predecessors, (122), 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) [2022-07-13 10:08:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2022-07-13 10:08:55,209 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 50 [2022-07-13 10:08:55,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:55,210 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2022-07-13 10:08:55,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 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) [2022-07-13 10:08:55,210 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2022-07-13 10:08:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 10:08:55,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:55,211 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:55,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:55,424 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 [2022-07-13 10:08:55,424 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1663478516, now seen corresponding path program 12 times [2022-07-13 10:08:55,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:55,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425918639] [2022-07-13 10:08:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:55,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:55,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:55,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425918639] [2022-07-13 10:08:55,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425918639] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:55,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575907518] [2022-07-13 10:08:55,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:08:55,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:55,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:55,644 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) [2022-07-13 10:08:55,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 10:08:55,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-13 10:08:55,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:55,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 10:08:55,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:55,858 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 15 treesize of output 11 [2022-07-13 10:08:56,374 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:08:56,374 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 44 treesize of output 23 [2022-07-13 10:08:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:56,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:56,959 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 [2022-07-13 10:08:56,961 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 28 [2022-07-13 10:08:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:56,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575907518] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:56,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:56,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 47 [2022-07-13 10:08:56,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695939129] [2022-07-13 10:08:56,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:56,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-13 10:08:56,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-13 10:08:56,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2022-07-13 10:08:56,986 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 47 states have internal predecessors, (132), 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) [2022-07-13 10:08:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:57,586 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2022-07-13 10:08:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-13 10:08:57,587 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 47 states have internal predecessors, (132), 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 53 [2022-07-13 10:08:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:57,587 INFO L225 Difference]: With dead ends: 139 [2022-07-13 10:08:57,588 INFO L226 Difference]: Without dead ends: 107 [2022-07-13 10:08:57,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=554, Invalid=4138, Unknown=0, NotChecked=0, Total=4692 [2022-07-13 10:08:57,589 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:57,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 277 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 270 Invalid, 0 Unknown, 197 Unchecked, 0.1s Time] [2022-07-13 10:08:57,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-13 10:08:57,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-07-13 10:08:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 105 states have internal predecessors, (121), 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) [2022-07-13 10:08:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2022-07-13 10:08:57,601 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 53 [2022-07-13 10:08:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:57,601 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2022-07-13 10:08:57,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 47 states have internal predecessors, (132), 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) [2022-07-13 10:08:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2022-07-13 10:08:57,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 10:08:57,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:57,602 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:57,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 10:08:57,802 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 [2022-07-13 10:08:57,803 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:57,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:57,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2083482327, now seen corresponding path program 13 times [2022-07-13 10:08:57,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:57,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393989146] [2022-07-13 10:08:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:57,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:58,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:58,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393989146] [2022-07-13 10:08:58,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393989146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:58,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826235283] [2022-07-13 10:08:58,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:08:58,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:58,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:58,024 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) [2022-07-13 10:08:58,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 10:08:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:58,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 10:08:58,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:58,127 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 15 treesize of output 11 [2022-07-13 10:08:58,181 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:08:58,181 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 27 treesize of output 26 [2022-07-13 10:08:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:58,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:08:58,531 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 16 treesize of output 14 [2022-07-13 10:08:58,533 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 24 [2022-07-13 10:08:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:58,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826235283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:08:58,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:08:58,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 29 [2022-07-13 10:08:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765584103] [2022-07-13 10:08:58,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:08:58,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 10:08:58,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:08:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 10:08:58,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-13 10:08:58,591 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 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) [2022-07-13 10:08:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:08:59,324 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2022-07-13 10:08:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 10:08:59,324 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 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 56 [2022-07-13 10:08:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:08:59,326 INFO L225 Difference]: With dead ends: 155 [2022-07-13 10:08:59,326 INFO L226 Difference]: Without dead ends: 153 [2022-07-13 10:08:59,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 10:08:59,328 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 80 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:08:59,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 477 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 964 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2022-07-13 10:08:59,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-13 10:08:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 111. [2022-07-13 10:08:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1454545454545455) internal successors, (126), 110 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:08:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2022-07-13 10:08:59,341 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 56 [2022-07-13 10:08:59,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:08:59,341 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2022-07-13 10:08:59,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 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) [2022-07-13 10:08:59,341 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2022-07-13 10:08:59,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 10:08:59,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:08:59,342 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:08:59,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-13 10:08:59,542 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 [2022-07-13 10:08:59,542 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:08:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:08:59,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1593933100, now seen corresponding path program 14 times [2022-07-13 10:08:59,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:08:59,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604963135] [2022-07-13 10:08:59,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:08:59,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:08:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:08:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:08:59,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:08:59,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604963135] [2022-07-13 10:08:59,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604963135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:08:59,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480628224] [2022-07-13 10:08:59,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:08:59,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:08:59,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:08:59,819 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) [2022-07-13 10:08:59,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 10:08:59,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:08:59,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:08:59,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-13 10:08:59,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:08:59,917 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 15 treesize of output 11 [2022-07-13 10:08:59,949 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:08:59,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:08:59,988 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:08:59,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:09:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:00,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:00,350 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 16 treesize of output 14 [2022-07-13 10:09:00,352 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 24 [2022-07-13 10:09:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:09:00,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480628224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:00,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:00,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 30 [2022-07-13 10:09:00,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102531049] [2022-07-13 10:09:00,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:00,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 10:09:00,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:00,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 10:09:00,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-07-13 10:09:00,402 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 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) [2022-07-13 10:09:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:01,043 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2022-07-13 10:09:01,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 10:09:01,043 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 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 59 [2022-07-13 10:09:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:01,044 INFO L225 Difference]: With dead ends: 150 [2022-07-13 10:09:01,044 INFO L226 Difference]: Without dead ends: 148 [2022-07-13 10:09:01,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 101 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 10:09:01,045 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 56 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:01,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 461 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 10:09:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-13 10:09:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2022-07-13 10:09:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.146788990825688) internal successors, (125), 109 states have internal predecessors, (125), 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) [2022-07-13 10:09:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2022-07-13 10:09:01,057 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 59 [2022-07-13 10:09:01,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:01,057 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2022-07-13 10:09:01,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 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) [2022-07-13 10:09:01,058 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2022-07-13 10:09:01,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 10:09:01,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:01,058 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:01,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-13 10:09:01,258 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 [2022-07-13 10:09:01,259 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:01,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:01,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1222421299, now seen corresponding path program 15 times [2022-07-13 10:09:01,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:01,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733084323] [2022-07-13 10:09:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:01,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:01,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:01,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733084323] [2022-07-13 10:09:01,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733084323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:01,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432888908] [2022-07-13 10:09:01,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:09:01,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:01,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:01,487 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) [2022-07-13 10:09:01,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 10:09:01,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-13 10:09:01,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:01,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 10:09:01,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:01,754 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 15 treesize of output 11 [2022-07-13 10:09:02,323 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:09:02,323 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 44 treesize of output 23 [2022-07-13 10:09:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:02,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:02,948 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 [2022-07-13 10:09:02,950 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 28 [2022-07-13 10:09:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:02,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432888908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:02,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:02,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2022-07-13 10:09:02,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718894194] [2022-07-13 10:09:02,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:02,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-13 10:09:02,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:02,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-13 10:09:02,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2323, Unknown=0, NotChecked=0, Total=2652 [2022-07-13 10:09:02,978 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 52 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 52 states have internal predecessors, (150), 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) [2022-07-13 10:09:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:03,818 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2022-07-13 10:09:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 10:09:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 52 states have internal predecessors, (150), 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 60 [2022-07-13 10:09:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:03,819 INFO L225 Difference]: With dead ends: 146 [2022-07-13 10:09:03,819 INFO L226 Difference]: Without dead ends: 110 [2022-07-13 10:09:03,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=781, Invalid=6191, Unknown=0, NotChecked=0, Total=6972 [2022-07-13 10:09:03,821 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:03,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 344 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 267 Invalid, 0 Unknown, 196 Unchecked, 0.1s Time] [2022-07-13 10:09:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-13 10:09:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-07-13 10:09:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 109 states have internal predecessors, (124), 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) [2022-07-13 10:09:03,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2022-07-13 10:09:03,833 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 60 [2022-07-13 10:09:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:03,833 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2022-07-13 10:09:03,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 52 states have internal predecessors, (150), 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) [2022-07-13 10:09:03,834 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2022-07-13 10:09:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 10:09:03,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:03,834 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:03,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-13 10:09:04,034 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 [2022-07-13 10:09:04,035 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:04,035 INFO L85 PathProgramCache]: Analyzing trace with hash -481676126, now seen corresponding path program 16 times [2022-07-13 10:09:04,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:04,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140931497] [2022-07-13 10:09:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:04,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:04,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:04,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140931497] [2022-07-13 10:09:04,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140931497] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:04,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672000459] [2022-07-13 10:09:04,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:09:04,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:04,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:04,331 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) [2022-07-13 10:09:04,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 10:09:04,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:09:04,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:04,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 10:09:04,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:04,446 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 15 treesize of output 11 [2022-07-13 10:09:04,498 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:09:04,498 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 27 treesize of output 26 [2022-07-13 10:09:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:04,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:04,872 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 16 treesize of output 14 [2022-07-13 10:09:04,874 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 24 [2022-07-13 10:09:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:04,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672000459] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:04,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:04,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 22] total 32 [2022-07-13 10:09:04,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092631502] [2022-07-13 10:09:04,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:04,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-13 10:09:04,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-13 10:09:04,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-07-13 10:09:04,928 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 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) [2022-07-13 10:09:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:05,642 INFO L93 Difference]: Finished difference Result 163 states and 176 transitions. [2022-07-13 10:09:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-13 10:09:05,642 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 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 63 [2022-07-13 10:09:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:05,643 INFO L225 Difference]: With dead ends: 163 [2022-07-13 10:09:05,643 INFO L226 Difference]: Without dead ends: 161 [2022-07-13 10:09:05,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 109 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=267, Invalid=3155, Unknown=0, NotChecked=0, Total=3422 [2022-07-13 10:09:05,645 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 108 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:05,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 490 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 909 Invalid, 0 Unknown, 19 Unchecked, 0.4s Time] [2022-07-13 10:09:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-13 10:09:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 115. [2022-07-13 10:09:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.131578947368421) internal successors, (129), 114 states have internal predecessors, (129), 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) [2022-07-13 10:09:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2022-07-13 10:09:05,660 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 63 [2022-07-13 10:09:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:05,660 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2022-07-13 10:09:05,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 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) [2022-07-13 10:09:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2022-07-13 10:09:05,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 10:09:05,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:05,661 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:05,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:05,884 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 [2022-07-13 10:09:05,884 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash -484194131, now seen corresponding path program 17 times [2022-07-13 10:09:05,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:05,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869703132] [2022-07-13 10:09:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:05,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:06,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:06,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869703132] [2022-07-13 10:09:06,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869703132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:06,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459474910] [2022-07-13 10:09:06,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:09:06,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:06,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:06,191 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) [2022-07-13 10:09:06,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 10:09:06,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-13 10:09:06,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:06,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-13 10:09:06,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:06,329 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 15 treesize of output 11 [2022-07-13 10:09:06,366 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:09:06,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:09:06,396 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:09:06,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:09:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 2 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:06,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:06,750 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 16 treesize of output 14 [2022-07-13 10:09:06,754 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 24 [2022-07-13 10:09:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:09:06,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459474910] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:06,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:06,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 33 [2022-07-13 10:09:06,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638794753] [2022-07-13 10:09:06,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:06,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 10:09:06,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 10:09:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 10:09:06,801 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 33 states have internal predecessors, (106), 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) [2022-07-13 10:09:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:07,455 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2022-07-13 10:09:07,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 10:09:07,456 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 33 states have internal predecessors, (106), 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 66 [2022-07-13 10:09:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:07,456 INFO L225 Difference]: With dead ends: 158 [2022-07-13 10:09:07,457 INFO L226 Difference]: Without dead ends: 156 [2022-07-13 10:09:07,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=2614, Unknown=0, NotChecked=0, Total=2862 [2022-07-13 10:09:07,458 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 90 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:07,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 516 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 10:09:07,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-13 10:09:07,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 114. [2022-07-13 10:09:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 113 states have internal predecessors, (128), 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) [2022-07-13 10:09:07,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2022-07-13 10:09:07,475 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 66 [2022-07-13 10:09:07,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:07,476 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2022-07-13 10:09:07,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 33 states have internal predecessors, (106), 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) [2022-07-13 10:09:07,476 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2022-07-13 10:09:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 10:09:07,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:07,476 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:07,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-13 10:09:07,677 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 [2022-07-13 10:09:07,677 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:07,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:07,677 INFO L85 PathProgramCache]: Analyzing trace with hash 484327704, now seen corresponding path program 18 times [2022-07-13 10:09:07,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:07,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352728497] [2022-07-13 10:09:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:07,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:07,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352728497] [2022-07-13 10:09:07,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352728497] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:07,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505929938] [2022-07-13 10:09:07,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:09:07,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:07,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:07,945 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) [2022-07-13 10:09:07,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 10:09:08,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-13 10:09:08,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:08,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 10:09:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:08,267 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 15 treesize of output 11 [2022-07-13 10:09:08,909 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:09:08,910 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 44 treesize of output 23 [2022-07-13 10:09:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 120 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:08,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:09,585 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 [2022-07-13 10:09:09,587 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 28 [2022-07-13 10:09:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:09,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505929938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:09,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:09,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 57 [2022-07-13 10:09:09,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302441373] [2022-07-13 10:09:09,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:09,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-13 10:09:09,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-13 10:09:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2805, Unknown=0, NotChecked=0, Total=3192 [2022-07-13 10:09:09,617 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 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) [2022-07-13 10:09:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:10,386 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2022-07-13 10:09:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-13 10:09:10,387 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 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 67 [2022-07-13 10:09:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:10,387 INFO L225 Difference]: With dead ends: 155 [2022-07-13 10:09:10,387 INFO L226 Difference]: Without dead ends: 115 [2022-07-13 10:09:10,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=779, Invalid=6361, Unknown=0, NotChecked=0, Total=7140 [2022-07-13 10:09:10,389 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:10,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 352 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 382 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-07-13 10:09:10,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-13 10:09:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-07-13 10:09:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 113 states have internal predecessors, (127), 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) [2022-07-13 10:09:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2022-07-13 10:09:10,406 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 67 [2022-07-13 10:09:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:10,406 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2022-07-13 10:09:10,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 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) [2022-07-13 10:09:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2022-07-13 10:09:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-13 10:09:10,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:10,407 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:10,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:10,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:10,628 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:10,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:10,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1368860765, now seen corresponding path program 19 times [2022-07-13 10:09:10,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:10,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707255964] [2022-07-13 10:09:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:10,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:10,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707255964] [2022-07-13 10:09:10,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707255964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415225064] [2022-07-13 10:09:10,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:09:10,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:10,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:10,984 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:10,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 10:09:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:11,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 10:09:11,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:11,131 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 15 treesize of output 11 [2022-07-13 10:09:11,184 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:09:11,185 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 27 treesize of output 26 [2022-07-13 10:09:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:11,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:11,618 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 16 treesize of output 14 [2022-07-13 10:09:11,620 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 24 [2022-07-13 10:09:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:11,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415225064] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:11,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:11,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24] total 35 [2022-07-13 10:09:11,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829501733] [2022-07-13 10:09:11,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:11,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 10:09:11,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:11,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 10:09:11,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 10:09:11,674 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 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) [2022-07-13 10:09:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:12,495 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2022-07-13 10:09:12,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-13 10:09:12,499 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 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 70 [2022-07-13 10:09:12,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:12,500 INFO L225 Difference]: With dead ends: 171 [2022-07-13 10:09:12,500 INFO L226 Difference]: Without dead ends: 169 [2022-07-13 10:09:12,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=294, Invalid=3866, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 10:09:12,502 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 92 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:12,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 658 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1354 Invalid, 0 Unknown, 9 Unchecked, 0.5s Time] [2022-07-13 10:09:12,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-13 10:09:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 119. [2022-07-13 10:09:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.11864406779661) internal successors, (132), 118 states have internal predecessors, (132), 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) [2022-07-13 10:09:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2022-07-13 10:09:12,521 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 70 [2022-07-13 10:09:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:12,522 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2022-07-13 10:09:12,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 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) [2022-07-13 10:09:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2022-07-13 10:09:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-13 10:09:12,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:12,523 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:12,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-13 10:09:12,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:12,727 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2098049336, now seen corresponding path program 20 times [2022-07-13 10:09:12,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:12,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623925572] [2022-07-13 10:09:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:12,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:13,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:13,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623925572] [2022-07-13 10:09:13,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623925572] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:13,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259321342] [2022-07-13 10:09:13,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:09:13,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:13,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:13,031 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:13,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-13 10:09:13,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:09:13,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:13,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-13 10:09:13,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:13,157 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 15 treesize of output 11 [2022-07-13 10:09:13,186 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:09:13,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:09:13,223 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:09:13,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:09:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 2 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:13,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:13,640 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 16 treesize of output 14 [2022-07-13 10:09:13,642 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 24 [2022-07-13 10:09:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:09:13,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259321342] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:13,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:13,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 36 [2022-07-13 10:09:13,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516646559] [2022-07-13 10:09:13,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:13,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-13 10:09:13,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:13,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-13 10:09:13,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2022-07-13 10:09:13,696 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 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) [2022-07-13 10:09:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:14,433 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2022-07-13 10:09:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 10:09:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 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 73 [2022-07-13 10:09:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:14,434 INFO L225 Difference]: With dead ends: 166 [2022-07-13 10:09:14,434 INFO L226 Difference]: Without dead ends: 164 [2022-07-13 10:09:14,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 127 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=270, Invalid=3152, Unknown=0, NotChecked=0, Total=3422 [2022-07-13 10:09:14,435 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 76 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:14,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 588 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 10:09:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-13 10:09:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 118. [2022-07-13 10:09:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 117 states have internal predecessors, (131), 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) [2022-07-13 10:09:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2022-07-13 10:09:14,454 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 73 [2022-07-13 10:09:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:14,455 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2022-07-13 10:09:14,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 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) [2022-07-13 10:09:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2022-07-13 10:09:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 10:09:14,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:14,456 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:14,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-13 10:09:14,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 10:09:14,663 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash 570522521, now seen corresponding path program 21 times [2022-07-13 10:09:14,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:14,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596569197] [2022-07-13 10:09:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:14,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:14,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596569197] [2022-07-13 10:09:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596569197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090875977] [2022-07-13 10:09:14,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:09:14,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:14,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:15,000 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:15,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-13 10:09:15,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-13 10:09:15,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:15,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 10:09:15,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:15,511 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 15 treesize of output 11 [2022-07-13 10:09:16,171 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:09:16,171 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 44 treesize of output 23 [2022-07-13 10:09:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:16,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:17,007 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 [2022-07-13 10:09:17,009 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 28 [2022-07-13 10:09:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 144 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:17,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090875977] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:17,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:17,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2022-07-13 10:09:17,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454943858] [2022-07-13 10:09:17,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:17,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-13 10:09:17,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:17,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-13 10:09:17,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3332, Unknown=0, NotChecked=0, Total=3782 [2022-07-13 10:09:17,039 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand has 62 states, 62 states have (on average 3.0) internal successors, (186), 62 states have internal predecessors, (186), 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) [2022-07-13 10:09:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:18,000 INFO L93 Difference]: Finished difference Result 163 states and 176 transitions. [2022-07-13 10:09:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-13 10:09:18,000 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.0) internal successors, (186), 62 states have internal predecessors, (186), 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 74 [2022-07-13 10:09:18,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:18,001 INFO L225 Difference]: With dead ends: 163 [2022-07-13 10:09:18,001 INFO L226 Difference]: Without dead ends: 119 [2022-07-13 10:09:18,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=905, Invalid=7651, Unknown=0, NotChecked=0, Total=8556 [2022-07-13 10:09:18,002 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 77 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:18,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 477 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 478 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-07-13 10:09:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-13 10:09:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-07-13 10:09:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1111111111111112) internal successors, (130), 117 states have internal predecessors, (130), 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) [2022-07-13 10:09:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2022-07-13 10:09:18,019 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 74 [2022-07-13 10:09:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:18,019 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2022-07-13 10:09:18,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.0) internal successors, (186), 62 states have internal predecessors, (186), 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) [2022-07-13 10:09:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2022-07-13 10:09:18,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 10:09:18,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:18,020 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:18,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-13 10:09:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-13 10:09:18,220 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash -121273682, now seen corresponding path program 22 times [2022-07-13 10:09:18,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:18,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776685483] [2022-07-13 10:09:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:18,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:18,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:18,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776685483] [2022-07-13 10:09:18,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776685483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:18,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732528432] [2022-07-13 10:09:18,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:09:18,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:18,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:18,543 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:18,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-13 10:09:18,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:09:18,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:18,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-13 10:09:18,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:18,707 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 15 treesize of output 11 [2022-07-13 10:09:18,762 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:09:18,762 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 27 treesize of output 26 [2022-07-13 10:09:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:19,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:19,214 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 16 treesize of output 14 [2022-07-13 10:09:19,215 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 24 [2022-07-13 10:09:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:19,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732528432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:19,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:19,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 38 [2022-07-13 10:09:19,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253114090] [2022-07-13 10:09:19,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:19,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-13 10:09:19,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-13 10:09:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 10:09:19,274 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:09:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:20,221 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2022-07-13 10:09:20,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-13 10:09:20,221 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-13 10:09:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:20,222 INFO L225 Difference]: With dead ends: 179 [2022-07-13 10:09:20,222 INFO L226 Difference]: Without dead ends: 177 [2022-07-13 10:09:20,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 135 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2022-07-13 10:09:20,223 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 96 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:20,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 765 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1482 Invalid, 0 Unknown, 62 Unchecked, 0.5s Time] [2022-07-13 10:09:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-13 10:09:20,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 123. [2022-07-13 10:09:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 states have internal predecessors, (135), 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) [2022-07-13 10:09:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2022-07-13 10:09:20,241 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 77 [2022-07-13 10:09:20,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:20,241 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2022-07-13 10:09:20,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:09:20,241 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2022-07-13 10:09:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 10:09:20,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:20,242 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:20,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-13 10:09:20,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-13 10:09:20,450 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:20,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:20,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1608606184, now seen corresponding path program 3 times [2022-07-13 10:09:20,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:20,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901280605] [2022-07-13 10:09:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:20,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:20,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:20,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901280605] [2022-07-13 10:09:20,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901280605] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:20,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822085561] [2022-07-13 10:09:20,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:09:20,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:20,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:20,656 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:20,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-13 10:09:20,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 10:09:20,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:20,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:09:20,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-07-13 10:09:20,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-07-13 10:09:20,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822085561] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:20,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:20,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 4] total 27 [2022-07-13 10:09:20,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224459370] [2022-07-13 10:09:20,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:20,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 10:09:20,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 10:09:20,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-07-13 10:09:20,939 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 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) [2022-07-13 10:09:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:21,414 INFO L93 Difference]: Finished difference Result 259 states and 274 transitions. [2022-07-13 10:09:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 10:09:21,415 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 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 77 [2022-07-13 10:09:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:21,416 INFO L225 Difference]: With dead ends: 259 [2022-07-13 10:09:21,416 INFO L226 Difference]: Without dead ends: 215 [2022-07-13 10:09:21,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=857, Invalid=1495, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 10:09:21,417 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 675 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:21,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 74 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:09:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-13 10:09:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 86. [2022-07-13 10:09:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 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) [2022-07-13 10:09:21,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2022-07-13 10:09:21,437 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 77 [2022-07-13 10:09:21,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:21,437 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2022-07-13 10:09:21,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 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) [2022-07-13 10:09:21,437 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2022-07-13 10:09:21,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-13 10:09:21,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:21,438 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:21,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-13 10:09:21,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-13 10:09:21,644 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2126096249, now seen corresponding path program 23 times [2022-07-13 10:09:21,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:21,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835663362] [2022-07-13 10:09:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:21,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:22,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835663362] [2022-07-13 10:09:22,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835663362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640497987] [2022-07-13 10:09:22,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:09:22,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:22,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:22,048 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:22,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-13 10:09:22,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-13 10:09:22,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:22,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-13 10:09:22,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:22,275 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 15 treesize of output 11 [2022-07-13 10:09:22,310 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:09:22,310 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 25 treesize of output 24 [2022-07-13 10:09:22,352 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:09:22,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:09:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 2 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:22,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:22,824 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 16 treesize of output 14 [2022-07-13 10:09:22,826 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 24 [2022-07-13 10:09:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:09:22,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640497987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:22,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:22,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 39 [2022-07-13 10:09:22,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216809279] [2022-07-13 10:09:22,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:22,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 10:09:22,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:22,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 10:09:22,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 10:09:22,885 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 states have internal predecessors, (128), 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) [2022-07-13 10:09:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:23,887 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2022-07-13 10:09:23,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-13 10:09:23,887 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 states have internal predecessors, (128), 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 80 [2022-07-13 10:09:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:23,891 INFO L225 Difference]: With dead ends: 134 [2022-07-13 10:09:23,891 INFO L226 Difference]: Without dead ends: 132 [2022-07-13 10:09:23,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 140 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=292, Invalid=3740, Unknown=0, NotChecked=0, Total=4032 [2022-07-13 10:09:23,894 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:23,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 701 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 10:09:23,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-13 10:09:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 82. [2022-07-13 10:09:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:09:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-07-13 10:09:23,916 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2022-07-13 10:09:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:23,916 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-07-13 10:09:23,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 39 states have internal predecessors, (128), 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) [2022-07-13 10:09:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-07-13 10:09:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-13 10:09:23,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:23,917 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:23,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-13 10:09:24,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:24,127 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:24,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:24,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1219209508, now seen corresponding path program 24 times [2022-07-13 10:09:24,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:24,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039957216] [2022-07-13 10:09:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:24,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:24,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:24,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039957216] [2022-07-13 10:09:24,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039957216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:24,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464900473] [2022-07-13 10:09:24,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:09:24,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:24,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:24,536 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:24,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-13 10:09:24,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-13 10:09:24,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:24,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 10:09:24,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:25,113 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 15 treesize of output 11 [2022-07-13 10:09:27,937 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:09:27,937 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 44 treesize of output 23 [2022-07-13 10:09:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 190 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:27,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:28,885 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 [2022-07-13 10:09:28,887 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 28 [2022-07-13 10:09:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 180 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:28,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464900473] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:28,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:28,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 67 [2022-07-13 10:09:28,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251109997] [2022-07-13 10:09:28,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:28,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-13 10:09:28,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:28,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-13 10:09:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=3903, Unknown=1, NotChecked=0, Total=4422 [2022-07-13 10:09:28,918 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 67 states have internal predecessors, (204), 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) [2022-07-13 10:09:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:30,440 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2022-07-13 10:09:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-13 10:09:30,441 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 67 states have internal predecessors, (204), 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 81 [2022-07-13 10:09:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:30,441 INFO L225 Difference]: With dead ends: 133 [2022-07-13 10:09:30,441 INFO L226 Difference]: Without dead ends: 85 [2022-07-13 10:09:30,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2372 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1269, Invalid=11162, Unknown=1, NotChecked=0, Total=12432 [2022-07-13 10:09:30,444 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:30,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 585 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 593 Invalid, 0 Unknown, 188 Unchecked, 0.2s Time] [2022-07-13 10:09:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-13 10:09:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-13 10:09:30,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 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) [2022-07-13 10:09:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-07-13 10:09:30,469 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2022-07-13 10:09:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:30,469 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-07-13 10:09:30,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 67 states have internal predecessors, (204), 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) [2022-07-13 10:09:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-07-13 10:09:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 10:09:30,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:30,470 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:30,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-13 10:09:30,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:30,675 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:30,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1155895185, now seen corresponding path program 25 times [2022-07-13 10:09:30,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:30,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549327366] [2022-07-13 10:09:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:30,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:31,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:31,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549327366] [2022-07-13 10:09:31,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549327366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:31,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976488353] [2022-07-13 10:09:31,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:09:31,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:31,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:31,085 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:31,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-13 10:09:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:31,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-13 10:09:31,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:31,236 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 15 treesize of output 11 [2022-07-13 10:09:31,285 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:09:31,285 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 27 treesize of output 26 [2022-07-13 10:09:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:31,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:31,798 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 16 treesize of output 14 [2022-07-13 10:09:31,805 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 24 [2022-07-13 10:09:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:31,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976488353] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:31,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:31,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 28] total 41 [2022-07-13 10:09:31,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135504537] [2022-07-13 10:09:31,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:31,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-13 10:09:31,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:31,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-13 10:09:31,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 10:09:31,873 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 41 states have internal predecessors, (134), 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) [2022-07-13 10:09:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:33,037 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2022-07-13 10:09:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-13 10:09:33,038 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 41 states have internal predecessors, (134), 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 84 [2022-07-13 10:09:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:33,038 INFO L225 Difference]: With dead ends: 150 [2022-07-13 10:09:33,039 INFO L226 Difference]: Without dead ends: 148 [2022-07-13 10:09:33,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 148 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=348, Invalid=5504, Unknown=0, NotChecked=0, Total=5852 [2022-07-13 10:09:33,040 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 128 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:33,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 780 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1774 Invalid, 0 Unknown, 9 Unchecked, 0.6s Time] [2022-07-13 10:09:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-13 10:09:33,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2022-07-13 10:09:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 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) [2022-07-13 10:09:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-07-13 10:09:33,072 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 84 [2022-07-13 10:09:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:33,073 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-07-13 10:09:33,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 41 states have internal predecessors, (134), 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) [2022-07-13 10:09:33,073 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-07-13 10:09:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-13 10:09:33,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:33,073 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:33,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:33,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-13 10:09:33,287 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:33,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:33,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1686397252, now seen corresponding path program 26 times [2022-07-13 10:09:33,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:33,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714959950] [2022-07-13 10:09:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:33,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:33,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:33,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714959950] [2022-07-13 10:09:33,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714959950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:33,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348751851] [2022-07-13 10:09:33,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:09:33,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:33,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:33,756 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:33,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-13 10:09:33,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:09:33,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:33,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-13 10:09:33,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:33,927 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 15 treesize of output 11 [2022-07-13 10:09:33,957 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:09:33,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:09:33,992 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:09:33,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:09:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 2 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:34,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:34,531 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 16 treesize of output 14 [2022-07-13 10:09:34,533 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 24 [2022-07-13 10:09:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:09:34,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348751851] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:34,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:34,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 42 [2022-07-13 10:09:34,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905466743] [2022-07-13 10:09:34,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:34,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-13 10:09:34,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:34,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-13 10:09:34,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 10:09:34,601 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 states have internal predecessors, (139), 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) [2022-07-13 10:09:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:35,699 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2022-07-13 10:09:35,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-13 10:09:35,700 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 states have internal predecessors, (139), 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 87 [2022-07-13 10:09:35,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:35,700 INFO L225 Difference]: With dead ends: 145 [2022-07-13 10:09:35,700 INFO L226 Difference]: Without dead ends: 143 [2022-07-13 10:09:35,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 153 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2022-07-13 10:09:35,701 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 80 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:35,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 768 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 10:09:35,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-13 10:09:35,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 89. [2022-07-13 10:09:35,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 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) [2022-07-13 10:09:35,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-07-13 10:09:35,725 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2022-07-13 10:09:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:35,725 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-07-13 10:09:35,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 states have internal predecessors, (139), 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) [2022-07-13 10:09:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-07-13 10:09:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-13 10:09:35,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:35,726 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:35,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:35,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:35,939 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash -681456027, now seen corresponding path program 27 times [2022-07-13 10:09:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:35,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817188463] [2022-07-13 10:09:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:35,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:36,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:36,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817188463] [2022-07-13 10:09:36,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817188463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:36,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112737502] [2022-07-13 10:09:36,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:09:36,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:36,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:36,396 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:36,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-13 10:09:36,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-13 10:09:36,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:36,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 10:09:36,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:36,955 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 15 treesize of output 11 [2022-07-13 10:09:37,797 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:09:37,797 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 44 treesize of output 23 [2022-07-13 10:09:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 231 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:37,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:38,834 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 [2022-07-13 10:09:38,836 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 28 [2022-07-13 10:09:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:38,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112737502] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:38,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:38,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 72 [2022-07-13 10:09:38,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586326800] [2022-07-13 10:09:38,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:38,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-13 10:09:38,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:38,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-13 10:09:38,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=4521, Unknown=0, NotChecked=0, Total=5112 [2022-07-13 10:09:38,870 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 72 states, 72 states have (on average 3.0833333333333335) internal successors, (222), 72 states have internal predecessors, (222), 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) [2022-07-13 10:09:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:40,173 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2022-07-13 10:09:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-13 10:09:40,173 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.0833333333333335) internal successors, (222), 72 states have internal predecessors, (222), 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 88 [2022-07-13 10:09:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:40,174 INFO L225 Difference]: With dead ends: 144 [2022-07-13 10:09:40,174 INFO L226 Difference]: Without dead ends: 92 [2022-07-13 10:09:40,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2157 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1184, Invalid=10588, Unknown=0, NotChecked=0, Total=11772 [2022-07-13 10:09:40,175 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:40,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 621 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 631 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2022-07-13 10:09:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-13 10:09:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-07-13 10:09:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 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) [2022-07-13 10:09:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-07-13 10:09:40,206 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2022-07-13 10:09:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:40,207 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-07-13 10:09:40,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.0833333333333335) internal successors, (222), 72 states have internal predecessors, (222), 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) [2022-07-13 10:09:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-07-13 10:09:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:09:40,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:40,208 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:40,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:40,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:40,421 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:40,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:40,422 INFO L85 PathProgramCache]: Analyzing trace with hash -435336006, now seen corresponding path program 28 times [2022-07-13 10:09:40,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:40,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085285255] [2022-07-13 10:09:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:40,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:40,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:40,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085285255] [2022-07-13 10:09:40,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085285255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:40,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335837175] [2022-07-13 10:09:40,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:09:40,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:40,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:40,880 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:40,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-13 10:09:40,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:09:40,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:40,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-13 10:09:40,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:41,058 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 15 treesize of output 11 [2022-07-13 10:09:41,110 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:09:41,110 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 27 treesize of output 26 [2022-07-13 10:09:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:41,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:41,679 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 16 treesize of output 14 [2022-07-13 10:09:41,681 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 24 [2022-07-13 10:09:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:41,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335837175] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:41,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:41,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 44 [2022-07-13 10:09:41,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888113190] [2022-07-13 10:09:41,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:41,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-13 10:09:41,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-13 10:09:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 10:09:41,754 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 44 states, 44 states have (on average 3.2954545454545454) internal successors, (145), 44 states have internal predecessors, (145), 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) [2022-07-13 10:09:43,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:43,056 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2022-07-13 10:09:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-13 10:09:43,056 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.2954545454545454) internal successors, (145), 44 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-13 10:09:43,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:43,057 INFO L225 Difference]: With dead ends: 161 [2022-07-13 10:09:43,057 INFO L226 Difference]: Without dead ends: 159 [2022-07-13 10:09:43,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 161 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=375, Invalid=6431, Unknown=0, NotChecked=0, Total=6806 [2022-07-13 10:09:43,058 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 108 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:43,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 930 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2022 Invalid, 0 Unknown, 71 Unchecked, 0.7s Time] [2022-07-13 10:09:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-13 10:09:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 100. [2022-07-13 10:09:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 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) [2022-07-13 10:09:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-07-13 10:09:43,081 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 91 [2022-07-13 10:09:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:43,081 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-07-13 10:09:43,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.2954545454545454) internal successors, (145), 44 states have internal predecessors, (145), 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) [2022-07-13 10:09:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-07-13 10:09:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-13 10:09:43,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:43,082 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:43,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-13 10:09:43,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-13 10:09:43,283 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:43,283 INFO L85 PathProgramCache]: Analyzing trace with hash 217035333, now seen corresponding path program 29 times [2022-07-13 10:09:43,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:43,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032469260] [2022-07-13 10:09:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:43,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:43,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:43,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032469260] [2022-07-13 10:09:43,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032469260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:43,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873811508] [2022-07-13 10:09:43,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:09:43,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:43,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:43,827 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:43,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-13 10:09:44,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-13 10:09:44,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:44,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-13 10:09:44,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:44,147 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 15 treesize of output 11 [2022-07-13 10:09:44,186 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:09:44,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:09:44,222 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:09:44,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:09:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 2 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:44,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:44,833 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 16 treesize of output 14 [2022-07-13 10:09:44,835 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 24 [2022-07-13 10:09:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:09:44,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873811508] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:44,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:44,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 45 [2022-07-13 10:09:44,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957820317] [2022-07-13 10:09:44,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:44,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-13 10:09:44,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:44,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-13 10:09:44,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 10:09:44,908 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 45 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 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) [2022-07-13 10:09:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:46,135 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2022-07-13 10:09:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-13 10:09:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 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 94 [2022-07-13 10:09:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:46,136 INFO L225 Difference]: With dead ends: 156 [2022-07-13 10:09:46,136 INFO L226 Difference]: Without dead ends: 154 [2022-07-13 10:09:46,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 166 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=336, Invalid=5066, Unknown=0, NotChecked=0, Total=5402 [2022-07-13 10:09:46,137 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:46,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 921 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 10:09:46,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-13 10:09:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 96. [2022-07-13 10:09:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 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) [2022-07-13 10:09:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-07-13 10:09:46,167 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2022-07-13 10:09:46,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:46,167 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-07-13 10:09:46,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 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) [2022-07-13 10:09:46,167 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-07-13 10:09:46,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-13 10:09:46,167 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:46,167 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:46,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-13 10:09:46,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-13 10:09:46,368 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:46,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:46,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1504152880, now seen corresponding path program 30 times [2022-07-13 10:09:46,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:46,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930816897] [2022-07-13 10:09:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:46,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:47,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:47,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930816897] [2022-07-13 10:09:47,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930816897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:47,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142925525] [2022-07-13 10:09:47,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:09:47,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:47,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:47,033 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:47,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-13 10:09:47,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-13 10:09:47,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 10:09:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:47,774 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 15 treesize of output 11 [2022-07-13 10:09:48,742 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:09:48,743 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 44 treesize of output 23 [2022-07-13 10:09:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 276 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:48,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:49,755 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 [2022-07-13 10:09:49,757 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 28 [2022-07-13 10:09:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 264 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:49,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142925525] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:49,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:49,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 76 [2022-07-13 10:09:49,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561861686] [2022-07-13 10:09:49,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:49,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-13 10:09:49,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-13 10:09:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=4904, Unknown=0, NotChecked=0, Total=5700 [2022-07-13 10:09:49,799 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 76 states, 76 states have (on average 3.1578947368421053) internal successors, (240), 76 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:09:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:51,155 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2022-07-13 10:09:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-13 10:09:51,155 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.1578947368421053) internal successors, (240), 76 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-07-13 10:09:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:51,156 INFO L225 Difference]: With dead ends: 155 [2022-07-13 10:09:51,156 INFO L226 Difference]: Without dead ends: 99 [2022-07-13 10:09:51,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3461 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1649, Invalid=11691, Unknown=0, NotChecked=0, Total=13340 [2022-07-13 10:09:51,158 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 152 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:51,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 574 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 507 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2022-07-13 10:09:51,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-13 10:09:51,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-13 10:09:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 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) [2022-07-13 10:09:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-07-13 10:09:51,200 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 95 [2022-07-13 10:09:51,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:51,200 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-07-13 10:09:51,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.1578947368421053) internal successors, (240), 76 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:09:51,200 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-07-13 10:09:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-13 10:09:51,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:51,201 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:51,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:51,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-13 10:09:51,415 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:51,416 INFO L85 PathProgramCache]: Analyzing trace with hash -696896197, now seen corresponding path program 31 times [2022-07-13 10:09:51,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:51,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223323886] [2022-07-13 10:09:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:51,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:52,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:52,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223323886] [2022-07-13 10:09:52,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223323886] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:52,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839613117] [2022-07-13 10:09:52,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:09:52,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:52,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:52,066 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:09:52,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-13 10:09:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-13 10:09:52,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:52,463 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 15 treesize of output 11 [2022-07-13 10:09:52,529 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:09:52,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:09:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:53,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:55,544 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1061| Int)) (or (forall ((v_ArrVal_1445 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1061| 4)) v_ArrVal_1445) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1061|)))) is different from false [2022-07-13 10:09:55,548 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 23 treesize of output 21 [2022-07-13 10:09:55,550 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 178 treesize of output 170 [2022-07-13 10:09:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-07-13 10:09:55,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839613117] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:55,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:55,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 32] total 76 [2022-07-13 10:09:55,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576280425] [2022-07-13 10:09:55,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:55,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-13 10:09:55,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:55,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-13 10:09:55,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=5228, Unknown=1, NotChecked=146, Total=5700 [2022-07-13 10:09:55,752 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 76 states, 76 states have (on average 3.25) internal successors, (247), 76 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:09:58,504 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (<= .cse0 48) (forall ((|v_ULTIMATE.start_main_~i~0#1_1061| Int)) (or (forall ((v_ArrVal_1445 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1061| 4)) v_ArrVal_1445) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1061|)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 12 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) 0))) is different from false [2022-07-13 10:09:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:59,481 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2022-07-13 10:09:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-13 10:09:59,481 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.25) internal successors, (247), 76 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-07-13 10:09:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:59,482 INFO L225 Difference]: With dead ends: 109 [2022-07-13 10:09:59,482 INFO L226 Difference]: Without dead ends: 107 [2022-07-13 10:09:59,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 153 SyntacticMatches, 10 SemanticMatches, 105 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=610, Invalid=10316, Unknown=2, NotChecked=414, Total=11342 [2022-07-13 10:09:59,483 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 146 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 2563 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:59,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1050 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2563 Invalid, 0 Unknown, 177 Unchecked, 0.9s Time] [2022-07-13 10:09:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-13 10:09:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-07-13 10:09:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 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) [2022-07-13 10:09:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-07-13 10:09:59,514 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-07-13 10:09:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:59,514 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-07-13 10:09:59,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.25) internal successors, (247), 76 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:09:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-07-13 10:09:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-13 10:09:59,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:59,515 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:59,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-13 10:09:59,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:59,715 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1569305295, now seen corresponding path program 32 times [2022-07-13 10:09:59,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:59,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904846705] [2022-07-13 10:09:59,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:59,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:00,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:00,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904846705] [2022-07-13 10:10:00,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904846705] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:00,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475548130] [2022-07-13 10:10:00,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:10:00,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:00,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:00,296 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:00,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-13 10:10:00,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:10:00,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:00,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-13 10:10:00,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:00,497 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 15 treesize of output 11 [2022-07-13 10:10:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:01,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:01,126 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 16 treesize of output 14 [2022-07-13 10:10:01,128 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 24 [2022-07-13 10:10:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:01,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475548130] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:01,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:01,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 47 [2022-07-13 10:10:01,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860995142] [2022-07-13 10:10:01,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:01,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-13 10:10:01,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-13 10:10:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-07-13 10:10:01,214 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 47 states, 47 states have (on average 3.425531914893617) internal successors, (161), 47 states have internal predecessors, (161), 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) [2022-07-13 10:10:02,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:02,715 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2022-07-13 10:10:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-13 10:10:02,715 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.425531914893617) internal successors, (161), 47 states have internal predecessors, (161), 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 102 [2022-07-13 10:10:02,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:02,715 INFO L225 Difference]: With dead ends: 114 [2022-07-13 10:10:02,715 INFO L226 Difference]: Without dead ends: 112 [2022-07-13 10:10:02,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 184 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=326, Invalid=5680, Unknown=0, NotChecked=0, Total=6006 [2022-07-13 10:10:02,717 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 2887 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:02,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 1024 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2887 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 10:10:02,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-13 10:10:02,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2022-07-13 10:10:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 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) [2022-07-13 10:10:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-07-13 10:10:02,748 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2022-07-13 10:10:02,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:02,748 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-07-13 10:10:02,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.425531914893617) internal successors, (161), 47 states have internal predecessors, (161), 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) [2022-07-13 10:10:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-07-13 10:10:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 10:10:02,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:02,749 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:02,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-13 10:10:02,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-13 10:10:02,949 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:02,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:02,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1071810009, now seen corresponding path program 33 times [2022-07-13 10:10:02,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:02,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579032919] [2022-07-13 10:10:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:02,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 339 proven. 340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:03,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:03,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579032919] [2022-07-13 10:10:03,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579032919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:03,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038362514] [2022-07-13 10:10:03,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:10:03,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:03,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:03,343 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:03,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-13 10:10:03,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-13 10:10:03,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:03,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 10:10:03,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:04,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:04,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038362514] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:04,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:04,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-07-13 10:10:04,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035188434] [2022-07-13 10:10:04,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:04,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-13 10:10:04,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-13 10:10:04,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2022-07-13 10:10:04,431 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 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) [2022-07-13 10:10:04,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:04,748 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2022-07-13 10:10:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-13 10:10:04,748 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 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 106 [2022-07-13 10:10:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:04,748 INFO L225 Difference]: With dead ends: 184 [2022-07-13 10:10:04,748 INFO L226 Difference]: Without dead ends: 120 [2022-07-13 10:10:04,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 10:10:04,749 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 277 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:04,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 246 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:10:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-13 10:10:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2022-07-13 10:10:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 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) [2022-07-13 10:10:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-07-13 10:10:04,777 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 106 [2022-07-13 10:10:04,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:04,777 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-07-13 10:10:04,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 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) [2022-07-13 10:10:04,777 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-07-13 10:10:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 10:10:04,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:04,778 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:04,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-13 10:10:04,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-13 10:10:04,978 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:04,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:04,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1078465220, now seen corresponding path program 34 times [2022-07-13 10:10:04,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:04,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514339803] [2022-07-13 10:10:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:04,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:05,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:05,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514339803] [2022-07-13 10:10:05,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514339803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:05,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255676376] [2022-07-13 10:10:05,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:10:05,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:05,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:05,563 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:05,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-13 10:10:05,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:10:05,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:05,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-13 10:10:05,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:05,770 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 15 treesize of output 11 [2022-07-13 10:10:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:06,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:06,477 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 16 treesize of output 14 [2022-07-13 10:10:06,479 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 24 [2022-07-13 10:10:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:06,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255676376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:06,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:06,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 50 [2022-07-13 10:10:06,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455059904] [2022-07-13 10:10:06,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:06,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-13 10:10:06,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:06,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-13 10:10:06,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-07-13 10:10:06,573 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 50 states, 50 states have (on average 3.44) internal successors, (172), 50 states have internal predecessors, (172), 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) [2022-07-13 10:10:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:08,233 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-07-13 10:10:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-13 10:10:08,233 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.44) internal successors, (172), 50 states have internal predecessors, (172), 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 109 [2022-07-13 10:10:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:08,234 INFO L225 Difference]: With dead ends: 121 [2022-07-13 10:10:08,234 INFO L226 Difference]: Without dead ends: 119 [2022-07-13 10:10:08,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 197 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=347, Invalid=6459, Unknown=0, NotChecked=0, Total=6806 [2022-07-13 10:10:08,235 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 90 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 3320 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 3428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 3320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:08,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 1184 Invalid, 3428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 3320 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 10:10:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-13 10:10:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2022-07-13 10:10:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 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) [2022-07-13 10:10:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-07-13 10:10:08,267 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 109 [2022-07-13 10:10:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:08,268 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-07-13 10:10:08,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.44) internal successors, (172), 50 states have internal predecessors, (172), 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) [2022-07-13 10:10:08,268 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-07-13 10:10:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-13 10:10:08,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:08,269 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:08,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:08,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:08,473 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:08,473 INFO L85 PathProgramCache]: Analyzing trace with hash 606739634, now seen corresponding path program 35 times [2022-07-13 10:10:08,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:08,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351486830] [2022-07-13 10:10:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:08,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 393 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:08,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:08,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351486830] [2022-07-13 10:10:08,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351486830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:08,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735629482] [2022-07-13 10:10:08,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:10:08,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:08,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:08,836 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:08,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-13 10:10:09,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-13 10:10:09,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:09,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 10:10:09,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:09,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:09,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735629482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:09,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:09,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-07-13 10:10:09,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559362815] [2022-07-13 10:10:09,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:09,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-13 10:10:09,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:09,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-13 10:10:09,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 10:10:09,719 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:10:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:10,076 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2022-07-13 10:10:10,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 10:10:10,076 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-13 10:10:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:10,077 INFO L225 Difference]: With dead ends: 195 [2022-07-13 10:10:10,077 INFO L226 Difference]: Without dead ends: 127 [2022-07-13 10:10:10,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2022-07-13 10:10:10,078 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 240 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:10,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 253 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:10:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-13 10:10:10,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-07-13 10:10:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 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) [2022-07-13 10:10:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-07-13 10:10:10,109 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2022-07-13 10:10:10,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:10,109 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-07-13 10:10:10,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:10:10,109 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-07-13 10:10:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-13 10:10:10,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:10,109 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:10,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-13 10:10:10,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-13 10:10:10,310 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:10,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:10,310 INFO L85 PathProgramCache]: Analyzing trace with hash -269420547, now seen corresponding path program 36 times [2022-07-13 10:10:10,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:10,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481834665] [2022-07-13 10:10:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:10,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:10,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481834665] [2022-07-13 10:10:10,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481834665] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822763607] [2022-07-13 10:10:10,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:10:10,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:10,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:10,924 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:10,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-13 10:10:12,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-13 10:10:12,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:12,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 10:10:12,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:12,758 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 15 treesize of output 11 [2022-07-13 10:10:14,107 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:10:14,107 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 44 treesize of output 23 [2022-07-13 10:10:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 435 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:14,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:15,711 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 [2022-07-13 10:10:15,713 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 28 [2022-07-13 10:10:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 420 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:15,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822763607] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:15,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:15,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 92 [2022-07-13 10:10:15,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142539740] [2022-07-13 10:10:15,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:15,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-13 10:10:15,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-13 10:10:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=7439, Unknown=0, NotChecked=0, Total=8372 [2022-07-13 10:10:15,764 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 92 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 92 states have internal predecessors, (294), 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) [2022-07-13 10:10:17,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:17,850 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2022-07-13 10:10:17,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-13 10:10:17,851 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 92 states have internal predecessors, (294), 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 116 [2022-07-13 10:10:17,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:17,851 INFO L225 Difference]: With dead ends: 188 [2022-07-13 10:10:17,851 INFO L226 Difference]: Without dead ends: 120 [2022-07-13 10:10:17,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3531 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1850, Invalid=17890, Unknown=0, NotChecked=0, Total=19740 [2022-07-13 10:10:17,853 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:17,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1014 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 935 Invalid, 0 Unknown, 150 Unchecked, 0.3s Time] [2022-07-13 10:10:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-13 10:10:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-13 10:10:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 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) [2022-07-13 10:10:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-07-13 10:10:17,889 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2022-07-13 10:10:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:17,889 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-07-13 10:10:17,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 92 states have internal predecessors, (294), 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) [2022-07-13 10:10:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-07-13 10:10:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-13 10:10:17,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:17,890 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:17,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-13 10:10:18,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:18,091 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1441114926, now seen corresponding path program 37 times [2022-07-13 10:10:18,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:18,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383667855] [2022-07-13 10:10:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:18,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:18,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:18,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383667855] [2022-07-13 10:10:18,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383667855] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:18,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661393166] [2022-07-13 10:10:18,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:10:18,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:18,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:18,832 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:18,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-13 10:10:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:18,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-13 10:10:18,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:19,063 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 15 treesize of output 11 [2022-07-13 10:10:19,133 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:10:19,134 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 27 treesize of output 26 [2022-07-13 10:10:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:19,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:20,013 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 16 treesize of output 14 [2022-07-13 10:10:20,014 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 24 [2022-07-13 10:10:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:20,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661393166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:20,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:20,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 38] total 56 [2022-07-13 10:10:20,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441947377] [2022-07-13 10:10:20,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:20,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-13 10:10:20,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-13 10:10:20,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2901, Unknown=0, NotChecked=0, Total=3080 [2022-07-13 10:10:20,113 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 56 states, 56 states have (on average 3.375) internal successors, (189), 56 states have internal predecessors, (189), 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) [2022-07-13 10:10:22,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:22,274 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2022-07-13 10:10:22,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-13 10:10:22,274 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.375) internal successors, (189), 56 states have internal predecessors, (189), 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 119 [2022-07-13 10:10:22,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:22,275 INFO L225 Difference]: With dead ends: 210 [2022-07-13 10:10:22,275 INFO L226 Difference]: Without dead ends: 208 [2022-07-13 10:10:22,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 213 SyntacticMatches, 7 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=508, Invalid=10834, Unknown=0, NotChecked=0, Total=11342 [2022-07-13 10:10:22,276 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 185 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 3377 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 3630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 3377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:22,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1532 Invalid, 3630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 3377 Invalid, 0 Unknown, 40 Unchecked, 1.2s Time] [2022-07-13 10:10:22,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-13 10:10:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 128. [2022-07-13 10:10:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 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) [2022-07-13 10:10:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-07-13 10:10:22,323 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 119 [2022-07-13 10:10:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:22,323 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-07-13 10:10:22,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.375) internal successors, (189), 56 states have internal predecessors, (189), 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) [2022-07-13 10:10:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-07-13 10:10:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-13 10:10:22,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:22,324 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:22,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-13 10:10:22,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:22,524 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:22,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:22,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2105822173, now seen corresponding path program 38 times [2022-07-13 10:10:22,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:22,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041446975] [2022-07-13 10:10:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:22,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:23,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:23,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041446975] [2022-07-13 10:10:23,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041446975] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:23,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650518189] [2022-07-13 10:10:23,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:10:23,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:23,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:23,204 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:23,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-13 10:10:23,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:10:23,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:23,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-13 10:10:23,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:23,444 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 15 treesize of output 11 [2022-07-13 10:10:23,481 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:10:23,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:10:23,583 INFO L356 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2022-07-13 10:10:23,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2022-07-13 10:10:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 2 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:24,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:25,373 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1488| Int)) (or (and (= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1488| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 60 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= |v_ULTIMATE.start_main_~i~0#1_1488| 14))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1488|)))) is different from false [2022-07-13 10:10:25,379 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 23 treesize of output 21 [2022-07-13 10:10:25,381 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 49 treesize of output 45 [2022-07-13 10:10:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 910 refuted. 0 times theorem prover too weak. 0 trivial. 17 not checked. [2022-07-13 10:10:25,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650518189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:25,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:25,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 63 [2022-07-13 10:10:25,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543035998] [2022-07-13 10:10:25,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:25,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-13 10:10:25,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:25,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-13 10:10:25,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=3547, Unknown=1, NotChecked=120, Total=3906 [2022-07-13 10:10:25,507 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 63 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 63 states have internal predecessors, (202), 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) [2022-07-13 10:10:26,767 WARN L833 $PredicateComparison]: unable to prove that (and (<= 15 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 15) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_1488| Int)) (or (and (= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1488| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 60 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= |v_ULTIMATE.start_main_~i~0#1_1488| 14))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1488|))))) is different from false [2022-07-13 10:10:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:26,903 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2022-07-13 10:10:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-13 10:10:26,903 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 63 states have internal predecessors, (202), 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 122 [2022-07-13 10:10:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:26,904 INFO L225 Difference]: With dead ends: 195 [2022-07-13 10:10:26,904 INFO L226 Difference]: Without dead ends: 193 [2022-07-13 10:10:26,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 215 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=300, Invalid=5558, Unknown=2, NotChecked=302, Total=6162 [2022-07-13 10:10:26,905 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 97 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:26,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1333 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2020 Invalid, 0 Unknown, 212 Unchecked, 0.7s Time] [2022-07-13 10:10:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-13 10:10:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 124. [2022-07-13 10:10:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 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) [2022-07-13 10:10:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-07-13 10:10:26,959 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 122 [2022-07-13 10:10:26,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:26,959 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-07-13 10:10:26,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 63 states have internal predecessors, (202), 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) [2022-07-13 10:10:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-07-13 10:10:26,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-13 10:10:26,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:26,960 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:26,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:27,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-13 10:10:27,179 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:27,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1052587704, now seen corresponding path program 39 times [2022-07-13 10:10:27,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:27,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919113531] [2022-07-13 10:10:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:27,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:27,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:27,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919113531] [2022-07-13 10:10:27,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919113531] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:27,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111517490] [2022-07-13 10:10:27,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:10:27,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:27,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:27,859 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:27,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-13 10:10:28,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-13 10:10:28,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:28,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-13 10:10:28,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:29,145 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 15 treesize of output 11 [2022-07-13 10:10:30,600 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:10:30,600 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 44 treesize of output 23 [2022-07-13 10:10:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 496 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:30,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:32,778 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 [2022-07-13 10:10:32,780 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 28 [2022-07-13 10:10:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 480 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:32,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111517490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:32,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:32,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 97 [2022-07-13 10:10:32,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935934583] [2022-07-13 10:10:32,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:32,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-13 10:10:32,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:32,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-13 10:10:32,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1031, Invalid=8279, Unknown=2, NotChecked=0, Total=9312 [2022-07-13 10:10:32,827 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 97 states, 97 states have (on average 3.216494845360825) internal successors, (312), 97 states have internal predecessors, (312), 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) [2022-07-13 10:10:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:35,861 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2022-07-13 10:10:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-13 10:10:35,861 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.216494845360825) internal successors, (312), 97 states have internal predecessors, (312), 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 123 [2022-07-13 10:10:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:35,862 INFO L225 Difference]: With dead ends: 199 [2022-07-13 10:10:35,862 INFO L226 Difference]: Without dead ends: 127 [2022-07-13 10:10:35,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5117 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2496, Invalid=24892, Unknown=2, NotChecked=0, Total=27390 [2022-07-13 10:10:35,864 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 102 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:35,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 989 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1125 Invalid, 0 Unknown, 490 Unchecked, 0.4s Time] [2022-07-13 10:10:35,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-13 10:10:35,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-13 10:10:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 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) [2022-07-13 10:10:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-07-13 10:10:35,916 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 123 [2022-07-13 10:10:35,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:35,916 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-07-13 10:10:35,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.216494845360825) internal successors, (312), 97 states have internal predecessors, (312), 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) [2022-07-13 10:10:35,917 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-07-13 10:10:35,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-13 10:10:35,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:35,917 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:35,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-07-13 10:10:36,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-13 10:10:36,118 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:36,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1366573779, now seen corresponding path program 40 times [2022-07-13 10:10:36,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:36,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539796952] [2022-07-13 10:10:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:36,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:36,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:36,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539796952] [2022-07-13 10:10:36,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539796952] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:36,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796018237] [2022-07-13 10:10:36,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:10:36,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:36,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:36,948 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:36,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-13 10:10:37,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:10:37,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:37,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-13 10:10:37,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:37,207 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 15 treesize of output 11 [2022-07-13 10:10:37,271 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:10:37,271 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 27 treesize of output 26 [2022-07-13 10:10:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:38,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:38,219 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 16 treesize of output 14 [2022-07-13 10:10:38,220 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 24 [2022-07-13 10:10:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:38,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796018237] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:38,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:38,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 40] total 59 [2022-07-13 10:10:38,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42166815] [2022-07-13 10:10:38,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:38,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-13 10:10:38,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-13 10:10:38,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3233, Unknown=0, NotChecked=0, Total=3422 [2022-07-13 10:10:38,345 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 59 states, 59 states have (on average 3.389830508474576) internal successors, (200), 59 states have internal predecessors, (200), 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) [2022-07-13 10:10:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:40,818 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2022-07-13 10:10:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-13 10:10:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.389830508474576) internal successors, (200), 59 states have internal predecessors, (200), 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 126 [2022-07-13 10:10:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:40,819 INFO L225 Difference]: With dead ends: 216 [2022-07-13 10:10:40,819 INFO L226 Difference]: Without dead ends: 214 [2022-07-13 10:10:40,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 226 SyntacticMatches, 7 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2818 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=510, Invalid=12146, Unknown=0, NotChecked=0, Total=12656 [2022-07-13 10:10:40,821 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 186 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 3992 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 4314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 3992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:40,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 1762 Invalid, 4314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 3992 Invalid, 0 Unknown, 96 Unchecked, 1.4s Time] [2022-07-13 10:10:40,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-13 10:10:40,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 135. [2022-07-13 10:10:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 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) [2022-07-13 10:10:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2022-07-13 10:10:40,865 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 126 [2022-07-13 10:10:40,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:40,865 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2022-07-13 10:10:40,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.389830508474576) internal successors, (200), 59 states have internal predecessors, (200), 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) [2022-07-13 10:10:40,865 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2022-07-13 10:10:40,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-13 10:10:40,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:40,866 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:40,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-13 10:10:41,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-13 10:10:41,066 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:41,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:41,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1055086952, now seen corresponding path program 41 times [2022-07-13 10:10:41,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:41,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111860584] [2022-07-13 10:10:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:41,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:41,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111860584] [2022-07-13 10:10:41,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111860584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335150643] [2022-07-13 10:10:41,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:10:41,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:41,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:41,878 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:41,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-13 10:10:42,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-13 10:10:42,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:42,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-13 10:10:42,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:42,357 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 15 treesize of output 11 [2022-07-13 10:10:42,395 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:10:42,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:10:42,440 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:10:42,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:10:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 2 proven. 1042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:43,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:43,434 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 16 treesize of output 14 [2022-07-13 10:10:43,436 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 24 [2022-07-13 10:10:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 1043 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:10:43,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335150643] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:43,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:43,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 41] total 60 [2022-07-13 10:10:43,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408505763] [2022-07-13 10:10:43,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:43,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-13 10:10:43,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:43,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-13 10:10:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3345, Unknown=0, NotChecked=0, Total=3540 [2022-07-13 10:10:43,559 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 60 states, 60 states have (on average 3.4166666666666665) internal successors, (205), 60 states have internal predecessors, (205), 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) [2022-07-13 10:10:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:45,682 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2022-07-13 10:10:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-13 10:10:45,683 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.4166666666666665) internal successors, (205), 60 states have internal predecessors, (205), 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 129 [2022-07-13 10:10:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:45,684 INFO L225 Difference]: With dead ends: 211 [2022-07-13 10:10:45,684 INFO L226 Difference]: Without dead ends: 209 [2022-07-13 10:10:45,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 231 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=446, Invalid=9256, Unknown=0, NotChecked=0, Total=9702 [2022-07-13 10:10:45,685 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 145 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 4070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 3906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:45,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1576 Invalid, 4070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 10:10:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-13 10:10:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 131. [2022-07-13 10:10:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 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) [2022-07-13 10:10:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-07-13 10:10:45,732 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 129 [2022-07-13 10:10:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:45,732 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-07-13 10:10:45,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.4166666666666665) internal successors, (205), 60 states have internal predecessors, (205), 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) [2022-07-13 10:10:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-07-13 10:10:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-13 10:10:45,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:45,733 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:45,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:45,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:45,941 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:45,941 INFO L85 PathProgramCache]: Analyzing trace with hash 772001481, now seen corresponding path program 42 times [2022-07-13 10:10:45,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:45,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136230822] [2022-07-13 10:10:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:45,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:46,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:46,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136230822] [2022-07-13 10:10:46,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136230822] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:46,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388354397] [2022-07-13 10:10:46,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:10:46,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:46,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:46,710 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:46,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-13 10:10:47,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-13 10:10:47,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:47,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 10:10:47,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:48,412 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 15 treesize of output 11 [2022-07-13 10:10:50,016 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:10:50,016 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 44 treesize of output 23 [2022-07-13 10:10:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 561 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:50,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:51,945 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 [2022-07-13 10:10:51,947 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 28 [2022-07-13 10:10:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 544 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:51,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388354397] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:51,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:51,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 102 [2022-07-13 10:10:51,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684564454] [2022-07-13 10:10:51,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:51,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-07-13 10:10:51,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-07-13 10:10:51,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=9168, Unknown=0, NotChecked=0, Total=10302 [2022-07-13 10:10:51,997 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 102 states, 102 states have (on average 3.235294117647059) internal successors, (330), 102 states have internal predecessors, (330), 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) [2022-07-13 10:10:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:55,286 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2022-07-13 10:10:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-13 10:10:55,287 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.235294117647059) internal successors, (330), 102 states have internal predecessors, (330), 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 130 [2022-07-13 10:10:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:55,287 INFO L225 Difference]: With dead ends: 210 [2022-07-13 10:10:55,287 INFO L226 Difference]: Without dead ends: 134 [2022-07-13 10:10:55,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5601 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2696, Invalid=27406, Unknown=0, NotChecked=0, Total=30102 [2022-07-13 10:10:55,289 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 116 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:55,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 996 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1155 Invalid, 0 Unknown, 469 Unchecked, 0.4s Time] [2022-07-13 10:10:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-13 10:10:55,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-07-13 10:10:55,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 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) [2022-07-13 10:10:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-07-13 10:10:55,338 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2022-07-13 10:10:55,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:55,338 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-07-13 10:10:55,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.235294117647059) internal successors, (330), 102 states have internal predecessors, (330), 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) [2022-07-13 10:10:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-07-13 10:10:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-13 10:10:55,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:55,339 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:55,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-07-13 10:10:55,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-13 10:10:55,539 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash 170627806, now seen corresponding path program 43 times [2022-07-13 10:10:55,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:55,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297215637] [2022-07-13 10:10:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:55,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:56,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:56,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297215637] [2022-07-13 10:10:56,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297215637] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:56,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399695730] [2022-07-13 10:10:56,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:10:56,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:56,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:56,398 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:56,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-13 10:10:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-13 10:10:56,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:56,659 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 15 treesize of output 11 [2022-07-13 10:10:56,720 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:10:56,720 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 27 treesize of output 26 [2022-07-13 10:10:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:57,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:57,760 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 16 treesize of output 14 [2022-07-13 10:10:57,762 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 24 [2022-07-13 10:10:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:57,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399695730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:57,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:57,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 42] total 62 [2022-07-13 10:10:57,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143853897] [2022-07-13 10:10:57,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:57,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-13 10:10:57,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:57,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-13 10:10:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3583, Unknown=0, NotChecked=0, Total=3782 [2022-07-13 10:10:57,875 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 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) [2022-07-13 10:10:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:59,978 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2022-07-13 10:10:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-13 10:10:59,978 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 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 133 [2022-07-13 10:10:59,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:59,979 INFO L225 Difference]: With dead ends: 213 [2022-07-13 10:10:59,979 INFO L226 Difference]: Without dead ends: 211 [2022-07-13 10:10:59,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 256 SyntacticMatches, 7 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=441, Invalid=9861, Unknown=0, NotChecked=0, Total=10302 [2022-07-13 10:10:59,979 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 130 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 3845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:59,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1746 Invalid, 3845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3656 Invalid, 0 Unknown, 106 Unchecked, 1.2s Time] [2022-07-13 10:10:59,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-13 10:11:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 142. [2022-07-13 10:11:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:11:00,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-07-13 10:11:00,030 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 133 [2022-07-13 10:11:00,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:00,030 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-07-13 10:11:00,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 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) [2022-07-13 10:11:00,030 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-07-13 10:11:00,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-13 10:11:00,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:00,031 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:00,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-13 10:11:00,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-13 10:11:00,235 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:00,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:00,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1043932503, now seen corresponding path program 44 times [2022-07-13 10:11:00,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:00,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072559583] [2022-07-13 10:11:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:00,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 0 proven. 1168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:01,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:01,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072559583] [2022-07-13 10:11:01,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072559583] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:01,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221562925] [2022-07-13 10:11:01,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:11:01,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:01,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:01,192 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:01,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-13 10:11:01,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:11:01,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:01,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-13 10:11:01,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:01,492 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 15 treesize of output 11 [2022-07-13 10:11:01,531 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:11:01,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:11:01,577 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:11:01,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:11:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 2 proven. 1166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:02,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:02,653 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 16 treesize of output 14 [2022-07-13 10:11:02,655 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 24 [2022-07-13 10:11:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 0 proven. 1167 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:11:02,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221562925] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:02,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:02,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 43] total 63 [2022-07-13 10:11:02,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142294799] [2022-07-13 10:11:02,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:02,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-13 10:11:02,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:02,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-13 10:11:02,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3701, Unknown=0, NotChecked=0, Total=3906 [2022-07-13 10:11:02,773 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 63 states, 63 states have (on average 3.4285714285714284) internal successors, (216), 63 states have internal predecessors, (216), 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) [2022-07-13 10:11:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:05,091 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2022-07-13 10:11:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-13 10:11:05,092 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.4285714285714284) internal successors, (216), 63 states have internal predecessors, (216), 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 136 [2022-07-13 10:11:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:05,093 INFO L225 Difference]: With dead ends: 222 [2022-07-13 10:11:05,093 INFO L226 Difference]: Without dead ends: 220 [2022-07-13 10:11:05,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 244 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=468, Invalid=10244, Unknown=0, NotChecked=0, Total=10712 [2022-07-13 10:11:05,094 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 118 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 4389 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 4535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 4389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:05,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1813 Invalid, 4535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 4389 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 10:11:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-13 10:11:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 138. [2022-07-13 10:11:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 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) [2022-07-13 10:11:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-07-13 10:11:05,148 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 136 [2022-07-13 10:11:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:05,148 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-07-13 10:11:05,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.4285714285714284) internal successors, (216), 63 states have internal predecessors, (216), 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) [2022-07-13 10:11:05,149 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-07-13 10:11:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-13 10:11:05,149 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:05,149 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:05,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:05,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:05,351 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:05,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:05,352 INFO L85 PathProgramCache]: Analyzing trace with hash 456008020, now seen corresponding path program 45 times [2022-07-13 10:11:05,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:05,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142603060] [2022-07-13 10:11:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:05,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:06,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:06,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142603060] [2022-07-13 10:11:06,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142603060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:06,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079616565] [2022-07-13 10:11:06,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:11:06,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:06,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:06,175 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:06,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-13 10:11:08,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-07-13 10:11:08,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:08,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-13 10:11:08,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:08,707 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 15 treesize of output 11 [2022-07-13 10:11:10,438 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:11:10,438 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 44 treesize of output 23 [2022-07-13 10:11:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 630 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:10,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:12,511 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 [2022-07-13 10:11:12,513 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 28 [2022-07-13 10:11:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 612 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:12,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079616565] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:12,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:12,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 107 [2022-07-13 10:11:12,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951172901] [2022-07-13 10:11:12,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:12,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-13 10:11:12,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:12,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-13 10:11:12,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=10100, Unknown=0, NotChecked=0, Total=11342 [2022-07-13 10:11:12,567 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 107 states, 107 states have (on average 3.2523364485981308) internal successors, (348), 107 states have internal predecessors, (348), 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) [2022-07-13 10:11:16,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:16,212 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2022-07-13 10:11:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-13 10:11:16,213 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.2523364485981308) internal successors, (348), 107 states have internal predecessors, (348), 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 137 [2022-07-13 10:11:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:16,213 INFO L225 Difference]: With dead ends: 221 [2022-07-13 10:11:16,214 INFO L226 Difference]: Without dead ends: 141 [2022-07-13 10:11:16,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6185 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2948, Invalid=30358, Unknown=0, NotChecked=0, Total=33306 [2022-07-13 10:11:16,216 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 78 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 454 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:16,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1161 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1172 Invalid, 0 Unknown, 454 Unchecked, 0.4s Time] [2022-07-13 10:11:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-13 10:11:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-07-13 10:11:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 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) [2022-07-13 10:11:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-07-13 10:11:16,273 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 137 [2022-07-13 10:11:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:16,273 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-07-13 10:11:16,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.2523364485981308) internal successors, (348), 107 states have internal predecessors, (348), 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) [2022-07-13 10:11:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-07-13 10:11:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-13 10:11:16,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:16,274 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:16,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-07-13 10:11:16,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-13 10:11:16,474 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:16,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:16,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2131063905, now seen corresponding path program 46 times [2022-07-13 10:11:16,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:16,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775471544] [2022-07-13 10:11:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:16,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:17,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:17,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775471544] [2022-07-13 10:11:17,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775471544] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:17,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629670602] [2022-07-13 10:11:17,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:11:17,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:17,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:17,392 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:17,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-13 10:11:17,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:11:17,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:17,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-13 10:11:17,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:17,662 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 15 treesize of output 11 [2022-07-13 10:11:17,725 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:11:17,726 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 27 treesize of output 26 [2022-07-13 10:11:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:18,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:18,851 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 16 treesize of output 14 [2022-07-13 10:11:18,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-13 10:11:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:18,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629670602] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:18,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:18,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 44] total 65 [2022-07-13 10:11:18,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518650866] [2022-07-13 10:11:18,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:18,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-13 10:11:18,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:18,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-13 10:11:18,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3951, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 10:11:18,968 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 states have internal predecessors, (222), 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) [2022-07-13 10:11:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:21,853 INFO L93 Difference]: Finished difference Result 238 states and 240 transitions. [2022-07-13 10:11:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-07-13 10:11:21,854 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 states have internal predecessors, (222), 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 140 [2022-07-13 10:11:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:21,854 INFO L225 Difference]: With dead ends: 238 [2022-07-13 10:11:21,854 INFO L226 Difference]: Without dead ends: 236 [2022-07-13 10:11:21,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 252 SyntacticMatches, 7 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3450 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=564, Invalid=14936, Unknown=0, NotChecked=0, Total=15500 [2022-07-13 10:11:21,855 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 164 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 4694 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 5014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 4694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:21,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 2168 Invalid, 5014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 4694 Invalid, 0 Unknown, 106 Unchecked, 1.6s Time] [2022-07-13 10:11:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-13 10:11:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 149. [2022-07-13 10:11:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:11:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2022-07-13 10:11:21,918 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 140 [2022-07-13 10:11:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:21,918 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2022-07-13 10:11:21,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 states have internal predecessors, (222), 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) [2022-07-13 10:11:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2022-07-13 10:11:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-13 10:11:21,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:21,919 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:21,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-07-13 10:11:22,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:22,123 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:22,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:22,124 INFO L85 PathProgramCache]: Analyzing trace with hash -402654860, now seen corresponding path program 47 times [2022-07-13 10:11:22,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:22,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840923105] [2022-07-13 10:11:22,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:22,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:23,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840923105] [2022-07-13 10:11:23,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840923105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844011941] [2022-07-13 10:11:23,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:11:23,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:23,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:23,051 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:23,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-13 10:11:23,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-13 10:11:23,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-13 10:11:23,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:23,798 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 15 treesize of output 11 [2022-07-13 10:11:23,838 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:11:23,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:11:23,885 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:11:23,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:11:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 2 proven. 1297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:24,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:25,055 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 16 treesize of output 14 [2022-07-13 10:11:25,056 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 24 [2022-07-13 10:11:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:11:25,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844011941] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:25,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:25,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 45] total 66 [2022-07-13 10:11:25,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991476160] [2022-07-13 10:11:25,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:25,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 10:11:25,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:25,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 10:11:25,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4075, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 10:11:25,185 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 66 states, 66 states have (on average 3.4393939393939394) internal successors, (227), 66 states have internal predecessors, (227), 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) [2022-07-13 10:11:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:27,868 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2022-07-13 10:11:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-13 10:11:27,868 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4393939393939394) internal successors, (227), 66 states have internal predecessors, (227), 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 143 [2022-07-13 10:11:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:27,869 INFO L225 Difference]: With dead ends: 233 [2022-07-13 10:11:27,869 INFO L226 Difference]: Without dead ends: 231 [2022-07-13 10:11:27,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 257 SyntacticMatches, 9 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=490, Invalid=11282, Unknown=0, NotChecked=0, Total=11772 [2022-07-13 10:11:27,875 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 123 mSDsluCounter, 1984 mSDsCounter, 0 mSdLazyCounter, 5113 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 5266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 5113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:27,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 2033 Invalid, 5266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 5113 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 10:11:27,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-13 10:11:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 145. [2022-07-13 10:11:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 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) [2022-07-13 10:11:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-07-13 10:11:27,967 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2022-07-13 10:11:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:27,967 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-07-13 10:11:27,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4393939393939394) internal successors, (227), 66 states have internal predecessors, (227), 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) [2022-07-13 10:11:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-07-13 10:11:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-13 10:11:27,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:27,968 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:27,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-13 10:11:28,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-13 10:11:28,174 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:28,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:28,174 INFO L85 PathProgramCache]: Analyzing trace with hash 744542613, now seen corresponding path program 48 times [2022-07-13 10:11:28,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:28,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561205611] [2022-07-13 10:11:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:28,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:29,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:29,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561205611] [2022-07-13 10:11:29,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561205611] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:29,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717768793] [2022-07-13 10:11:29,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:11:29,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:29,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:29,084 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:29,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-13 10:11:30,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-07-13 10:11:30,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:31,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-13 10:11:31,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:31,739 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 15 treesize of output 11 [2022-07-13 10:11:33,591 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:11:33,591 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 44 treesize of output 23 [2022-07-13 10:11:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 703 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:33,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:36,071 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 [2022-07-13 10:11:36,073 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 28 [2022-07-13 10:11:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 684 proven. 628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:36,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717768793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:36,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:36,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 112 [2022-07-13 10:11:36,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378919605] [2022-07-13 10:11:36,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:36,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-07-13 10:11:36,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:36,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-07-13 10:11:36,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=11076, Unknown=1, NotChecked=0, Total=12432 [2022-07-13 10:11:36,135 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 112 states, 112 states have (on average 3.267857142857143) internal successors, (366), 112 states have internal predecessors, (366), 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) [2022-07-13 10:11:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:39,270 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2022-07-13 10:11:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-13 10:11:39,270 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.267857142857143) internal successors, (366), 112 states have internal predecessors, (366), 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 144 [2022-07-13 10:11:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:39,271 INFO L225 Difference]: With dead ends: 232 [2022-07-13 10:11:39,271 INFO L226 Difference]: Without dead ends: 148 [2022-07-13 10:11:39,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5241 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2660, Invalid=27095, Unknown=1, NotChecked=0, Total=29756 [2022-07-13 10:11:39,272 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 131 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:39,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1206 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1412 Invalid, 0 Unknown, 248 Unchecked, 0.5s Time] [2022-07-13 10:11:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-13 10:11:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-07-13 10:11:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 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) [2022-07-13 10:11:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-07-13 10:11:39,333 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2022-07-13 10:11:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:39,333 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-07-13 10:11:39,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.267857142857143) internal successors, (366), 112 states have internal predecessors, (366), 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) [2022-07-13 10:11:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-07-13 10:11:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-13 10:11:39,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:39,334 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:39,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-13 10:11:39,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-13 10:11:39,535 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:39,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1801368342, now seen corresponding path program 49 times [2022-07-13 10:11:39,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:39,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689533049] [2022-07-13 10:11:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:39,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:40,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:40,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689533049] [2022-07-13 10:11:40,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689533049] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:40,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155392589] [2022-07-13 10:11:40,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:11:40,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:40,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:40,434 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:40,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-13 10:11:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:40,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-13 10:11:40,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:40,716 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 15 treesize of output 11 [2022-07-13 10:11:40,782 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:11:40,782 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 27 treesize of output 26 [2022-07-13 10:11:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:41,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:41,992 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 16 treesize of output 14 [2022-07-13 10:11:42,006 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 24 [2022-07-13 10:11:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:42,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155392589] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:42,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:42,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 46] total 68 [2022-07-13 10:11:42,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495152586] [2022-07-13 10:11:42,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:42,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-13 10:11:42,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-13 10:11:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=4337, Unknown=0, NotChecked=0, Total=4556 [2022-07-13 10:11:42,159 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 68 states, 68 states have (on average 3.426470588235294) internal successors, (233), 68 states have internal predecessors, (233), 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) [2022-07-13 10:11:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:45,262 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2022-07-13 10:11:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-07-13 10:11:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.426470588235294) internal successors, (233), 68 states have internal predecessors, (233), 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 147 [2022-07-13 10:11:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:45,263 INFO L225 Difference]: With dead ends: 249 [2022-07-13 10:11:45,264 INFO L226 Difference]: Without dead ends: 247 [2022-07-13 10:11:45,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 265 SyntacticMatches, 7 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3790 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=591, Invalid=16439, Unknown=0, NotChecked=0, Total=17030 [2022-07-13 10:11:45,265 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 184 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 5082 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 5313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 5082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:45,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 2206 Invalid, 5313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 5082 Invalid, 0 Unknown, 5 Unchecked, 1.7s Time] [2022-07-13 10:11:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-13 10:11:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 156. [2022-07-13 10:11:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 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) [2022-07-13 10:11:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2022-07-13 10:11:45,329 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 147 [2022-07-13 10:11:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:45,329 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2022-07-13 10:11:45,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.426470588235294) internal successors, (233), 68 states have internal predecessors, (233), 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) [2022-07-13 10:11:45,330 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2022-07-13 10:11:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-13 10:11:45,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:45,331 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:45,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:45,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:45,532 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:45,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2087818613, now seen corresponding path program 50 times [2022-07-13 10:11:45,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:45,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035344112] [2022-07-13 10:11:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:45,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 1437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:46,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:46,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035344112] [2022-07-13 10:11:46,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035344112] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:46,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971482404] [2022-07-13 10:11:46,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:11:46,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:46,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:46,465 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:46,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-13 10:11:46,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:11:46,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:46,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-13 10:11:46,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:46,763 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 15 treesize of output 11 [2022-07-13 10:11:46,804 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:11:46,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:11:46,918 INFO L356 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2022-07-13 10:11:46,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2022-07-13 10:11:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 2 proven. 1435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:48,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:49,284 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_2388| Int)) (or (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_2388| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 76 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (not (<= |v_ULTIMATE.start_main_~i~0#1_2388| 18))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_2388|)))) is different from false [2022-07-13 10:11:49,288 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 23 treesize of output 21 [2022-07-13 10:11:49,291 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 49 treesize of output 45 [2022-07-13 10:11:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 1416 refuted. 0 times theorem prover too weak. 0 trivial. 21 not checked. [2022-07-13 10:11:49,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971482404] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:49,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:49,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 75 [2022-07-13 10:11:49,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556862791] [2022-07-13 10:11:49,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:49,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-13 10:11:49,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:49,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-13 10:11:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=5123, Unknown=1, NotChecked=144, Total=5550 [2022-07-13 10:11:49,417 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 75 states, 75 states have (on average 3.28) internal successors, (246), 75 states have internal predecessors, (246), 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) [2022-07-13 10:11:50,935 WARN L833 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~i~0#1| 19) (<= 19 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_2388| Int)) (or (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_2388| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 76 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (not (<= |v_ULTIMATE.start_main_~i~0#1_2388| 18))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_2388|)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) is different from false [2022-07-13 10:11:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:51,122 INFO L93 Difference]: Finished difference Result 239 states and 241 transitions. [2022-07-13 10:11:51,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-13 10:11:51,123 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.28) internal successors, (246), 75 states have internal predecessors, (246), 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 150 [2022-07-13 10:11:51,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:51,123 INFO L225 Difference]: With dead ends: 239 [2022-07-13 10:11:51,123 INFO L226 Difference]: Without dead ends: 237 [2022-07-13 10:11:51,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 267 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=360, Invalid=8202, Unknown=2, NotChecked=366, Total=8930 [2022-07-13 10:11:51,124 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 121 mSDsluCounter, 1941 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:51,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 1988 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2472 Invalid, 0 Unknown, 432 Unchecked, 0.8s Time] [2022-07-13 10:11:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-13 10:11:51,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 152. [2022-07-13 10:11:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 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) [2022-07-13 10:11:51,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-07-13 10:11:51,200 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 150 [2022-07-13 10:11:51,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:51,200 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-07-13 10:11:51,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.28) internal successors, (246), 75 states have internal predecessors, (246), 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) [2022-07-13 10:11:51,200 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-07-13 10:11:51,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-13 10:11:51,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:51,201 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:51,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-07-13 10:11:51,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:51,401 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:51,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1595935392, now seen corresponding path program 51 times [2022-07-13 10:11:51,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:51,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155925498] [2022-07-13 10:11:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:51,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:52,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:52,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155925498] [2022-07-13 10:11:52,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155925498] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:52,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581384308] [2022-07-13 10:11:52,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:11:52,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:52,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:52,342 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:52,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-13 10:11:54,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-07-13 10:11:54,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:54,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-13 10:11:55,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:55,803 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 15 treesize of output 11 [2022-07-13 10:11:57,820 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 10:11:57,820 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 44 treesize of output 23 [2022-07-13 10:11:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 780 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:11:57,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:12:00,305 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 [2022-07-13 10:12:00,307 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 28 [2022-07-13 10:12:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 760 proven. 691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:12:00,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581384308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:12:00,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:12:00,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 117 [2022-07-13 10:12:00,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892744514] [2022-07-13 10:12:00,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:12:00,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-07-13 10:12:00,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:12:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-07-13 10:12:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1473, Invalid=12099, Unknown=0, NotChecked=0, Total=13572 [2022-07-13 10:12:00,365 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 117 states, 117 states have (on average 3.282051282051282) internal successors, (384), 117 states have internal predecessors, (384), 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) [2022-07-13 10:12:03,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:12:03,814 INFO L93 Difference]: Finished difference Result 243 states and 245 transitions. [2022-07-13 10:12:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-13 10:12:03,815 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.282051282051282) internal successors, (384), 117 states have internal predecessors, (384), 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 151 [2022-07-13 10:12:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:12:03,815 INFO L225 Difference]: With dead ends: 243 [2022-07-13 10:12:03,815 INFO L226 Difference]: Without dead ends: 155 [2022-07-13 10:12:03,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5721 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2885, Invalid=29695, Unknown=0, NotChecked=0, Total=32580 [2022-07-13 10:12:03,817 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 117 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 10:12:03,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1627 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1617 Invalid, 0 Unknown, 335 Unchecked, 0.6s Time] [2022-07-13 10:12:03,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-13 10:12:03,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-07-13 10:12:03,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 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) [2022-07-13 10:12:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-07-13 10:12:03,915 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 151 [2022-07-13 10:12:03,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:12:03,915 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-07-13 10:12:03,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.282051282051282) internal successors, (384), 117 states have internal predecessors, (384), 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) [2022-07-13 10:12:03,916 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-07-13 10:12:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-13 10:12:03,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:12:03,917 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:12:03,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-13 10:12:04,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:12:04,139 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:12:04,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:12:04,140 INFO L85 PathProgramCache]: Analyzing trace with hash 519241835, now seen corresponding path program 52 times [2022-07-13 10:12:04,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:12:04,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951489069] [2022-07-13 10:12:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:12:04,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:12:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:12:05,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:12:05,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951489069] [2022-07-13 10:12:05,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951489069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:12:05,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080011231] [2022-07-13 10:12:05,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:12:05,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:12:05,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:12:05,117 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:12:05,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-13 10:12:05,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:12:05,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:12:05,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-13 10:12:05,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:12:05,439 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 15 treesize of output 11 [2022-07-13 10:12:05,507 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 10:12:05,507 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 27 treesize of output 26 [2022-07-13 10:12:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:12:06,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:12:06,840 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 16 treesize of output 14 [2022-07-13 10:12:06,843 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 24 [2022-07-13 10:12:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:12:06,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080011231] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:12:06,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:12:06,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 48] total 71 [2022-07-13 10:12:06,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715841070] [2022-07-13 10:12:06,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:12:06,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-13 10:12:06,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:12:06,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-13 10:12:06,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=4741, Unknown=0, NotChecked=0, Total=4970 [2022-07-13 10:12:06,976 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 71 states, 71 states have (on average 3.436619718309859) internal successors, (244), 71 states have internal predecessors, (244), 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) [2022-07-13 10:12:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:12:10,451 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2022-07-13 10:12:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-07-13 10:12:10,451 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.436619718309859) internal successors, (244), 71 states have internal predecessors, (244), 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 154 [2022-07-13 10:12:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:12:10,452 INFO L225 Difference]: With dead ends: 260 [2022-07-13 10:12:10,452 INFO L226 Difference]: Without dead ends: 258 [2022-07-13 10:12:10,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 278 SyntacticMatches, 7 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=618, Invalid=18014, Unknown=0, NotChecked=0, Total=18632 [2022-07-13 10:12:10,453 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 194 mSDsluCounter, 2387 mSDsCounter, 0 mSdLazyCounter, 5648 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 2439 SdHoareTripleChecker+Invalid, 5891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 5648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 10:12:10,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 2439 Invalid, 5891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 5648 Invalid, 0 Unknown, 5 Unchecked, 1.9s Time] [2022-07-13 10:12:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-13 10:12:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 163. [2022-07-13 10:12:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 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) [2022-07-13 10:12:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2022-07-13 10:12:10,539 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 154 [2022-07-13 10:12:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:12:10,540 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2022-07-13 10:12:10,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.436619718309859) internal successors, (244), 71 states have internal predecessors, (244), 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) [2022-07-13 10:12:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2022-07-13 10:12:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 10:12:10,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:12:10,541 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:12:10,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-13 10:12:10,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-13 10:12:10,755 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:12:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:12:10,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1996155520, now seen corresponding path program 53 times [2022-07-13 10:12:10,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:12:10,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482160754] [2022-07-13 10:12:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:12:10,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:12:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:12:11,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:12:11,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482160754] [2022-07-13 10:12:11,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482160754] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:12:11,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95333170] [2022-07-13 10:12:11,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:12:11,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:12:11,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:12:11,834 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:12:11,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-13 10:12:14,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-13 10:12:14,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:12:14,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-13 10:12:14,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:12:14,281 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 15 treesize of output 11 [2022-07-13 10:12:14,323 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:12:14,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-13 10:12:14,372 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:12:14,373 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 25 treesize of output 24 [2022-07-13 10:12:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 2 proven. 1580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:12:15,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:12:15,727 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 16 treesize of output 14 [2022-07-13 10:12:15,729 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 24 [2022-07-13 10:12:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1581 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:12:15,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95333170] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:12:15,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:12:15,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 49] total 72 [2022-07-13 10:12:15,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447679696] [2022-07-13 10:12:15,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:12:15,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-13 10:12:15,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:12:15,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-13 10:12:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=4877, Unknown=0, NotChecked=0, Total=5112 [2022-07-13 10:12:15,866 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 72 states, 72 states have (on average 3.4583333333333335) internal successors, (249), 72 states have internal predecessors, (249), 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) [2022-07-13 10:12:19,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:12:19,085 INFO L93 Difference]: Finished difference Result 255 states and 257 transitions. [2022-07-13 10:12:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-13 10:12:19,085 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.4583333333333335) internal successors, (249), 72 states have internal predecessors, (249), 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 157 [2022-07-13 10:12:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:12:19,086 INFO L225 Difference]: With dead ends: 255 [2022-07-13 10:12:19,086 INFO L226 Difference]: Without dead ends: 253 [2022-07-13 10:12:19,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 283 SyntacticMatches, 9 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=534, Invalid=13508, Unknown=0, NotChecked=0, Total=14042 [2022-07-13 10:12:19,087 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 168 mSDsluCounter, 2492 mSDsCounter, 0 mSdLazyCounter, 6282 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 6481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 6282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:12:19,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 2545 Invalid, 6481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 6282 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 10:12:19,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-13 10:12:19,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 159. [2022-07-13 10:12:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 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) [2022-07-13 10:12:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-07-13 10:12:19,164 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 157 [2022-07-13 10:12:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:12:19,165 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-07-13 10:12:19,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.4583333333333335) internal successors, (249), 72 states have internal predecessors, (249), 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) [2022-07-13 10:12:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-07-13 10:12:19,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-13 10:12:19,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:12:19,166 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:12:19,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-07-13 10:12:19,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-13 10:12:19,375 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:12:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:12:19,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2084175969, now seen corresponding path program 54 times [2022-07-13 10:12:19,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:12:19,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934755750] [2022-07-13 10:12:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:12:19,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:12:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:12:20,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:12:20,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934755750] [2022-07-13 10:12:20,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934755750] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:12:20,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595996400] [2022-07-13 10:12:20,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:12:20,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:12:20,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:12:20,385 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:12:20,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-13 10:12:22,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-07-13 10:12:22,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:12:22,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-13 10:12:22,689 INFO L286 TraceCheckSpWp]: Computing forward predicates...