./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mlceu.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/mlceu.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 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:45:47,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:45:47,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:45:47,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:45:47,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:45:47,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:45:47,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:45:47,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:45:47,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:45:47,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:45:47,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:45:47,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:45:47,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:45:47,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:45:47,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:45:47,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:45:47,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:45:47,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:45:47,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:45:47,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:45:47,332 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:45:47,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:45:47,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:45:47,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:45:47,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:45:47,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:45:47,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:45:47,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:45:47,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:45:47,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:45:47,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:45:47,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:45:47,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:45:47,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:45:47,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:45:47,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:45:47,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:45:47,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:45:47,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:45:47,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:45:47,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:45:47,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:45:47,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:45:47,367 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:45:47,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:45:47,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:45:47,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:45:47,369 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:45:47,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:45:47,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:45:47,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:45:47,370 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:45:47,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:45:47,371 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:45:47,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:45:47,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:45:47,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:45:47,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:45:47,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:45:47,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:45:47,372 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:45:47,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:45:47,373 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:45:47,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:45:47,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:45:47,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:45:47,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:45:47,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:45:47,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:45:47,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:45:47,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:45:47,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:45:47,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:45:47,376 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:45:47,376 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:45:47,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:45:47,376 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 [2022-07-22 09:45:47,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:45:47,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:45:47,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:45:47,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:45:47,602 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:45:47,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mlceu.c [2022-07-22 09:45:47,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad9674da/6680a25457a2421e866a5c5102cb342a/FLAG617c6ec62 [2022-07-22 09:45:48,038 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:45:48,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu.c [2022-07-22 09:45:48,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad9674da/6680a25457a2421e866a5c5102cb342a/FLAG617c6ec62 [2022-07-22 09:45:48,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad9674da/6680a25457a2421e866a5c5102cb342a [2022-07-22 09:45:48,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:45:48,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:45:48,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:45:48,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:45:48,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:45:48,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:45:48" (1/1) ... [2022-07-22 09:45:48,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55eddb58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48, skipping insertion in model container [2022-07-22 09:45:48,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:45:48" (1/1) ... [2022-07-22 09:45:48,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:45:48,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:45:48,653 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/mlceu.c[396,409] [2022-07-22 09:45:48,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:45:48,684 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:45:48,697 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/mlceu.c[396,409] [2022-07-22 09:45:48,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:45:48,729 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:45:48,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48 WrapperNode [2022-07-22 09:45:48,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:45:48,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:45:48,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:45:48,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:45:48,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48" (1/1) ... [2022-07-22 09:45:48,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48" (1/1) ... [2022-07-22 09:45:48,764 INFO L137 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2022-07-22 09:45:48,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:45:48,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:45:48,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:45:48,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:45:48,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48" (1/1) ... [2022-07-22 09:45:48,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48" (1/1) ... [2022-07-22 09:45:48,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48" (1/1) ... [2022-07-22 09:45:48,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48" (1/1) ... [2022-07-22 09:45:48,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48" (1/1) ... [2022-07-22 09:45:48,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48" (1/1) ... [2022-07-22 09:45:48,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48" (1/1) ... [2022-07-22 09:45:48,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:45:48,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:45:48,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:45:48,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:45:48,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48" (1/1) ... [2022-07-22 09:45:48,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:45:48,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:48,839 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) [2022-07-22 09:45:48,841 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 [2022-07-22 09:45:48,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:45:48,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:45:48,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:45:48,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 09:45:48,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:45:48,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:45:48,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:45:48,931 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:45:48,932 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:45:49,023 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:45:49,030 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:45:49,031 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 09:45:49,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:45:49 BoogieIcfgContainer [2022-07-22 09:45:49,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:45:49,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:45:49,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:45:49,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:45:49,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:45:48" (1/3) ... [2022-07-22 09:45:49,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea86cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:45:49, skipping insertion in model container [2022-07-22 09:45:49,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:48" (2/3) ... [2022-07-22 09:45:49,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea86cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:45:49, skipping insertion in model container [2022-07-22 09:45:49,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:45:49" (3/3) ... [2022-07-22 09:45:49,041 INFO L111 eAbstractionObserver]: Analyzing ICFG mlceu.c [2022-07-22 09:45:49,052 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:45:49,052 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:45:49,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:45:49,101 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@6b51ca42, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7a6f314 [2022-07-22 09:45:49,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:45:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) [2022-07-22 09:45:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 09:45:49,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:49,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:49,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:49,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1096717866, now seen corresponding path program 1 times [2022-07-22 09:45:49,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:49,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113307011] [2022-07-22 09:45:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:49,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:49,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:49,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113307011] [2022-07-22 09:45:49,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113307011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:45:49,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:45:49,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 09:45:49,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151799681] [2022-07-22 09:45:49,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:45:49,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 09:45:49,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 09:45:49,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:45:49,296 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:49,316 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-07-22 09:45:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 09:45:49,318 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 09:45:49,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:49,325 INFO L225 Difference]: With dead ends: 34 [2022-07-22 09:45:49,326 INFO L226 Difference]: Without dead ends: 15 [2022-07-22 09:45:49,333 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 [2022-07-22 09:45:49,339 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2022-07-22 09:45:49,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:45:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-22 09:45:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-22 09:45:49,366 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) [2022-07-22 09:45:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-22 09:45:49,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2022-07-22 09:45:49,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:49,368 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-22 09:45:49,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:49,369 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-22 09:45:49,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 09:45:49,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:49,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:49,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:45:49,370 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:49,371 INFO L85 PathProgramCache]: Analyzing trace with hash 678289496, now seen corresponding path program 1 times [2022-07-22 09:45:49,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:49,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925297655] [2022-07-22 09:45:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:49,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:49,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:49,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925297655] [2022-07-22 09:45:49,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925297655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:45:49,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:45:49,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 09:45:49,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733120268] [2022-07-22 09:45:49,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:45:49,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:45:49,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:49,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:45:49,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:45:49,472 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:49,509 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-07-22 09:45:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 09:45:49,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 09:45:49,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:49,511 INFO L225 Difference]: With dead ends: 34 [2022-07-22 09:45:49,511 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 09:45:49,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:45:49,513 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:49,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:45:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 09:45:49,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2022-07-22 09:45:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-22 09:45:49,518 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2022-07-22 09:45:49,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:49,518 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-22 09:45:49,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-22 09:45:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 09:45:49,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:49,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:49,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 09:45:49,520 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:49,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:49,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1190752748, now seen corresponding path program 1 times [2022-07-22 09:45:49,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:49,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193577055] [2022-07-22 09:45:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:49,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:49,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:49,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193577055] [2022-07-22 09:45:49,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193577055] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:49,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79385704] [2022-07-22 09:45:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:49,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:49,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:49,760 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) [2022-07-22 09:45:49,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:45:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:49,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 09:45:49,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:49,910 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 18 treesize of output 14 [2022-07-22 09:45:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:49,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:50,059 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 14 treesize of output 12 [2022-07-22 09:45:50,066 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 22 treesize of output 20 [2022-07-22 09:45:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:50,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79385704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:50,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:50,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-22 09:45:50,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304828857] [2022-07-22 09:45:50,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:50,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 09:45:50,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:50,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 09:45:50,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-22 09:45:50,098 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:50,223 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-07-22 09:45:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 09:45:50,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 13 [2022-07-22 09:45:50,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:50,225 INFO L225 Difference]: With dead ends: 26 [2022-07-22 09:45:50,225 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 09:45:50,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-07-22 09:45:50,227 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:50,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 46 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:45:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 09:45:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2022-07-22 09:45:50,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-22 09:45:50,232 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2022-07-22 09:45:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:50,233 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-22 09:45:50,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-22 09:45:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 09:45:50,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:50,234 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:50,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 09:45:50,458 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 [2022-07-22 09:45:50,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:50,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:50,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1891500962, now seen corresponding path program 1 times [2022-07-22 09:45:50,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:50,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126980841] [2022-07-22 09:45:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:50,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:50,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:50,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126980841] [2022-07-22 09:45:50,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126980841] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:50,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887888297] [2022-07-22 09:45:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:50,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:50,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:50,580 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) [2022-07-22 09:45:50,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:45:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:50,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 09:45:50,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:50,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:50,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887888297] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:50,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:50,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-22 09:45:50,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636591840] [2022-07-22 09:45:50,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:50,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 09:45:50,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 09:45:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-22 09:45:50,729 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:50,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:50,793 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-07-22 09:45:50,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 09:45:50,794 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-22 09:45:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:50,795 INFO L225 Difference]: With dead ends: 49 [2022-07-22 09:45:50,795 INFO L226 Difference]: Without dead ends: 31 [2022-07-22 09:45:50,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:45:50,798 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:50,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 45 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:45:50,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-22 09:45:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-07-22 09:45:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-22 09:45:50,804 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-07-22 09:45:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:50,804 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-22 09:45:50,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-22 09:45:50,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 09:45:50,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:50,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:50,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:45:51,031 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 [2022-07-22 09:45:51,031 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:51,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:51,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2006236274, now seen corresponding path program 2 times [2022-07-22 09:45:51,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:51,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150135357] [2022-07-22 09:45:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:51,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:51,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:51,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150135357] [2022-07-22 09:45:51,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150135357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:51,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677166250] [2022-07-22 09:45:51,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:45:51,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:51,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:51,225 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) [2022-07-22 09:45:51,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:45:51,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:45:51,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:45:51,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 09:45:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:51,289 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 [2022-07-22 09:45:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:51,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:51,410 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 [2022-07-22 09:45:51,413 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 [2022-07-22 09:45:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:51,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677166250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:51,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:51,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-07-22 09:45:51,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539307006] [2022-07-22 09:45:51,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:51,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 09:45:51,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:51,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 09:45:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-22 09:45:51,431 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2022-07-22 09:45:51,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:51,587 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-07-22 09:45:51,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 09:45:51,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) Word has length 20 [2022-07-22 09:45:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:51,590 INFO L225 Difference]: With dead ends: 33 [2022-07-22 09:45:51,590 INFO L226 Difference]: Without dead ends: 31 [2022-07-22 09:45:51,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-22 09:45:51,593 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:51,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:45:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-22 09:45:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-07-22 09:45:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-07-22 09:45:51,606 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2022-07-22 09:45:51,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:51,607 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-07-22 09:45:51,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2022-07-22 09:45:51,607 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-07-22 09:45:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 09:45:51,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:51,608 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:51,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:45:51,827 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 [2022-07-22 09:45:51,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash 466236484, now seen corresponding path program 3 times [2022-07-22 09:45:51,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:51,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763870313] [2022-07-22 09:45:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:51,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:51,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:51,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763870313] [2022-07-22 09:45:51,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763870313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:51,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601645434] [2022-07-22 09:45:51,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:45:51,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:51,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:51,933 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) [2022-07-22 09:45:51,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:45:51,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 09:45:51,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:45:51,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 09:45:51,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:52,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:52,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601645434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:52,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:52,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-22 09:45:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912647741] [2022-07-22 09:45:52,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:52,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 09:45:52,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 09:45:52,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-22 09:45:52,105 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:52,190 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-07-22 09:45:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 09:45:52,191 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 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 24 [2022-07-22 09:45:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:52,192 INFO L225 Difference]: With dead ends: 64 [2022-07-22 09:45:52,192 INFO L226 Difference]: Without dead ends: 38 [2022-07-22 09:45:52,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-22 09:45:52,194 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:52,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 57 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:45:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-22 09:45:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-07-22 09:45:52,201 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) [2022-07-22 09:45:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-07-22 09:45:52,202 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2022-07-22 09:45:52,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:52,202 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-07-22 09:45:52,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-07-22 09:45:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 09:45:52,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:52,204 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:52,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 09:45:52,415 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 [2022-07-22 09:45:52,416 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:52,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1524796712, now seen corresponding path program 4 times [2022-07-22 09:45:52,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:52,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566002417] [2022-07-22 09:45:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:52,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:52,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:52,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566002417] [2022-07-22 09:45:52,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566002417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:52,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701311003] [2022-07-22 09:45:52,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:45:52,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:52,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:52,617 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) [2022-07-22 09:45:52,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:45:52,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:45:52,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:45:52,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 09:45:52,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:52,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 09:45:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:52,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:52,874 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 [2022-07-22 09:45:52,876 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 [2022-07-22 09:45:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:52,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701311003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:52,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:52,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-22 09:45:52,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540811125] [2022-07-22 09:45:52,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:52,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 09:45:52,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 09:45:52,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-07-22 09:45:52,903 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:53,136 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-07-22 09:45:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 09:45:53,137 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 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 27 [2022-07-22 09:45:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:53,137 INFO L225 Difference]: With dead ends: 40 [2022-07-22 09:45:53,137 INFO L226 Difference]: Without dead ends: 38 [2022-07-22 09:45:53,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-07-22 09:45:53,138 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:53,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 101 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:45:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-22 09:45:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-07-22 09:45:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-07-22 09:45:53,142 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2022-07-22 09:45:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:53,143 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-07-22 09:45:53,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:53,143 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-07-22 09:45:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 09:45:53,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:53,143 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:53,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:45:53,344 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 [2022-07-22 09:45:53,344 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:53,345 INFO L85 PathProgramCache]: Analyzing trace with hash 702525070, now seen corresponding path program 5 times [2022-07-22 09:45:53,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:53,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204307051] [2022-07-22 09:45:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:53,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:53,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:53,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204307051] [2022-07-22 09:45:53,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204307051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:53,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521176488] [2022-07-22 09:45:53,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:45:53,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:53,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:53,452 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) [2022-07-22 09:45:53,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:45:53,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 09:45:53,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:45:53,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 09:45:53,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:53,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:53,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521176488] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:53,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:53,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-22 09:45:53,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855622391] [2022-07-22 09:45:53,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:53,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 09:45:53,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:53,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 09:45:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-22 09:45:53,653 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:53,748 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-07-22 09:45:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 09:45:53,749 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-22 09:45:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:53,750 INFO L225 Difference]: With dead ends: 79 [2022-07-22 09:45:53,750 INFO L226 Difference]: Without dead ends: 45 [2022-07-22 09:45:53,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-22 09:45:53,751 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:53,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 63 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:45:53,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-22 09:45:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-07-22 09:45:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-07-22 09:45:53,756 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2022-07-22 09:45:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:53,756 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-07-22 09:45:53,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-07-22 09:45:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 09:45:53,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:53,758 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:53,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 09:45:53,971 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 [2022-07-22 09:45:53,971 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:53,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1539792518, now seen corresponding path program 6 times [2022-07-22 09:45:53,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:53,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805012141] [2022-07-22 09:45:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:53,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:54,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:54,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805012141] [2022-07-22 09:45:54,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805012141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:54,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335238565] [2022-07-22 09:45:54,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:45:54,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:54,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:54,197 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) [2022-07-22 09:45:54,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 09:45:54,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-22 09:45:54,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:45:54,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 09:45:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:54,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 09:45:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:54,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:54,561 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 [2022-07-22 09:45:54,570 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 [2022-07-22 09:45:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:54,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335238565] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:54,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:54,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-07-22 09:45:54,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764471649] [2022-07-22 09:45:54,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:54,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 09:45:54,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:54,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 09:45:54,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-07-22 09:45:54,616 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:54,955 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-07-22 09:45:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 09:45:54,955 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-22 09:45:54,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:54,956 INFO L225 Difference]: With dead ends: 47 [2022-07-22 09:45:54,956 INFO L226 Difference]: Without dead ends: 45 [2022-07-22 09:45:54,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 09:45:54,958 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:54,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 146 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:45:54,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-22 09:45:54,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-07-22 09:45:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-07-22 09:45:54,963 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 34 [2022-07-22 09:45:54,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:54,963 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-07-22 09:45:54,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-07-22 09:45:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 09:45:54,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:54,964 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:54,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 09:45:55,165 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 [2022-07-22 09:45:55,165 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:55,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:55,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1264665552, now seen corresponding path program 7 times [2022-07-22 09:45:55,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:55,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268795376] [2022-07-22 09:45:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:55,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:55,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:55,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268795376] [2022-07-22 09:45:55,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268795376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:55,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199606649] [2022-07-22 09:45:55,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:45:55,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:55,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:55,259 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) [2022-07-22 09:45:55,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 09:45:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:55,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 09:45:55,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:55,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:55,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199606649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:55,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:55,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-22 09:45:55,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696169731] [2022-07-22 09:45:55,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:55,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 09:45:55,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:55,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 09:45:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:45:55,498 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:55,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:55,621 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2022-07-22 09:45:55,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 09:45:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 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 38 [2022-07-22 09:45:55,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:55,622 INFO L225 Difference]: With dead ends: 94 [2022-07-22 09:45:55,622 INFO L226 Difference]: Without dead ends: 52 [2022-07-22 09:45:55,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:45:55,624 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:55,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 106 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:45:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-22 09:45:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2022-07-22 09:45:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-07-22 09:45:55,629 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2022-07-22 09:45:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:55,629 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-07-22 09:45:55,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-07-22 09:45:55,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 09:45:55,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:55,630 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:55,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 09:45:55,851 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 [2022-07-22 09:45:55,852 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:55,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash 122087364, now seen corresponding path program 8 times [2022-07-22 09:45:55,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:55,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587738179] [2022-07-22 09:45:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:55,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:56,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:56,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587738179] [2022-07-22 09:45:56,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587738179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:56,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82485184] [2022-07-22 09:45:56,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:45:56,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:56,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:56,030 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) [2022-07-22 09:45:56,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 09:45:56,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:45:56,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:45:56,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 09:45:56,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:56,127 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 [2022-07-22 09:45:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:56,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:56,339 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 [2022-07-22 09:45:56,341 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 [2022-07-22 09:45:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:56,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82485184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:56,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:56,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 20 [2022-07-22 09:45:56,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475863728] [2022-07-22 09:45:56,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:56,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 09:45:56,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:56,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 09:45:56,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:45:56,377 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:56,706 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-07-22 09:45:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 09:45:56,706 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 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 41 [2022-07-22 09:45:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:56,707 INFO L225 Difference]: With dead ends: 54 [2022-07-22 09:45:56,707 INFO L226 Difference]: Without dead ends: 52 [2022-07-22 09:45:56,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 09:45:56,708 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:56,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 183 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:45:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-22 09:45:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-07-22 09:45:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-07-22 09:45:56,713 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2022-07-22 09:45:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:56,713 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-07-22 09:45:56,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-07-22 09:45:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 09:45:56,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:56,714 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:56,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 09:45:56,914 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 [2022-07-22 09:45:56,914 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:56,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:56,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1087582854, now seen corresponding path program 9 times [2022-07-22 09:45:56,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:56,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692357103] [2022-07-22 09:45:56,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:56,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:57,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:57,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692357103] [2022-07-22 09:45:57,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692357103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:57,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344482819] [2022-07-22 09:45:57,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:45:57,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:57,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:57,021 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) [2022-07-22 09:45:57,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 09:45:57,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 09:45:57,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:45:57,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 09:45:57,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:57,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:57,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344482819] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:57,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:57,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-22 09:45:57,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521603974] [2022-07-22 09:45:57,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:57,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 09:45:57,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 09:45:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:45:57,341 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:57,470 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2022-07-22 09:45:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 09:45:57,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 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 45 [2022-07-22 09:45:57,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:57,471 INFO L225 Difference]: With dead ends: 109 [2022-07-22 09:45:57,471 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 09:45:57,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-22 09:45:57,472 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:57,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 106 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:45:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 09:45:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2022-07-22 09:45:57,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 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) [2022-07-22 09:45:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-07-22 09:45:57,477 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2022-07-22 09:45:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:57,477 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-07-22 09:45:57,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-07-22 09:45:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 09:45:57,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:57,478 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:57,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 09:45:57,678 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 [2022-07-22 09:45:57,679 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:57,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2143538330, now seen corresponding path program 10 times [2022-07-22 09:45:57,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:57,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402226732] [2022-07-22 09:45:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:57,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:57,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:57,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402226732] [2022-07-22 09:45:57,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402226732] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:57,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107825771] [2022-07-22 09:45:57,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:45:57,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:57,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:57,890 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) [2022-07-22 09:45:57,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 09:45:57,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:45:57,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:45:57,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 09:45:57,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:57,988 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 [2022-07-22 09:45:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:58,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:58,214 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 [2022-07-22 09:45:58,216 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 [2022-07-22 09:45:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:58,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107825771] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:58,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:58,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 23 [2022-07-22 09:45:58,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578977813] [2022-07-22 09:45:58,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:58,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 09:45:58,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:58,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 09:45:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:45:58,255 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:58,671 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2022-07-22 09:45:58,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 09:45:58,671 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 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 48 [2022-07-22 09:45:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:58,672 INFO L225 Difference]: With dead ends: 61 [2022-07-22 09:45:58,672 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 09:45:58,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 09:45:58,673 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:58,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 240 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:45:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 09:45:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2022-07-22 09:45:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-07-22 09:45:58,679 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2022-07-22 09:45:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:58,679 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-07-22 09:45:58,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-07-22 09:45:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 09:45:58,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:58,680 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:58,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 09:45:58,892 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 [2022-07-22 09:45:58,893 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash -546342884, now seen corresponding path program 11 times [2022-07-22 09:45:58,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:58,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019076948] [2022-07-22 09:45:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:58,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:59,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:59,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019076948] [2022-07-22 09:45:59,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019076948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:59,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831596453] [2022-07-22 09:45:59,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:45:59,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:59,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:59,027 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) [2022-07-22 09:45:59,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 09:45:59,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-22 09:45:59,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:45:59,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 09:45:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:45:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:59,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:45:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:59,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831596453] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:45:59,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:45:59,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-22 09:45:59,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573215436] [2022-07-22 09:45:59,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:45:59,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 09:45:59,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:45:59,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 09:45:59,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-22 09:45:59,406 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:45:59,543 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2022-07-22 09:45:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 09:45:59,544 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 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 52 [2022-07-22 09:45:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:45:59,544 INFO L225 Difference]: With dead ends: 124 [2022-07-22 09:45:59,544 INFO L226 Difference]: Without dead ends: 66 [2022-07-22 09:45:59,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 09:45:59,546 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 135 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:45:59,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 124 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:45:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-22 09:45:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-07-22 09:45:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-07-22 09:45:59,550 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2022-07-22 09:45:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:45:59,550 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-07-22 09:45:59,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:45:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-07-22 09:45:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 09:45:59,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:45:59,551 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:45:59,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 09:45:59,751 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 [2022-07-22 09:45:59,751 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:45:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:45:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash 969527472, now seen corresponding path program 12 times [2022-07-22 09:45:59,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:45:59,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640879626] [2022-07-22 09:45:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:45:59,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:45:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:45:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:45:59,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:45:59,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640879626] [2022-07-22 09:45:59,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640879626] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:45:59,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764415833] [2022-07-22 09:45:59,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:45:59,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:45:59,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:45:59,964 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) [2022-07-22 09:45:59,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 09:46:00,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-22 09:46:00,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:00,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 09:46:00,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:00,333 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 [2022-07-22 09:46:00,858 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:00,859 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 [2022-07-22 09:46:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:00,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:01,489 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 [2022-07-22 09:46:01,491 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 [2022-07-22 09:46:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:01,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764415833] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:01,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:01,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 47 [2022-07-22 09:46:01,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283743575] [2022-07-22 09:46:01,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:01,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 09:46:01,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:01,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 09:46:01,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 09:46:01,522 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 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) [2022-07-22 09:46:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:02,324 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2022-07-22 09:46:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 09:46:02,325 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 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 55 [2022-07-22 09:46:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:02,325 INFO L225 Difference]: With dead ends: 92 [2022-07-22 09:46:02,325 INFO L226 Difference]: Without dead ends: 60 [2022-07-22 09:46:02,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=671, Invalid=5029, Unknown=0, NotChecked=0, Total=5700 [2022-07-22 09:46:02,327 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:02,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 304 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 269 Invalid, 0 Unknown, 166 Unchecked, 0.1s Time] [2022-07-22 09:46:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-22 09:46:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-07-22 09:46:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 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) [2022-07-22 09:46:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-07-22 09:46:02,333 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2022-07-22 09:46:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:02,334 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-07-22 09:46:02,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 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) [2022-07-22 09:46:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-07-22 09:46:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 09:46:02,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:02,335 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:02,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:02,535 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 [2022-07-22 09:46:02,535 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:02,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:02,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2019414246, now seen corresponding path program 1 times [2022-07-22 09:46:02,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:02,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647072082] [2022-07-22 09:46:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:02,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 09:46:02,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:02,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647072082] [2022-07-22 09:46:02,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647072082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:02,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702714474] [2022-07-22 09:46:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:02,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:02,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:02,626 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) [2022-07-22 09:46:02,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 09:46:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:02,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 09:46:02,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 09:46:02,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 09:46:02,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702714474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:02,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:02,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-22 09:46:02,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650090659] [2022-07-22 09:46:02,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:02,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 09:46:02,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:02,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 09:46:02,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:46:02,912 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:03,049 INFO L93 Difference]: Finished difference Result 187 states and 208 transitions. [2022-07-22 09:46:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 09:46:03,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 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 58 [2022-07-22 09:46:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:03,051 INFO L225 Difference]: With dead ends: 187 [2022-07-22 09:46:03,051 INFO L226 Difference]: Without dead ends: 155 [2022-07-22 09:46:03,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:46:03,052 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 172 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:03,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 80 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:46:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-22 09:46:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2022-07-22 09:46:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-07-22 09:46:03,065 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 58 [2022-07-22 09:46:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:03,066 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-07-22 09:46:03,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-07-22 09:46:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 09:46:03,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:03,067 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:03,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:03,290 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 [2022-07-22 09:46:03,290 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:03,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:03,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1317814372, now seen corresponding path program 13 times [2022-07-22 09:46:03,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:03,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360711828] [2022-07-22 09:46:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:03,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:03,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:03,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360711828] [2022-07-22 09:46:03,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360711828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:03,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128490826] [2022-07-22 09:46:03,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:46:03,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:03,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:03,560 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) [2022-07-22 09:46:03,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 09:46:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:03,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 09:46:03,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:03,669 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 [2022-07-22 09:46:03,721 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:46:03,725 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 [2022-07-22 09:46:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:03,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:04,051 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 [2022-07-22 09:46:04,052 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 [2022-07-22 09:46:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:04,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128490826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:04,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:04,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 29 [2022-07-22 09:46:04,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182921226] [2022-07-22 09:46:04,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:04,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 09:46:04,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:04,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 09:46:04,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-22 09:46:04,107 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:04,708 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2022-07-22 09:46:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 09:46:04,709 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 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 58 [2022-07-22 09:46:04,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:04,710 INFO L225 Difference]: With dead ends: 131 [2022-07-22 09:46:04,710 INFO L226 Difference]: Without dead ends: 129 [2022-07-22 09:46:04,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 09:46:04,711 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:04,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 376 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 722 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2022-07-22 09:46:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-22 09:46:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 89. [2022-07-22 09:46:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.125) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-07-22 09:46:04,720 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 58 [2022-07-22 09:46:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:04,721 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-07-22 09:46:04,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-07-22 09:46:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 09:46:04,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:04,722 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:04,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:04,941 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 [2022-07-22 09:46:04,942 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:04,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash 432429360, now seen corresponding path program 14 times [2022-07-22 09:46:04,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:04,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844433157] [2022-07-22 09:46:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:04,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:05,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:05,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844433157] [2022-07-22 09:46:05,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844433157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:05,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988074152] [2022-07-22 09:46:05,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:46:05,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:05,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:05,187 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) [2022-07-22 09:46:05,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 09:46:05,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:46:05,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:05,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 09:46:05,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:05,294 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 [2022-07-22 09:46:05,329 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:05,329 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 [2022-07-22 09:46:05,367 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:05,367 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 [2022-07-22 09:46:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:05,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:05,711 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 16 treesize of output 14 [2022-07-22 09:46:05,714 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 [2022-07-22 09:46:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:46:05,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988074152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:05,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:05,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 30 [2022-07-22 09:46:05,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160803280] [2022-07-22 09:46:05,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:05,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 09:46:05,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 09:46:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-07-22 09:46:05,760 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 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) [2022-07-22 09:46:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:06,345 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2022-07-22 09:46:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 09:46:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 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) Word has length 61 [2022-07-22 09:46:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:06,346 INFO L225 Difference]: With dead ends: 126 [2022-07-22 09:46:06,346 INFO L226 Difference]: Without dead ends: 124 [2022-07-22 09:46:06,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 09:46:06,348 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:06,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 420 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:46:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-22 09:46:06,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2022-07-22 09:46:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:06,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2022-07-22 09:46:06,358 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 61 [2022-07-22 09:46:06,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:06,358 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2022-07-22 09:46:06,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 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) [2022-07-22 09:46:06,358 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2022-07-22 09:46:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 09:46:06,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:06,359 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:06,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:06,572 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 [2022-07-22 09:46:06,572 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:06,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1425668434, now seen corresponding path program 15 times [2022-07-22 09:46:06,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:06,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140268846] [2022-07-22 09:46:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:06,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:06,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:06,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140268846] [2022-07-22 09:46:06,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140268846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:06,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854490608] [2022-07-22 09:46:06,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:46:06,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:06,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:06,830 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) [2022-07-22 09:46:06,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 09:46:06,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 09:46:06,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:06,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 09:46:06,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:07,131 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 [2022-07-22 09:46:07,718 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:07,718 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 [2022-07-22 09:46:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:07,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:08,356 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 [2022-07-22 09:46:08,359 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 [2022-07-22 09:46:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:08,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854490608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:08,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:08,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2022-07-22 09:46:08,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875086552] [2022-07-22 09:46:08,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:08,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 09:46:08,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:08,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 09:46:08,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2323, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 09:46:08,383 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:09,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:09,308 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2022-07-22 09:46:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 09:46:09,308 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-22 09:46:09,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:09,309 INFO L225 Difference]: With dead ends: 125 [2022-07-22 09:46:09,309 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 09:46:09,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=781, Invalid=6191, Unknown=0, NotChecked=0, Total=6972 [2022-07-22 09:46:09,310 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:09,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 383 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 300 Invalid, 0 Unknown, 279 Unchecked, 0.1s Time] [2022-07-22 09:46:09,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 09:46:09,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-07-22 09:46:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 87 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) [2022-07-22 09:46:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2022-07-22 09:46:09,319 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 62 [2022-07-22 09:46:09,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:09,319 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2022-07-22 09:46:09,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2022-07-22 09:46:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 09:46:09,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:09,320 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:09,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:09,535 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 [2022-07-22 09:46:09,535 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:09,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1199724314, now seen corresponding path program 16 times [2022-07-22 09:46:09,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:09,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330146749] [2022-07-22 09:46:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:09,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:09,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:09,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330146749] [2022-07-22 09:46:09,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330146749] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:09,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020768628] [2022-07-22 09:46:09,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:46:09,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:09,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:09,844 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) [2022-07-22 09:46:09,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 09:46:09,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:46:09,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:09,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 09:46:09,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:09,961 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 [2022-07-22 09:46:10,014 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:46:10,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-22 09:46:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:10,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:10,369 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 [2022-07-22 09:46:10,371 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 [2022-07-22 09:46:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:10,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020768628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:10,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:10,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 22] total 32 [2022-07-22 09:46:10,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956763475] [2022-07-22 09:46:10,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:10,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 09:46:10,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:10,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 09:46:10,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-07-22 09:46:10,425 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:11,130 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2022-07-22 09:46:11,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 09:46:11,130 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-22 09:46:11,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:11,132 INFO L225 Difference]: With dead ends: 139 [2022-07-22 09:46:11,132 INFO L226 Difference]: Without dead ends: 137 [2022-07-22 09:46:11,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 113 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=3155, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 09:46:11,133 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 112 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:11,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 485 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 936 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2022-07-22 09:46:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-22 09:46:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2022-07-22 09:46:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.108695652173913) internal successors, (102), 92 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) [2022-07-22 09:46:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2022-07-22 09:46:11,143 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 65 [2022-07-22 09:46:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:11,144 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2022-07-22 09:46:11,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2022-07-22 09:46:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 09:46:11,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:11,145 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:11,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:11,359 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 [2022-07-22 09:46:11,360 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:11,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1374347474, now seen corresponding path program 17 times [2022-07-22 09:46:11,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:11,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32460483] [2022-07-22 09:46:11,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:11,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:11,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:11,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32460483] [2022-07-22 09:46:11,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32460483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:11,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050746435] [2022-07-22 09:46:11,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:46:11,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:11,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:11,696 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) [2022-07-22 09:46:11,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 09:46:11,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-22 09:46:11,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:11,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 09:46:11,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:11,927 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 [2022-07-22 09:46:11,964 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:11,965 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 [2022-07-22 09:46:12,003 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:12,004 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 [2022-07-22 09:46:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 2 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:12,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:12,454 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 [2022-07-22 09:46:12,456 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 [2022-07-22 09:46:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:46:12,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050746435] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:12,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:12,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 33 [2022-07-22 09:46:12,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110612930] [2022-07-22 09:46:12,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:12,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 09:46:12,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:12,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 09:46:12,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 09:46:12,512 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 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) [2022-07-22 09:46:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:13,186 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2022-07-22 09:46:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 09:46:13,187 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 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) Word has length 68 [2022-07-22 09:46:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:13,188 INFO L225 Difference]: With dead ends: 134 [2022-07-22 09:46:13,188 INFO L226 Difference]: Without dead ends: 132 [2022-07-22 09:46:13,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=2614, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 09:46:13,189 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:13,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 535 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 09:46:13,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-22 09:46:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 92. [2022-07-22 09:46:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 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) [2022-07-22 09:46:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-07-22 09:46:13,200 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 68 [2022-07-22 09:46:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:13,201 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-07-22 09:46:13,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 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) [2022-07-22 09:46:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-07-22 09:46:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 09:46:13,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:13,201 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:13,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:13,401 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 [2022-07-22 09:46:13,402 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2030424676, now seen corresponding path program 18 times [2022-07-22 09:46:13,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:13,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055911567] [2022-07-22 09:46:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:13,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:13,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:13,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055911567] [2022-07-22 09:46:13,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055911567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:13,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170057460] [2022-07-22 09:46:13,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:46:13,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:13,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:13,696 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) [2022-07-22 09:46:13,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 09:46:14,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-22 09:46:14,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:14,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 09:46:14,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:14,432 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 [2022-07-22 09:46:15,072 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:15,072 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 [2022-07-22 09:46:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 120 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:15,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:16,003 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 [2022-07-22 09:46:16,006 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 34 treesize of output 28 [2022-07-22 09:46:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:16,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170057460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:16,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:16,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 57 [2022-07-22 09:46:16,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208747422] [2022-07-22 09:46:16,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:16,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-22 09:46:16,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:16,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-22 09:46:16,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2805, Unknown=0, NotChecked=0, Total=3192 [2022-07-22 09:46:16,036 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:16,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:16,853 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2022-07-22 09:46:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 09:46:16,854 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 0 states have call successors, (0), 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 69 [2022-07-22 09:46:16,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:16,854 INFO L225 Difference]: With dead ends: 133 [2022-07-22 09:46:16,855 INFO L226 Difference]: Without dead ends: 93 [2022-07-22 09:46:16,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=779, Invalid=6361, Unknown=0, NotChecked=0, Total=7140 [2022-07-22 09:46:16,857 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:16,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 427 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 392 Invalid, 0 Unknown, 177 Unchecked, 0.1s Time] [2022-07-22 09:46:16,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-22 09:46:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-07-22 09:46:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 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) [2022-07-22 09:46:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-07-22 09:46:16,865 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 69 [2022-07-22 09:46:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:16,865 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-07-22 09:46:16,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-07-22 09:46:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 09:46:16,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:16,866 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:16,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-22 09:46:17,066 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 [2022-07-22 09:46:17,066 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:17,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1242460280, now seen corresponding path program 19 times [2022-07-22 09:46:17,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:17,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429073111] [2022-07-22 09:46:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:17,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:17,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:17,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429073111] [2022-07-22 09:46:17,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429073111] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:17,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570753668] [2022-07-22 09:46:17,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:46:17,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:17,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:17,373 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) [2022-07-22 09:46:17,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 09:46:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:17,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 09:46:17,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:17,515 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 [2022-07-22 09:46:17,565 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:46:17,565 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 [2022-07-22 09:46:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:17,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:17,967 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 [2022-07-22 09:46:17,970 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 [2022-07-22 09:46:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:18,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570753668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:18,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:18,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24] total 35 [2022-07-22 09:46:18,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468499415] [2022-07-22 09:46:18,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:18,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 09:46:18,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:18,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 09:46:18,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 09:46:18,027 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:18,752 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2022-07-22 09:46:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-22 09:46:18,753 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 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 72 [2022-07-22 09:46:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:18,753 INFO L225 Difference]: With dead ends: 146 [2022-07-22 09:46:18,753 INFO L226 Difference]: Without dead ends: 144 [2022-07-22 09:46:18,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 133 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=3742, Unknown=0, NotChecked=0, Total=4032 [2022-07-22 09:46:18,755 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:18,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 528 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1083 Invalid, 0 Unknown, 26 Unchecked, 0.4s Time] [2022-07-22 09:46:18,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-22 09:46:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2022-07-22 09:46:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.09375) internal successors, (105), 96 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2022-07-22 09:46:18,769 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 72 [2022-07-22 09:46:18,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:18,769 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2022-07-22 09:46:18,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:18,770 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2022-07-22 09:46:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 09:46:18,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:18,770 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:18,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-22 09:46:18,975 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 [2022-07-22 09:46:18,975 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1008588316, now seen corresponding path program 20 times [2022-07-22 09:46:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:18,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633106269] [2022-07-22 09:46:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:18,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:19,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:19,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633106269] [2022-07-22 09:46:19,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633106269] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:19,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155755498] [2022-07-22 09:46:19,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:46:19,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:19,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:19,325 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) [2022-07-22 09:46:19,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 09:46:19,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:46:19,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:19,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-22 09:46:19,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:19,452 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 [2022-07-22 09:46:19,482 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:19,482 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 [2022-07-22 09:46:19,567 INFO L356 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2022-07-22 09:46:19,568 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 [2022-07-22 09:46:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 2 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:22,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:22,611 WARN L833 $PredicateComparison]: unable to prove that (and (< 6 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_502| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_502|)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_502| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)))) is different from false [2022-07-22 09:46:22,617 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 [2022-07-22 09:46:22,620 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 49 treesize of output 45 [2022-07-22 09:46:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-07-22 09:46:22,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155755498] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:22,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:22,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 42 [2022-07-22 09:46:22,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057743520] [2022-07-22 09:46:22,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:22,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 09:46:22,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:22,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 09:46:22,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1482, Unknown=1, NotChecked=78, Total=1722 [2022-07-22 09:46:22,675 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 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) [2022-07-22 09:46:23,291 WARN L833 $PredicateComparison]: unable to prove that (and (< 6 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_502| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_502|)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_502| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0))) (<= |c_ULTIMATE.start_main_~i~0#1| 8) (<= 8 |c_ULTIMATE.start_main_~i~0#1|) (= (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 [2022-07-22 09:46:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:24,364 INFO L93 Difference]: Finished difference Result 171 states and 181 transitions. [2022-07-22 09:46:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 09:46:24,365 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 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) Word has length 75 [2022-07-22 09:46:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:24,365 INFO L225 Difference]: With dead ends: 171 [2022-07-22 09:46:24,365 INFO L226 Difference]: Without dead ends: 169 [2022-07-22 09:46:24,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=224, Invalid=2434, Unknown=2, NotChecked=202, Total=2862 [2022-07-22 09:46:24,366 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:24,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 532 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 838 Invalid, 0 Unknown, 235 Unchecked, 0.3s Time] [2022-07-22 09:46:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-22 09:46:24,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 100. [2022-07-22 09:46:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:24,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2022-07-22 09:46:24,382 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 75 [2022-07-22 09:46:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:24,382 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2022-07-22 09:46:24,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 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) [2022-07-22 09:46:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2022-07-22 09:46:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 09:46:24,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:24,383 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:24,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-22 09:46:24,595 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 [2022-07-22 09:46:24,595 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1156969278, now seen corresponding path program 21 times [2022-07-22 09:46:24,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:24,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21903251] [2022-07-22 09:46:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:24,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:24,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:24,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21903251] [2022-07-22 09:46:24,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21903251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:24,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858787896] [2022-07-22 09:46:24,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:46:24,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:24,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:24,939 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) [2022-07-22 09:46:24,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 09:46:25,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-22 09:46:25,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:25,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 09:46:25,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:25,473 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 [2022-07-22 09:46:26,156 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:26,156 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 [2022-07-22 09:46:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:26,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:27,133 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 [2022-07-22 09:46:27,136 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 [2022-07-22 09:46:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 144 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:27,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858787896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:27,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:27,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2022-07-22 09:46:27,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978031300] [2022-07-22 09:46:27,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:27,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-22 09:46:27,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:27,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-22 09:46:27,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3331, Unknown=1, NotChecked=0, Total=3782 [2022-07-22 09:46:27,164 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:28,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:28,361 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2022-07-22 09:46:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-22 09:46:28,362 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 0 states have call successors, (0), 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 76 [2022-07-22 09:46:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:28,362 INFO L225 Difference]: With dead ends: 146 [2022-07-22 09:46:28,362 INFO L226 Difference]: Without dead ends: 102 [2022-07-22 09:46:28,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1103, Invalid=9402, Unknown=1, NotChecked=0, Total=10506 [2022-07-22 09:46:28,364 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:28,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 476 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 461 Invalid, 0 Unknown, 134 Unchecked, 0.2s Time] [2022-07-22 09:46:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-22 09:46:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-07-22 09:46:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.101010101010101) internal successors, (109), 99 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2022-07-22 09:46:28,380 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 76 [2022-07-22 09:46:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:28,380 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2022-07-22 09:46:28,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2022-07-22 09:46:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 09:46:28,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:28,381 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:28,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:28,587 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 [2022-07-22 09:46:28,587 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1212887086, now seen corresponding path program 22 times [2022-07-22 09:46:28,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:28,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204913194] [2022-07-22 09:46:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:28,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:28,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204913194] [2022-07-22 09:46:28,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204913194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208112638] [2022-07-22 09:46:28,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:46:28,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:28,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:28,946 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) [2022-07-22 09:46:28,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 09:46:29,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:46:29,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:29,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 09:46:29,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:29,080 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 [2022-07-22 09:46:29,125 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:46:29,125 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 [2022-07-22 09:46:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:29,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:29,570 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 [2022-07-22 09:46:29,572 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 [2022-07-22 09:46:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:29,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208112638] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:29,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:29,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 38 [2022-07-22 09:46:29,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817741147] [2022-07-22 09:46:29,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:29,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 09:46:29,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 09:46:29,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 09:46:29,647 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 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) [2022-07-22 09:46:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:30,678 INFO L93 Difference]: Finished difference Result 195 states and 204 transitions. [2022-07-22 09:46:30,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-22 09:46:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 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) Word has length 79 [2022-07-22 09:46:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:30,679 INFO L225 Difference]: With dead ends: 195 [2022-07-22 09:46:30,679 INFO L226 Difference]: Without dead ends: 193 [2022-07-22 09:46:30,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 139 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2022-07-22 09:46:30,681 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 96 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:30,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 810 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1507 Invalid, 0 Unknown, 62 Unchecked, 0.6s Time] [2022-07-22 09:46:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-22 09:46:30,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 105. [2022-07-22 09:46:30,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0961538461538463) internal successors, (114), 104 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2022-07-22 09:46:30,697 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 79 [2022-07-22 09:46:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:30,698 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2022-07-22 09:46:30,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 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) [2022-07-22 09:46:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2022-07-22 09:46:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 09:46:30,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:30,699 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:30,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-22 09:46:30,905 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 [2022-07-22 09:46:30,905 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:30,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:30,906 INFO L85 PathProgramCache]: Analyzing trace with hash -931415362, now seen corresponding path program 23 times [2022-07-22 09:46:30,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:30,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9646074] [2022-07-22 09:46:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:30,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:31,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:31,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9646074] [2022-07-22 09:46:31,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9646074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:31,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055085578] [2022-07-22 09:46:31,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:46:31,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:31,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:31,340 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) [2022-07-22 09:46:31,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 09:46:31,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-22 09:46:31,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:31,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 09:46:31,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:31,595 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 [2022-07-22 09:46:31,634 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:31,635 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 [2022-07-22 09:46:31,675 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:31,675 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 [2022-07-22 09:46:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 2 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:32,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:32,204 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 [2022-07-22 09:46:32,206 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 [2022-07-22 09:46:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:46:32,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055085578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:32,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:32,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 39 [2022-07-22 09:46:32,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63781788] [2022-07-22 09:46:32,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:32,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 09:46:32,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:32,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 09:46:32,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 09:46:32,267 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 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) [2022-07-22 09:46:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:33,172 INFO L93 Difference]: Finished difference Result 190 states and 199 transitions. [2022-07-22 09:46:33,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 09:46:33,172 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 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) Word has length 82 [2022-07-22 09:46:33,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:33,173 INFO L225 Difference]: With dead ends: 190 [2022-07-22 09:46:33,173 INFO L226 Difference]: Without dead ends: 188 [2022-07-22 09:46:33,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=292, Invalid=3740, Unknown=0, NotChecked=0, Total=4032 [2022-07-22 09:46:33,174 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 103 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:33,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 738 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 09:46:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-22 09:46:33,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 138. [2022-07-22 09:46:33,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2022-07-22 09:46:33,201 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 82 [2022-07-22 09:46:33,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:33,201 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2022-07-22 09:46:33,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 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) [2022-07-22 09:46:33,201 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2022-07-22 09:46:33,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 09:46:33,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:33,201 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:33,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-22 09:46:33,402 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 [2022-07-22 09:46:33,402 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:33,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:33,402 INFO L85 PathProgramCache]: Analyzing trace with hash 925630088, now seen corresponding path program 24 times [2022-07-22 09:46:33,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:33,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318093224] [2022-07-22 09:46:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:33,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:33,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:33,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318093224] [2022-07-22 09:46:33,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318093224] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:33,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452447607] [2022-07-22 09:46:33,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:46:33,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:33,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:33,812 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) [2022-07-22 09:46:33,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 09:46:34,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-22 09:46:34,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:34,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 09:46:34,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:34,620 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 [2022-07-22 09:46:35,394 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:35,394 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 [2022-07-22 09:46:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 190 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:35,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:36,360 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 [2022-07-22 09:46:36,363 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 [2022-07-22 09:46:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 180 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:36,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452447607] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:36,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:36,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 67 [2022-07-22 09:46:36,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704489365] [2022-07-22 09:46:36,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:36,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-22 09:46:36,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:36,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-22 09:46:36,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=3904, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 09:46:36,401 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:37,782 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2022-07-22 09:46:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 09:46:37,783 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 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 83 [2022-07-22 09:46:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:37,783 INFO L225 Difference]: With dead ends: 187 [2022-07-22 09:46:37,784 INFO L226 Difference]: Without dead ends: 139 [2022-07-22 09:46:37,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2372 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1269, Invalid=11163, Unknown=0, NotChecked=0, Total=12432 [2022-07-22 09:46:37,785 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 79 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:37,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 496 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 496 Invalid, 0 Unknown, 330 Unchecked, 0.2s Time] [2022-07-22 09:46:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-22 09:46:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-07-22 09:46:37,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.072992700729927) internal successors, (147), 137 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2022-07-22 09:46:37,813 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 83 [2022-07-22 09:46:37,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:37,813 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2022-07-22 09:46:37,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:37,813 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2022-07-22 09:46:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-22 09:46:37,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:37,814 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:37,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:38,019 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 [2022-07-22 09:46:38,019 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:38,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:38,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1667994484, now seen corresponding path program 25 times [2022-07-22 09:46:38,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:38,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59105282] [2022-07-22 09:46:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:38,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:38,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:38,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59105282] [2022-07-22 09:46:38,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59105282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:38,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73537110] [2022-07-22 09:46:38,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:46:38,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:38,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:38,464 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) [2022-07-22 09:46:38,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-22 09:46:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:38,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 09:46:38,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:38,643 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 [2022-07-22 09:46:38,718 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:46:38,719 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 [2022-07-22 09:46:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:39,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:39,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:46:39,235 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 [2022-07-22 09:46:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:39,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73537110] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:39,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:39,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 28] total 41 [2022-07-22 09:46:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947210323] [2022-07-22 09:46:39,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:39,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 09:46:39,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:39,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 09:46:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 09:46:39,303 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:40,500 INFO L93 Difference]: Finished difference Result 203 states and 211 transitions. [2022-07-22 09:46:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 09:46:40,500 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 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 86 [2022-07-22 09:46:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:40,501 INFO L225 Difference]: With dead ends: 203 [2022-07-22 09:46:40,501 INFO L226 Difference]: Without dead ends: 201 [2022-07-22 09:46:40,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 152 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=348, Invalid=5504, Unknown=0, NotChecked=0, Total=5852 [2022-07-22 09:46:40,502 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 114 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:40,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 905 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1708 Invalid, 0 Unknown, 5 Unchecked, 0.6s Time] [2022-07-22 09:46:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-22 09:46:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 143. [2022-07-22 09:46:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0704225352112675) internal successors, (152), 142 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2022-07-22 09:46:40,532 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 86 [2022-07-22 09:46:40,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:40,532 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2022-07-22 09:46:40,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:40,532 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2022-07-22 09:46:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-22 09:46:40,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:40,533 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:40,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:40,733 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 [2022-07-22 09:46:40,734 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:40,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:40,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1635858680, now seen corresponding path program 26 times [2022-07-22 09:46:40,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:40,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498147] [2022-07-22 09:46:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:40,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:41,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:41,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498147] [2022-07-22 09:46:41,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498147] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:41,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143567481] [2022-07-22 09:46:41,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:46:41,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:41,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:41,145 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) [2022-07-22 09:46:41,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-22 09:46:41,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:46:41,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:41,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-22 09:46:41,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:41,320 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 [2022-07-22 09:46:41,353 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:41,354 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 [2022-07-22 09:46:41,388 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:41,388 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 [2022-07-22 09:46:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 2 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:41,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:41,909 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 [2022-07-22 09:46:41,911 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 [2022-07-22 09:46:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:46:41,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143567481] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:41,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:41,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 42 [2022-07-22 09:46:41,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220330306] [2022-07-22 09:46:41,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:41,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 09:46:41,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:41,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 09:46:41,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 09:46:41,977 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:43,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:43,007 INFO L93 Difference]: Finished difference Result 198 states and 206 transitions. [2022-07-22 09:46:43,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-22 09:46:43,007 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 states have internal predecessors, (141), 0 states have call successors, (0), 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 89 [2022-07-22 09:46:43,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:43,008 INFO L225 Difference]: With dead ends: 198 [2022-07-22 09:46:43,008 INFO L226 Difference]: Without dead ends: 196 [2022-07-22 09:46:43,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 157 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2022-07-22 09:46:43,009 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 109 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:43,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 842 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 09:46:43,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-07-22 09:46:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2022-07-22 09:46:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.070921985815603) internal successors, (151), 141 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) [2022-07-22 09:46:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2022-07-22 09:46:43,040 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 89 [2022-07-22 09:46:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:43,041 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2022-07-22 09:46:43,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2022-07-22 09:46:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 09:46:43,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:43,042 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:43,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-22 09:46:43,260 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 [2022-07-22 09:46:43,261 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:43,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:43,261 INFO L85 PathProgramCache]: Analyzing trace with hash -592174806, now seen corresponding path program 27 times [2022-07-22 09:46:43,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:43,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084556298] [2022-07-22 09:46:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:43,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:43,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:43,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084556298] [2022-07-22 09:46:43,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084556298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:43,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921840084] [2022-07-22 09:46:43,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:46:43,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:43,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:43,720 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) [2022-07-22 09:46:43,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-22 09:46:44,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-22 09:46:44,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:44,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 09:46:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:44,330 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 [2022-07-22 09:46:45,179 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:45,180 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 [2022-07-22 09:46:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 231 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:45,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:46,401 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 [2022-07-22 09:46:46,403 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 [2022-07-22 09:46:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:46,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921840084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:46,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:46,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 72 [2022-07-22 09:46:46,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638131696] [2022-07-22 09:46:46,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:46,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-22 09:46:46,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:46,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-22 09:46:46,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=4520, Unknown=1, NotChecked=0, Total=5112 [2022-07-22 09:46:46,436 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:48,160 INFO L93 Difference]: Finished difference Result 194 states and 203 transitions. [2022-07-22 09:46:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 09:46:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 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 90 [2022-07-22 09:46:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:48,161 INFO L225 Difference]: With dead ends: 194 [2022-07-22 09:46:48,161 INFO L226 Difference]: Without dead ends: 142 [2022-07-22 09:46:48,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2706 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1415, Invalid=12864, Unknown=1, NotChecked=0, Total=14280 [2022-07-22 09:46:48,162 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 94 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:48,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 553 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 616 Invalid, 0 Unknown, 181 Unchecked, 0.2s Time] [2022-07-22 09:46:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-22 09:46:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-07-22 09:46:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0638297872340425) internal successors, (150), 141 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) [2022-07-22 09:46:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 150 transitions. [2022-07-22 09:46:48,196 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 150 transitions. Word has length 90 [2022-07-22 09:46:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:48,196 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 150 transitions. [2022-07-22 09:46:48,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 150 transitions. [2022-07-22 09:46:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-22 09:46:48,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:48,197 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:48,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:48,402 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 [2022-07-22 09:46:48,402 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:48,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:48,402 INFO L85 PathProgramCache]: Analyzing trace with hash 756771518, now seen corresponding path program 28 times [2022-07-22 09:46:48,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:48,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871481637] [2022-07-22 09:46:48,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:48,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:48,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:48,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871481637] [2022-07-22 09:46:48,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871481637] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:48,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914179058] [2022-07-22 09:46:48,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:46:48,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:48,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:48,896 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) [2022-07-22 09:46:48,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-22 09:46:49,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:46:49,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 09:46:49,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:49,098 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 [2022-07-22 09:46:49,152 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:46:49,152 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 [2022-07-22 09:46:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:49,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:49,706 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 [2022-07-22 09:46:49,709 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 [2022-07-22 09:46:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:49,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914179058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:49,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:49,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 44 [2022-07-22 09:46:49,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393789168] [2022-07-22 09:46:49,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:49,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-22 09:46:49,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:49,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-22 09:46:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 09:46:49,780 INFO L87 Difference]: Start difference. First operand 142 states and 150 transitions. Second operand has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:51,026 INFO L93 Difference]: Finished difference Result 211 states and 218 transitions. [2022-07-22 09:46:51,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-22 09:46:51,027 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-07-22 09:46:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:51,027 INFO L225 Difference]: With dead ends: 211 [2022-07-22 09:46:51,027 INFO L226 Difference]: Without dead ends: 209 [2022-07-22 09:46:51,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 165 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=375, Invalid=6431, Unknown=0, NotChecked=0, Total=6806 [2022-07-22 09:46:51,028 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 150 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:51,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1022 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1917 Invalid, 0 Unknown, 9 Unchecked, 0.7s Time] [2022-07-22 09:46:51,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-22 09:46:51,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2022-07-22 09:46:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0616438356164384) internal successors, (155), 146 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 155 transitions. [2022-07-22 09:46:51,062 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 155 transitions. Word has length 93 [2022-07-22 09:46:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:51,062 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 155 transitions. [2022-07-22 09:46:51,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 155 transitions. [2022-07-22 09:46:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-22 09:46:51,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:51,063 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:51,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:51,283 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 [2022-07-22 09:46:51,283 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:51,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash 287613210, now seen corresponding path program 2 times [2022-07-22 09:46:51,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:51,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759586092] [2022-07-22 09:46:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:51,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 09:46:51,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:51,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759586092] [2022-07-22 09:46:51,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759586092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:51,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118876230] [2022-07-22 09:46:51,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:46:51,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:51,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:51,452 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) [2022-07-22 09:46:51,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-22 09:46:51,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:46:51,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 09:46:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 09:46:51,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 09:46:52,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118876230] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:52,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:52,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-07-22 09:46:52,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134558301] [2022-07-22 09:46:52,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:52,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-22 09:46:52,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:52,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-22 09:46:52,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 09:46:52,050 INFO L87 Difference]: Start difference. First operand 147 states and 155 transitions. Second operand has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:52,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:52,380 INFO L93 Difference]: Finished difference Result 458 states and 504 transitions. [2022-07-22 09:46:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 09:46:52,381 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-07-22 09:46:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:52,382 INFO L225 Difference]: With dead ends: 458 [2022-07-22 09:46:52,382 INFO L226 Difference]: Without dead ends: 406 [2022-07-22 09:46:52,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 09:46:52,382 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 541 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:52,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 152 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:46:52,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-07-22 09:46:52,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 201. [2022-07-22 09:46:52,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.135) internal successors, (227), 200 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) [2022-07-22 09:46:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 227 transitions. [2022-07-22 09:46:52,433 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 227 transitions. Word has length 93 [2022-07-22 09:46:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:52,433 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 227 transitions. [2022-07-22 09:46:52,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 227 transitions. [2022-07-22 09:46:52,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-22 09:46:52,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:52,434 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:52,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:52,647 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 [2022-07-22 09:46:52,647 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:52,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:52,648 INFO L85 PathProgramCache]: Analyzing trace with hash -792278870, now seen corresponding path program 29 times [2022-07-22 09:46:52,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:52,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472143941] [2022-07-22 09:46:52,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:52,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:53,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:53,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472143941] [2022-07-22 09:46:53,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472143941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:53,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947938127] [2022-07-22 09:46:53,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:46:53,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:53,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:53,126 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) [2022-07-22 09:46:53,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-22 09:46:53,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-22 09:46:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:53,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 09:46:53,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:53,434 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 [2022-07-22 09:46:53,466 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:53,467 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 [2022-07-22 09:46:53,502 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:46:53,502 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 [2022-07-22 09:46:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 2 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:53,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:54,158 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 [2022-07-22 09:46:54,160 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 [2022-07-22 09:46:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:46:54,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947938127] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:54,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:54,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 45 [2022-07-22 09:46:54,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048390455] [2022-07-22 09:46:54,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:54,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 09:46:54,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:54,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 09:46:54,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 09:46:54,232 INFO L87 Difference]: Start difference. First operand 201 states and 227 transitions. Second operand has 45 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 45 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:46:55,493 INFO L93 Difference]: Finished difference Result 260 states and 285 transitions. [2022-07-22 09:46:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-22 09:46:55,494 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 45 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-07-22 09:46:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:46:55,496 INFO L225 Difference]: With dead ends: 260 [2022-07-22 09:46:55,496 INFO L226 Difference]: Without dead ends: 258 [2022-07-22 09:46:55,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 170 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=336, Invalid=5066, Unknown=0, NotChecked=0, Total=5402 [2022-07-22 09:46:55,498 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 120 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 09:46:55,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1030 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 09:46:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-22 09:46:55,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 200. [2022-07-22 09:46:55,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.135678391959799) internal successors, (226), 199 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 226 transitions. [2022-07-22 09:46:55,543 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 226 transitions. Word has length 96 [2022-07-22 09:46:55,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:46:55,544 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 226 transitions. [2022-07-22 09:46:55,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 45 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:46:55,544 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 226 transitions. [2022-07-22 09:46:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 09:46:55,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:46:55,545 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:46:55,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-22 09:46:55,763 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 [2022-07-22 09:46:55,763 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:46:55,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:46:55,764 INFO L85 PathProgramCache]: Analyzing trace with hash 280183668, now seen corresponding path program 30 times [2022-07-22 09:46:55,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:46:55,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91848288] [2022-07-22 09:46:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:46:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:46:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:46:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:56,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:46:56,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91848288] [2022-07-22 09:46:56,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91848288] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:46:56,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227783360] [2022-07-22 09:46:56,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:46:56,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:46:56,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:46:56,410 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) [2022-07-22 09:46:56,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-22 09:46:56,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-22 09:46:56,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:46:56,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 09:46:56,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:46:57,077 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 [2022-07-22 09:46:58,044 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:46:58,044 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 [2022-07-22 09:46:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 276 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:58,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:46:59,118 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 [2022-07-22 09:46:59,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-07-22 09:46:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 264 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:46:59,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227783360] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:46:59,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:46:59,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 76 [2022-07-22 09:46:59,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285682639] [2022-07-22 09:46:59,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:46:59,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-22 09:46:59,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:46:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-22 09:46:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=4904, Unknown=0, NotChecked=0, Total=5700 [2022-07-22 09:46:59,158 INFO L87 Difference]: Start difference. First operand 200 states and 226 transitions. Second operand has 76 states, 76 states have (on average 3.1842105263157894) internal successors, (242), 76 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:00,715 INFO L93 Difference]: Finished difference Result 257 states and 283 transitions. [2022-07-22 09:47:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-22 09:47:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.1842105263157894) internal successors, (242), 76 states have internal predecessors, (242), 0 states have call successors, (0), 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 97 [2022-07-22 09:47:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:00,716 INFO L225 Difference]: With dead ends: 257 [2022-07-22 09:47:00,716 INFO L226 Difference]: Without dead ends: 201 [2022-07-22 09:47:00,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4174 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2078, Invalid=14178, Unknown=0, NotChecked=0, Total=16256 [2022-07-22 09:47:00,719 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 200 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:00,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 607 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 321 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2022-07-22 09:47:00,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-22 09:47:00,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-07-22 09:47:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1306532663316582) internal successors, (225), 199 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 225 transitions. [2022-07-22 09:47:00,782 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 225 transitions. Word has length 97 [2022-07-22 09:47:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:00,782 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 225 transitions. [2022-07-22 09:47:00,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.1842105263157894) internal successors, (242), 76 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 225 transitions. [2022-07-22 09:47:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-22 09:47:00,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:00,784 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:00,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-22 09:47:00,984 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 [2022-07-22 09:47:00,984 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash 308661088, now seen corresponding path program 31 times [2022-07-22 09:47:00,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:00,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894716880] [2022-07-22 09:47:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:00,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:01,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:01,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894716880] [2022-07-22 09:47:01,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894716880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:01,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986529329] [2022-07-22 09:47:01,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:47:01,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:01,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:01,655 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) [2022-07-22 09:47:01,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-22 09:47:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:01,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-22 09:47:01,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:02,064 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 [2022-07-22 09:47:02,129 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:47:02,129 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 [2022-07-22 09:47:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:02,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:05,137 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1054| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1054|)) (forall ((v_ArrVal_1362 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_1054| 4)) v_ArrVal_1362) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)))) is different from false [2022-07-22 09:47:05,142 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 [2022-07-22 09:47:05,143 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 [2022-07-22 09:47:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-07-22 09:47:05,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986529329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:05,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:05,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 32] total 76 [2022-07-22 09:47:05,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097159371] [2022-07-22 09:47:05,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:05,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-22 09:47:05,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-22 09:47:05,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=5228, Unknown=1, NotChecked=146, Total=5700 [2022-07-22 09:47:05,357 INFO L87 Difference]: Start difference. First operand 200 states and 225 transitions. Second operand has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 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) [2022-07-22 09:47:08,137 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_1054| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1054|)) (forall ((v_ArrVal_1362 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_1054| 4)) v_ArrVal_1362) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)))) (= |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 [2022-07-22 09:47:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:09,110 INFO L93 Difference]: Finished difference Result 212 states and 236 transitions. [2022-07-22 09:47:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-22 09:47:09,111 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 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 100 [2022-07-22 09:47:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:09,112 INFO L225 Difference]: With dead ends: 212 [2022-07-22 09:47:09,112 INFO L226 Difference]: Without dead ends: 210 [2022-07-22 09:47:09,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 156 SyntacticMatches, 11 SemanticMatches, 105 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3792 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=604, Invalid=10322, Unknown=2, NotChecked=414, Total=11342 [2022-07-22 09:47:09,113 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 170 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 3322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:09,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1341 Invalid, 3322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3017 Invalid, 0 Unknown, 134 Unchecked, 1.0s Time] [2022-07-22 09:47:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-22 09:47:09,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-07-22 09:47:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1280788177339902) internal successors, (229), 203 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 229 transitions. [2022-07-22 09:47:09,152 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 229 transitions. Word has length 100 [2022-07-22 09:47:09,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:09,153 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 229 transitions. [2022-07-22 09:47:09,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 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) [2022-07-22 09:47:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 229 transitions. [2022-07-22 09:47:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-22 09:47:09,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:09,153 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:09,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-22 09:47:09,354 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 [2022-07-22 09:47:09,354 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:09,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:09,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1833401578, now seen corresponding path program 32 times [2022-07-22 09:47:09,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:09,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681733330] [2022-07-22 09:47:09,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:09,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:09,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:09,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681733330] [2022-07-22 09:47:09,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681733330] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:09,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673790172] [2022-07-22 09:47:09,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:47:09,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:09,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:09,852 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) [2022-07-22 09:47:09,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-22 09:47:09,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:47:09,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:09,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-22 09:47:09,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:10,047 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 [2022-07-22 09:47:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:10,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:10,660 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 [2022-07-22 09:47:10,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-22 09:47:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:10,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673790172] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:10,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:10,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 47 [2022-07-22 09:47:10,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890316351] [2022-07-22 09:47:10,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:10,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 09:47:10,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:10,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 09:47:10,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 09:47:10,746 INFO L87 Difference]: Start difference. First operand 204 states and 229 transitions. Second operand has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:12,086 INFO L93 Difference]: Finished difference Result 216 states and 240 transitions. [2022-07-22 09:47:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-22 09:47:12,086 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 0 states have call successors, (0), 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 104 [2022-07-22 09:47:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:12,087 INFO L225 Difference]: With dead ends: 216 [2022-07-22 09:47:12,087 INFO L226 Difference]: Without dead ends: 214 [2022-07-22 09:47:12,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 188 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=326, Invalid=5680, Unknown=0, NotChecked=0, Total=6006 [2022-07-22 09:47:12,088 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 89 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 2512 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:12,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 1033 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2512 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 09:47:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-22 09:47:12,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 208. [2022-07-22 09:47:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1256038647342994) internal successors, (233), 207 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) [2022-07-22 09:47:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 233 transitions. [2022-07-22 09:47:12,130 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 233 transitions. Word has length 104 [2022-07-22 09:47:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:12,131 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 233 transitions. [2022-07-22 09:47:12,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 233 transitions. [2022-07-22 09:47:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-22 09:47:12,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:12,132 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:12,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:12,333 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 [2022-07-22 09:47:12,333 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:12,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1227067444, now seen corresponding path program 33 times [2022-07-22 09:47:12,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:12,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800606263] [2022-07-22 09:47:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:12,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 339 proven. 340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:12,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:12,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800606263] [2022-07-22 09:47:12,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800606263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:12,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122681670] [2022-07-22 09:47:12,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:47:12,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:12,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:12,655 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) [2022-07-22 09:47:12,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-22 09:47:13,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-22 09:47:13,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:13,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 09:47:13,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:13,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:13,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122681670] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:13,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:13,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-07-22 09:47:13,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72881734] [2022-07-22 09:47:13,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:13,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 09:47:13,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:13,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 09:47:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 09:47:13,821 INFO L87 Difference]: Start difference. First operand 208 states and 233 transitions. Second operand has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:14,165 INFO L93 Difference]: Finished difference Result 282 states and 306 transitions. [2022-07-22 09:47:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 09:47:14,166 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-22 09:47:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:14,166 INFO L225 Difference]: With dead ends: 282 [2022-07-22 09:47:14,166 INFO L226 Difference]: Without dead ends: 218 [2022-07-22 09:47:14,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 09:47:14,167 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 287 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:14,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 270 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:47:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-22 09:47:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2022-07-22 09:47:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1207729468599035) internal successors, (232), 207 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 232 transitions. [2022-07-22 09:47:14,209 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 232 transitions. Word has length 108 [2022-07-22 09:47:14,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:14,209 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 232 transitions. [2022-07-22 09:47:14,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 232 transitions. [2022-07-22 09:47:14,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-22 09:47:14,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:14,210 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:14,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-22 09:47:14,420 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 [2022-07-22 09:47:14,420 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:14,421 INFO L85 PathProgramCache]: Analyzing trace with hash -672924576, now seen corresponding path program 34 times [2022-07-22 09:47:14,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:14,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47824413] [2022-07-22 09:47:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:14,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:15,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:15,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47824413] [2022-07-22 09:47:15,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47824413] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:15,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742901161] [2022-07-22 09:47:15,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:47:15,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:15,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:15,089 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) [2022-07-22 09:47:15,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-22 09:47:15,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:47:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-22 09:47:15,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:15,336 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 [2022-07-22 09:47:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:15,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:16,017 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 [2022-07-22 09:47:16,018 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 [2022-07-22 09:47:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:16,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742901161] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:16,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:16,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 50 [2022-07-22 09:47:16,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076677865] [2022-07-22 09:47:16,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:16,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 09:47:16,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:16,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 09:47:16,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 09:47:16,115 INFO L87 Difference]: Start difference. First operand 208 states and 232 transitions. Second operand has 50 states, 50 states have (on average 3.48) internal successors, (174), 50 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:17,727 INFO L93 Difference]: Finished difference Result 220 states and 243 transitions. [2022-07-22 09:47:17,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-22 09:47:17,727 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.48) internal successors, (174), 50 states have internal predecessors, (174), 0 states have call successors, (0), 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 111 [2022-07-22 09:47:17,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:17,728 INFO L225 Difference]: With dead ends: 220 [2022-07-22 09:47:17,728 INFO L226 Difference]: Without dead ends: 218 [2022-07-22 09:47:17,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 201 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=347, Invalid=6459, Unknown=0, NotChecked=0, Total=6806 [2022-07-22 09:47:17,729 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 94 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 3127 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 3237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:17,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1332 Invalid, 3237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3127 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 09:47:17,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-22 09:47:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2022-07-22 09:47:17,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.1184834123222749) internal successors, (236), 211 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 236 transitions. [2022-07-22 09:47:17,775 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 236 transitions. Word has length 111 [2022-07-22 09:47:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:17,775 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 236 transitions. [2022-07-22 09:47:17,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.48) internal successors, (174), 50 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 236 transitions. [2022-07-22 09:47:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-22 09:47:17,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:17,776 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:17,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:17,979 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 [2022-07-22 09:47:17,980 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:17,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:17,980 INFO L85 PathProgramCache]: Analyzing trace with hash 464925718, now seen corresponding path program 35 times [2022-07-22 09:47:17,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:17,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430655839] [2022-07-22 09:47:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:17,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 393 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:18,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:18,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430655839] [2022-07-22 09:47:18,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430655839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:18,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142394639] [2022-07-22 09:47:18,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:47:18,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:18,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:18,392 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) [2022-07-22 09:47:18,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-22 09:47:18,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-22 09:47:18,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:18,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 09:47:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:19,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:19,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142394639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:19,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:19,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-07-22 09:47:19,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438363072] [2022-07-22 09:47:19,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:19,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 09:47:19,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:19,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 09:47:19,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 09:47:19,309 INFO L87 Difference]: Start difference. First operand 212 states and 236 transitions. Second operand has 53 states, 53 states have (on average 3.509433962264151) internal successors, (186), 53 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) [2022-07-22 09:47:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:19,675 INFO L93 Difference]: Finished difference Result 290 states and 313 transitions. [2022-07-22 09:47:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 09:47:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.509433962264151) internal successors, (186), 53 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 115 [2022-07-22 09:47:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:19,676 INFO L225 Difference]: With dead ends: 290 [2022-07-22 09:47:19,676 INFO L226 Difference]: Without dead ends: 222 [2022-07-22 09:47:19,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2022-07-22 09:47:19,676 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 288 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:19,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 273 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:47:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-22 09:47:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 212. [2022-07-22 09:47:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.113744075829384) internal successors, (235), 211 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 235 transitions. [2022-07-22 09:47:19,714 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 235 transitions. Word has length 115 [2022-07-22 09:47:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:19,714 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 235 transitions. [2022-07-22 09:47:19,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.509433962264151) internal successors, (186), 53 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) [2022-07-22 09:47:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 235 transitions. [2022-07-22 09:47:19,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-22 09:47:19,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:19,716 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:19,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-22 09:47:19,929 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 [2022-07-22 09:47:19,929 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:19,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:19,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1200036098, now seen corresponding path program 36 times [2022-07-22 09:47:19,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:19,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225209233] [2022-07-22 09:47:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:19,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:20,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:20,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225209233] [2022-07-22 09:47:20,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225209233] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:20,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683718363] [2022-07-22 09:47:20,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:47:20,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:20,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:20,541 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) [2022-07-22 09:47:20,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-22 09:47:21,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-22 09:47:21,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:21,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 09:47:21,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:21,920 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 [2022-07-22 09:47:23,340 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:47:23,341 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 [2022-07-22 09:47:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 435 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:23,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:25,083 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 [2022-07-22 09:47:25,092 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 [2022-07-22 09:47:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 420 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:25,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683718363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:25,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:25,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 92 [2022-07-22 09:47:25,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270681089] [2022-07-22 09:47:25,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:25,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-22 09:47:25,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:25,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-22 09:47:25,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=7438, Unknown=1, NotChecked=0, Total=8372 [2022-07-22 09:47:25,140 INFO L87 Difference]: Start difference. First operand 212 states and 235 transitions. Second operand has 92 states, 92 states have (on average 3.217391304347826) internal successors, (296), 92 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:27,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:27,782 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2022-07-22 09:47:27,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-22 09:47:27,783 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.217391304347826) internal successors, (296), 92 states have internal predecessors, (296), 0 states have call successors, (0), 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 118 [2022-07-22 09:47:27,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:27,784 INFO L225 Difference]: With dead ends: 281 [2022-07-22 09:47:27,784 INFO L226 Difference]: Without dead ends: 213 [2022-07-22 09:47:27,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4520 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2225, Invalid=21954, Unknown=1, NotChecked=0, Total=24180 [2022-07-22 09:47:27,785 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:27,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1092 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1046 Invalid, 0 Unknown, 281 Unchecked, 0.4s Time] [2022-07-22 09:47:27,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-22 09:47:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-07-22 09:47:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.1090047393364928) internal successors, (234), 211 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 234 transitions. [2022-07-22 09:47:27,830 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 234 transitions. Word has length 118 [2022-07-22 09:47:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:27,830 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 234 transitions. [2022-07-22 09:47:27,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.217391304347826) internal successors, (296), 92 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 234 transitions. [2022-07-22 09:47:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-22 09:47:27,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:27,831 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:27,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-22 09:47:28,031 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 [2022-07-22 09:47:28,031 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:28,032 INFO L85 PathProgramCache]: Analyzing trace with hash 835124374, now seen corresponding path program 37 times [2022-07-22 09:47:28,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:28,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630574915] [2022-07-22 09:47:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:28,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:28,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:28,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630574915] [2022-07-22 09:47:28,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630574915] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:28,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984028559] [2022-07-22 09:47:28,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:47:28,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:28,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:28,740 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) [2022-07-22 09:47:28,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-22 09:47:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:28,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-22 09:47:28,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:28,982 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 [2022-07-22 09:47:29,052 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:47:29,052 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 [2022-07-22 09:47:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:29,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:29,945 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 16 treesize of output 14 [2022-07-22 09:47:29,947 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 28 treesize of output 24 [2022-07-22 09:47:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:30,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984028559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:30,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:30,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 38] total 56 [2022-07-22 09:47:30,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460606918] [2022-07-22 09:47:30,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:30,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-22 09:47:30,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-22 09:47:30,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2901, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 09:47:30,046 INFO L87 Difference]: Start difference. First operand 212 states and 234 transitions. Second operand has 56 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 56 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:32,079 INFO L93 Difference]: Finished difference Result 297 states and 318 transitions. [2022-07-22 09:47:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-22 09:47:32,079 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 56 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-07-22 09:47:32,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:32,080 INFO L225 Difference]: With dead ends: 297 [2022-07-22 09:47:32,080 INFO L226 Difference]: Without dead ends: 295 [2022-07-22 09:47:32,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 217 SyntacticMatches, 7 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=483, Invalid=10859, Unknown=0, NotChecked=0, Total=11342 [2022-07-22 09:47:32,081 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 150 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 3252 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 3470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 3252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:32,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1617 Invalid, 3470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3252 Invalid, 0 Unknown, 35 Unchecked, 1.1s Time] [2022-07-22 09:47:32,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-22 09:47:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 217. [2022-07-22 09:47:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.1064814814814814) internal successors, (239), 216 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 239 transitions. [2022-07-22 09:47:32,126 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 239 transitions. Word has length 121 [2022-07-22 09:47:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:32,126 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 239 transitions. [2022-07-22 09:47:32,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 56 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:32,126 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 239 transitions. [2022-07-22 09:47:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-22 09:47:32,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:32,127 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:32,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-22 09:47:32,331 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 [2022-07-22 09:47:32,331 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:32,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:32,332 INFO L85 PathProgramCache]: Analyzing trace with hash 312180866, now seen corresponding path program 38 times [2022-07-22 09:47:32,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43718142] [2022-07-22 09:47:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:32,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:33,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:33,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43718142] [2022-07-22 09:47:33,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43718142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:33,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797153092] [2022-07-22 09:47:33,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:47:33,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:33,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:33,037 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) [2022-07-22 09:47:33,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-22 09:47:33,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:47:33,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:33,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-22 09:47:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:33,290 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 [2022-07-22 09:47:33,329 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:47:33,329 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 [2022-07-22 09:47:33,381 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:47:33,381 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 [2022-07-22 09:47:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 2 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:34,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:34,279 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 [2022-07-22 09:47:34,281 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 [2022-07-22 09:47:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 926 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:47:34,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797153092] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:34,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:34,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 39] total 57 [2022-07-22 09:47:34,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778085771] [2022-07-22 09:47:34,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:34,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-22 09:47:34,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:34,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-22 09:47:34,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3007, Unknown=0, NotChecked=0, Total=3192 [2022-07-22 09:47:34,391 INFO L87 Difference]: Start difference. First operand 217 states and 239 transitions. Second operand has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:36,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:36,384 INFO L93 Difference]: Finished difference Result 292 states and 313 transitions. [2022-07-22 09:47:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-22 09:47:36,384 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 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 124 [2022-07-22 09:47:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:36,385 INFO L225 Difference]: With dead ends: 292 [2022-07-22 09:47:36,385 INFO L226 Difference]: Without dead ends: 290 [2022-07-22 09:47:36,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 222 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=424, Invalid=8318, Unknown=0, NotChecked=0, Total=8742 [2022-07-22 09:47:36,386 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 111 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 3701 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 3834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:36,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1677 Invalid, 3834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3701 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 09:47:36,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-07-22 09:47:36,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 216. [2022-07-22 09:47:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.1069767441860465) internal successors, (238), 215 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 238 transitions. [2022-07-22 09:47:36,429 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 238 transitions. Word has length 124 [2022-07-22 09:47:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:36,430 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 238 transitions. [2022-07-22 09:47:36,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:36,430 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 238 transitions. [2022-07-22 09:47:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-22 09:47:36,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:36,431 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:36,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-22 09:47:36,631 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 [2022-07-22 09:47:36,631 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash -820893364, now seen corresponding path program 39 times [2022-07-22 09:47:36,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:36,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879037507] [2022-07-22 09:47:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:36,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:37,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:37,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879037507] [2022-07-22 09:47:37,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879037507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:37,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913439714] [2022-07-22 09:47:37,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:47:37,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:37,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:37,353 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) [2022-07-22 09:47:37,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-22 09:47:38,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-22 09:47:38,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:38,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-22 09:47:38,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:38,800 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 [2022-07-22 09:47:40,275 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:47:40,275 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 [2022-07-22 09:47:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 496 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:40,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:42,032 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 [2022-07-22 09:47:42,036 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 [2022-07-22 09:47:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 480 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:42,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913439714] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:42,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:42,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 97 [2022-07-22 09:47:42,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041164867] [2022-07-22 09:47:42,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:42,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-22 09:47:42,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:42,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-22 09:47:42,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1031, Invalid=8281, Unknown=0, NotChecked=0, Total=9312 [2022-07-22 09:47:42,087 INFO L87 Difference]: Start difference. First operand 216 states and 238 transitions. Second operand has 97 states, 97 states have (on average 3.2371134020618557) internal successors, (314), 97 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:44,427 INFO L93 Difference]: Finished difference Result 289 states and 311 transitions. [2022-07-22 09:47:44,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-22 09:47:44,427 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.2371134020618557) internal successors, (314), 97 states have internal predecessors, (314), 0 states have call successors, (0), 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 125 [2022-07-22 09:47:44,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:44,428 INFO L225 Difference]: With dead ends: 289 [2022-07-22 09:47:44,428 INFO L226 Difference]: Without dead ends: 217 [2022-07-22 09:47:44,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2039, Invalid=20013, Unknown=0, NotChecked=0, Total=22052 [2022-07-22 09:47:44,431 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 96 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:44,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1043 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1078 Invalid, 0 Unknown, 237 Unchecked, 0.4s Time] [2022-07-22 09:47:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-22 09:47:44,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-07-22 09:47:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.1023255813953488) internal successors, (237), 215 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 237 transitions. [2022-07-22 09:47:44,480 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 237 transitions. Word has length 125 [2022-07-22 09:47:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:44,480 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 237 transitions. [2022-07-22 09:47:44,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.2371134020618557) internal successors, (314), 97 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 237 transitions. [2022-07-22 09:47:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-22 09:47:44,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:44,481 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:44,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-22 09:47:44,686 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 [2022-07-22 09:47:44,686 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:44,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:44,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1760220984, now seen corresponding path program 40 times [2022-07-22 09:47:44,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:44,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741993125] [2022-07-22 09:47:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:44,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:45,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:45,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741993125] [2022-07-22 09:47:45,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741993125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:45,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313890015] [2022-07-22 09:47:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:47:45,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:45,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:45,448 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) [2022-07-22 09:47:45,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-22 09:47:45,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:47:45,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:45,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-22 09:47:45,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:45,713 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 [2022-07-22 09:47:45,790 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:47:45,790 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 [2022-07-22 09:47:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:46,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:46,747 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 [2022-07-22 09:47:46,748 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 [2022-07-22 09:47:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:46,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313890015] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:46,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:46,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 40] total 59 [2022-07-22 09:47:46,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772179853] [2022-07-22 09:47:46,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:46,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-22 09:47:46,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:46,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-22 09:47:46,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3233, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 09:47:46,863 INFO L87 Difference]: Start difference. First operand 216 states and 237 transitions. Second operand has 59 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 59 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) [2022-07-22 09:47:49,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:49,199 INFO L93 Difference]: Finished difference Result 305 states and 325 transitions. [2022-07-22 09:47:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-22 09:47:49,199 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 59 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 128 [2022-07-22 09:47:49,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:49,200 INFO L225 Difference]: With dead ends: 305 [2022-07-22 09:47:49,200 INFO L226 Difference]: Without dead ends: 303 [2022-07-22 09:47:49,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 230 SyntacticMatches, 7 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2818 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=510, Invalid=12146, Unknown=0, NotChecked=0, Total=12656 [2022-07-22 09:47:49,201 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 204 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 3817 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 4050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 3817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:49,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1839 Invalid, 4050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 3817 Invalid, 0 Unknown, 5 Unchecked, 1.2s Time] [2022-07-22 09:47:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-22 09:47:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 221. [2022-07-22 09:47:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.1) internal successors, (242), 220 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 242 transitions. [2022-07-22 09:47:49,255 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 242 transitions. Word has length 128 [2022-07-22 09:47:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:49,255 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 242 transitions. [2022-07-22 09:47:49,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 59 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) [2022-07-22 09:47:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 242 transitions. [2022-07-22 09:47:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-22 09:47:49,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:49,257 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:49,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:49,481 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 [2022-07-22 09:47:49,481 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:49,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:49,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1356705332, now seen corresponding path program 41 times [2022-07-22 09:47:49,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:49,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348479134] [2022-07-22 09:47:49,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:49,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:50,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:50,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348479134] [2022-07-22 09:47:50,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348479134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:50,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080937584] [2022-07-22 09:47:50,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:47:50,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:50,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:50,261 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) [2022-07-22 09:47:50,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-22 09:47:51,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-22 09:47:51,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:51,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-22 09:47:51,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:51,176 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 [2022-07-22 09:47:51,213 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:47:51,213 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 [2022-07-22 09:47:51,256 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:47:51,256 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 [2022-07-22 09:47:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 2 proven. 1042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:51,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:52,275 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 [2022-07-22 09:47:52,276 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 [2022-07-22 09:47:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 1043 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:47:52,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080937584] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:52,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:52,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 41] total 60 [2022-07-22 09:47:52,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179660513] [2022-07-22 09:47:52,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:52,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-22 09:47:52,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:52,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-22 09:47:52,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3345, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 09:47:52,389 INFO L87 Difference]: Start difference. First operand 221 states and 242 transitions. Second operand has 60 states, 60 states have (on average 3.45) internal successors, (207), 60 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:54,513 INFO L93 Difference]: Finished difference Result 300 states and 320 transitions. [2022-07-22 09:47:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-22 09:47:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.45) internal successors, (207), 60 states have internal predecessors, (207), 0 states have call successors, (0), 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 131 [2022-07-22 09:47:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:54,515 INFO L225 Difference]: With dead ends: 300 [2022-07-22 09:47:54,515 INFO L226 Difference]: Without dead ends: 298 [2022-07-22 09:47:54,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 235 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=446, Invalid=9256, Unknown=0, NotChecked=0, Total=9702 [2022-07-22 09:47:54,516 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 159 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 4122 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1927 SdHoareTripleChecker+Invalid, 4292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 4122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:54,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1927 Invalid, 4292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 4122 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 09:47:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-22 09:47:54,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 220. [2022-07-22 09:47:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.1004566210045663) internal successors, (241), 219 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 241 transitions. [2022-07-22 09:47:54,574 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 241 transitions. Word has length 131 [2022-07-22 09:47:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:54,574 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 241 transitions. [2022-07-22 09:47:54,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.45) internal successors, (207), 60 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:47:54,575 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 241 transitions. [2022-07-22 09:47:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-22 09:47:54,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:54,576 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:54,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:54,783 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 [2022-07-22 09:47:54,784 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:54,784 INFO L85 PathProgramCache]: Analyzing trace with hash -979115282, now seen corresponding path program 42 times [2022-07-22 09:47:54,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:54,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529421478] [2022-07-22 09:47:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:54,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:55,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:55,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529421478] [2022-07-22 09:47:55,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529421478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:55,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444110632] [2022-07-22 09:47:55,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:47:55,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:55,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:55,561 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) [2022-07-22 09:47:55,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-22 09:47:57,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-22 09:47:57,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:57,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 09:47:57,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:58,344 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 [2022-07-22 09:47:59,913 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:47:59,913 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 [2022-07-22 09:47:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 561 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:59,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:01,788 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 [2022-07-22 09:48:01,790 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 [2022-07-22 09:48:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 544 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:01,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444110632] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:01,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:01,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 102 [2022-07-22 09:48:01,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048807398] [2022-07-22 09:48:01,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:01,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-07-22 09:48:01,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:01,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-07-22 09:48:01,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=9168, Unknown=0, NotChecked=0, Total=10302 [2022-07-22 09:48:01,838 INFO L87 Difference]: Start difference. First operand 220 states and 241 transitions. Second operand has 102 states, 102 states have (on average 3.2549019607843137) internal successors, (332), 102 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:04,355 INFO L93 Difference]: Finished difference Result 297 states and 318 transitions. [2022-07-22 09:48:04,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-22 09:48:04,355 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.2549019607843137) internal successors, (332), 102 states have internal predecessors, (332), 0 states have call successors, (0), 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 132 [2022-07-22 09:48:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:04,356 INFO L225 Difference]: With dead ends: 297 [2022-07-22 09:48:04,356 INFO L226 Difference]: Without dead ends: 221 [2022-07-22 09:48:04,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4344 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2237, Invalid=22255, Unknown=0, NotChecked=0, Total=24492 [2022-07-22 09:48:04,358 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:04,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 1207 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1179 Invalid, 0 Unknown, 281 Unchecked, 0.4s Time] [2022-07-22 09:48:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-22 09:48:04,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-07-22 09:48:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.095890410958904) internal successors, (240), 219 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) [2022-07-22 09:48:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 240 transitions. [2022-07-22 09:48:04,436 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 240 transitions. Word has length 132 [2022-07-22 09:48:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:04,436 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 240 transitions. [2022-07-22 09:48:04,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.2549019607843137) internal successors, (332), 102 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 240 transitions. [2022-07-22 09:48:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 09:48:04,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:04,437 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:04,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:04,645 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 [2022-07-22 09:48:04,645 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:04,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:04,646 INFO L85 PathProgramCache]: Analyzing trace with hash -676072574, now seen corresponding path program 43 times [2022-07-22 09:48:04,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:04,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565239676] [2022-07-22 09:48:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:04,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:05,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:05,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565239676] [2022-07-22 09:48:05,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565239676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:05,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098940442] [2022-07-22 09:48:05,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:48:05,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:05,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:05,403 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) [2022-07-22 09:48:05,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-22 09:48:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:05,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-22 09:48:05,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:05,674 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 [2022-07-22 09:48:05,735 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:48:05,736 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 [2022-07-22 09:48:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:06,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:06,750 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 [2022-07-22 09:48:06,752 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 [2022-07-22 09:48:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:06,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098940442] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:06,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:06,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 42] total 62 [2022-07-22 09:48:06,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240587772] [2022-07-22 09:48:06,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:06,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-22 09:48:06,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:06,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-22 09:48:06,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3583, Unknown=0, NotChecked=0, Total=3782 [2022-07-22 09:48:06,858 INFO L87 Difference]: Start difference. First operand 220 states and 240 transitions. Second operand has 62 states, 62 states have (on average 3.435483870967742) internal successors, (213), 62 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:09,417 INFO L93 Difference]: Finished difference Result 313 states and 332 transitions. [2022-07-22 09:48:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-22 09:48:09,417 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.435483870967742) internal successors, (213), 62 states have internal predecessors, (213), 0 states have call successors, (0), 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 135 [2022-07-22 09:48:09,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:09,418 INFO L225 Difference]: With dead ends: 313 [2022-07-22 09:48:09,418 INFO L226 Difference]: Without dead ends: 311 [2022-07-22 09:48:09,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 243 SyntacticMatches, 7 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=537, Invalid=13505, Unknown=0, NotChecked=0, Total=14042 [2022-07-22 09:48:09,419 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 212 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 4171 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 4416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 4171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:09,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 2009 Invalid, 4416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 4171 Invalid, 0 Unknown, 5 Unchecked, 1.4s Time] [2022-07-22 09:48:09,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-07-22 09:48:09,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 225. [2022-07-22 09:48:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.09375) internal successors, (245), 224 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:09,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 245 transitions. [2022-07-22 09:48:09,488 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 245 transitions. Word has length 135 [2022-07-22 09:48:09,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:09,488 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 245 transitions. [2022-07-22 09:48:09,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.435483870967742) internal successors, (213), 62 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 245 transitions. [2022-07-22 09:48:09,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-07-22 09:48:09,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:09,490 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:09,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:09,700 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 [2022-07-22 09:48:09,700 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:09,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:09,701 INFO L85 PathProgramCache]: Analyzing trace with hash -752014738, now seen corresponding path program 44 times [2022-07-22 09:48:09,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:09,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691567072] [2022-07-22 09:48:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:09,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 0 proven. 1168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:10,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:10,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691567072] [2022-07-22 09:48:10,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691567072] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:10,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521012979] [2022-07-22 09:48:10,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:48:10,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:10,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:10,571 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) [2022-07-22 09:48:10,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-22 09:48:10,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:48:10,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-22 09:48:10,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:10,841 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 [2022-07-22 09:48:10,880 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:48:10,880 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 [2022-07-22 09:48:10,929 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:48:10,929 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 [2022-07-22 09:48:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 2 proven. 1166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:11,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:12,039 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 [2022-07-22 09:48:12,040 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 [2022-07-22 09:48:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 0 proven. 1167 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:48:12,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521012979] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:12,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:12,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 43] total 63 [2022-07-22 09:48:12,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300489790] [2022-07-22 09:48:12,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:12,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-22 09:48:12,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:12,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-22 09:48:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3701, Unknown=0, NotChecked=0, Total=3906 [2022-07-22 09:48:12,152 INFO L87 Difference]: Start difference. First operand 225 states and 245 transitions. Second operand has 63 states, 63 states have (on average 3.4603174603174605) internal successors, (218), 63 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:14,480 INFO L93 Difference]: Finished difference Result 308 states and 327 transitions. [2022-07-22 09:48:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-22 09:48:14,480 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.4603174603174605) internal successors, (218), 63 states have internal predecessors, (218), 0 states have call successors, (0), 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 138 [2022-07-22 09:48:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:14,481 INFO L225 Difference]: With dead ends: 308 [2022-07-22 09:48:14,481 INFO L226 Difference]: Without dead ends: 306 [2022-07-22 09:48:14,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 248 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=468, Invalid=10244, Unknown=0, NotChecked=0, Total=10712 [2022-07-22 09:48:14,482 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 116 mSDsluCounter, 1965 mSDsCounter, 0 mSdLazyCounter, 4471 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 4618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 4471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:14,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 2016 Invalid, 4618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 4471 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 09:48:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-22 09:48:14,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 224. [2022-07-22 09:48:14,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.094170403587444) internal successors, (244), 223 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) [2022-07-22 09:48:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 244 transitions. [2022-07-22 09:48:14,543 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 244 transitions. Word has length 138 [2022-07-22 09:48:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:14,543 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 244 transitions. [2022-07-22 09:48:14,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.4603174603174605) internal successors, (218), 63 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 244 transitions. [2022-07-22 09:48:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-22 09:48:14,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:14,545 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:14,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:14,759 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 [2022-07-22 09:48:14,759 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:14,760 INFO L85 PathProgramCache]: Analyzing trace with hash 915524152, now seen corresponding path program 45 times [2022-07-22 09:48:14,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:14,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799560359] [2022-07-22 09:48:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:14,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:15,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:15,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799560359] [2022-07-22 09:48:15,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799560359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:15,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560998890] [2022-07-22 09:48:15,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:48:15,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:15,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:15,624 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) [2022-07-22 09:48:15,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-22 09:48:17,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-07-22 09:48:17,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:17,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-22 09:48:17,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:17,755 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 [2022-07-22 09:48:19,459 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:48:19,460 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 [2022-07-22 09:48:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 630 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:19,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:21,529 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 [2022-07-22 09:48:21,531 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 [2022-07-22 09:48:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 612 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:21,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560998890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:21,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:21,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 107 [2022-07-22 09:48:21,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53396070] [2022-07-22 09:48:21,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:21,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-22 09:48:21,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-22 09:48:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=10100, Unknown=0, NotChecked=0, Total=11342 [2022-07-22 09:48:21,585 INFO L87 Difference]: Start difference. First operand 224 states and 244 transitions. Second operand has 107 states, 107 states have (on average 3.2710280373831777) internal successors, (350), 107 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:24,453 INFO L93 Difference]: Finished difference Result 305 states and 325 transitions. [2022-07-22 09:48:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-22 09:48:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.2710280373831777) internal successors, (350), 107 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-07-22 09:48:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:24,454 INFO L225 Difference]: With dead ends: 305 [2022-07-22 09:48:24,454 INFO L226 Difference]: Without dead ends: 225 [2022-07-22 09:48:24,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4782 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2444, Invalid=24616, Unknown=0, NotChecked=0, Total=27060 [2022-07-22 09:48:24,456 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 95 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:24,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1027 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1431 Invalid, 0 Unknown, 165 Unchecked, 0.5s Time] [2022-07-22 09:48:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-22 09:48:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2022-07-22 09:48:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0896860986547086) internal successors, (243), 223 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 243 transitions. [2022-07-22 09:48:24,547 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 243 transitions. Word has length 139 [2022-07-22 09:48:24,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:24,548 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 243 transitions. [2022-07-22 09:48:24,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.2710280373831777) internal successors, (350), 107 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 243 transitions. [2022-07-22 09:48:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 09:48:24,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:24,549 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:24,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:24,757 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 [2022-07-22 09:48:24,757 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash -746738908, now seen corresponding path program 46 times [2022-07-22 09:48:24,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:24,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50619602] [2022-07-22 09:48:24,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:24,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:25,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:25,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50619602] [2022-07-22 09:48:25,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50619602] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:25,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777888252] [2022-07-22 09:48:25,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:48:25,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:25,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:25,687 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) [2022-07-22 09:48:25,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-22 09:48:25,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:48:25,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:25,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-22 09:48:25,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:25,966 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 [2022-07-22 09:48:26,039 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:48:26,039 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 [2022-07-22 09:48:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:26,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:27,176 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 [2022-07-22 09:48:27,177 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 [2022-07-22 09:48:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:27,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777888252] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:27,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:27,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 44] total 65 [2022-07-22 09:48:27,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590152358] [2022-07-22 09:48:27,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:27,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-22 09:48:27,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:27,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-22 09:48:27,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3951, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 09:48:27,293 INFO L87 Difference]: Start difference. First operand 224 states and 243 transitions. Second operand has 65 states, 65 states have (on average 3.4461538461538463) internal successors, (224), 65 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:30,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:30,180 INFO L93 Difference]: Finished difference Result 326 states and 344 transitions. [2022-07-22 09:48:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-22 09:48:30,181 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.4461538461538463) internal successors, (224), 65 states have internal predecessors, (224), 0 states have call successors, (0), 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 142 [2022-07-22 09:48:30,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:30,182 INFO L225 Difference]: With dead ends: 326 [2022-07-22 09:48:30,182 INFO L226 Difference]: Without dead ends: 324 [2022-07-22 09:48:30,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 257 SyntacticMatches, 7 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3451 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=595, Invalid=14905, Unknown=0, NotChecked=0, Total=15500 [2022-07-22 09:48:30,186 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 176 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 4704 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 5062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 4704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:30,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 2149 Invalid, 5062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 4704 Invalid, 0 Unknown, 142 Unchecked, 1.6s Time] [2022-07-22 09:48:30,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-07-22 09:48:30,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 229. [2022-07-22 09:48:30,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.087719298245614) internal successors, (248), 228 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 248 transitions. [2022-07-22 09:48:30,260 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 248 transitions. Word has length 142 [2022-07-22 09:48:30,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:30,260 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 248 transitions. [2022-07-22 09:48:30,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.4461538461538463) internal successors, (224), 65 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:30,260 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 248 transitions. [2022-07-22 09:48:30,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-22 09:48:30,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:30,261 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:30,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-07-22 09:48:30,461 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 [2022-07-22 09:48:30,461 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:30,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash -252636488, now seen corresponding path program 47 times [2022-07-22 09:48:30,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:30,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779549699] [2022-07-22 09:48:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:30,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:31,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779549699] [2022-07-22 09:48:31,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779549699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:31,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438658701] [2022-07-22 09:48:31,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:48:31,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:31,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:31,394 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) [2022-07-22 09:48:31,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-22 09:48:32,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-22 09:48:32,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:32,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-22 09:48:32,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:32,276 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 [2022-07-22 09:48:32,315 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:48:32,315 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 [2022-07-22 09:48:32,363 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:48:32,363 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 [2022-07-22 09:48:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 2 proven. 1297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:33,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:33,533 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 [2022-07-22 09:48:33,535 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 [2022-07-22 09:48:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:48:33,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438658701] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:33,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:33,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 45] total 66 [2022-07-22 09:48:33,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537176377] [2022-07-22 09:48:33,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:33,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-22 09:48:33,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:33,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-22 09:48:33,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4075, Unknown=0, NotChecked=0, Total=4290 [2022-07-22 09:48:33,658 INFO L87 Difference]: Start difference. First operand 229 states and 248 transitions. Second operand has 66 states, 66 states have (on average 3.4696969696969697) internal successors, (229), 66 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:36,332 INFO L93 Difference]: Finished difference Result 316 states and 334 transitions. [2022-07-22 09:48:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-22 09:48:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4696969696969697) internal successors, (229), 66 states have internal predecessors, (229), 0 states have call successors, (0), 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 145 [2022-07-22 09:48:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:36,333 INFO L225 Difference]: With dead ends: 316 [2022-07-22 09:48:36,334 INFO L226 Difference]: Without dead ends: 314 [2022-07-22 09:48:36,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 261 SyntacticMatches, 9 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=490, Invalid=11282, Unknown=0, NotChecked=0, Total=11772 [2022-07-22 09:48:36,334 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 158 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 5004 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 2204 SdHoareTripleChecker+Invalid, 5186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 5004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:36,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 2204 Invalid, 5186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 5004 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 09:48:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-22 09:48:36,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 228. [2022-07-22 09:48:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.0881057268722467) internal successors, (247), 227 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) [2022-07-22 09:48:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 247 transitions. [2022-07-22 09:48:36,433 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 247 transitions. Word has length 145 [2022-07-22 09:48:36,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:36,434 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 247 transitions. [2022-07-22 09:48:36,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4696969696969697) internal successors, (229), 66 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 247 transitions. [2022-07-22 09:48:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-22 09:48:36,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:36,435 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:36,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:36,651 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 [2022-07-22 09:48:36,651 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:36,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1100144858, now seen corresponding path program 48 times [2022-07-22 09:48:36,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:36,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926426481] [2022-07-22 09:48:36,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:36,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:37,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:37,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926426481] [2022-07-22 09:48:37,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926426481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:37,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881991262] [2022-07-22 09:48:37,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:48:37,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:37,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:37,553 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) [2022-07-22 09:48:37,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-22 09:48:42,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-07-22 09:48:42,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:42,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 09:48:42,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:43,242 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 [2022-07-22 09:48:45,121 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:48:45,121 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 [2022-07-22 09:48:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 703 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:45,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:47,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-07-22 09:48:47,391 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 37 treesize of output 30 [2022-07-22 09:48:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 544 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:47,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881991262] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:47,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:47,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 112 [2022-07-22 09:48:47,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664579889] [2022-07-22 09:48:47,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:47,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-07-22 09:48:47,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:47,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-07-22 09:48:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1322, Invalid=11110, Unknown=0, NotChecked=0, Total=12432 [2022-07-22 09:48:47,447 INFO L87 Difference]: Start difference. First operand 228 states and 247 transitions. Second operand has 112 states, 112 states have (on average 3.2857142857142856) internal successors, (368), 112 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:51,554 INFO L93 Difference]: Finished difference Result 313 states and 332 transitions. [2022-07-22 09:48:51,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-22 09:48:51,554 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.2857142857142856) internal successors, (368), 112 states have internal predecessors, (368), 0 states have call successors, (0), 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 146 [2022-07-22 09:48:51,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:51,555 INFO L225 Difference]: With dead ends: 313 [2022-07-22 09:48:51,555 INFO L226 Difference]: Without dead ends: 229 [2022-07-22 09:48:51,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6916 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3225, Invalid=33831, Unknown=0, NotChecked=0, Total=37056 [2022-07-22 09:48:51,557 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 114 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:51,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1490 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1503 Invalid, 0 Unknown, 459 Unchecked, 0.5s Time] [2022-07-22 09:48:51,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-22 09:48:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-07-22 09:48:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.0837004405286343) internal successors, (246), 227 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) [2022-07-22 09:48:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 246 transitions. [2022-07-22 09:48:51,654 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 246 transitions. Word has length 146 [2022-07-22 09:48:51,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:51,654 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 246 transitions. [2022-07-22 09:48:51,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.2857142857142856) internal successors, (368), 112 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:51,654 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 246 transitions. [2022-07-22 09:48:51,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-22 09:48:51,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:51,655 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:51,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:51,863 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 [2022-07-22 09:48:51,863 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:51,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:51,864 INFO L85 PathProgramCache]: Analyzing trace with hash -946172518, now seen corresponding path program 3 times [2022-07-22 09:48:51,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:51,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128980884] [2022-07-22 09:48:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:51,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 69 proven. 1751 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 09:48:52,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:52,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128980884] [2022-07-22 09:48:52,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128980884] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:52,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102063204] [2022-07-22 09:48:52,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:48:52,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:52,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:52,385 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) [2022-07-22 09:48:52,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-22 09:49:01,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2022-07-22 09:49:01,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:01,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 09:49:01,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 69 proven. 1751 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 09:49:01,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 69 proven. 1751 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 09:49:03,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102063204] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:03,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:49:03,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2022-07-22 09:49:03,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256035496] [2022-07-22 09:49:03,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:03,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-22 09:49:03,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:03,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-22 09:49:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2022-07-22 09:49:03,236 INFO L87 Difference]: Start difference. First operand 228 states and 246 transitions. Second operand has 73 states, 73 states have (on average 3.1095890410958904) internal successors, (227), 73 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) [2022-07-22 09:49:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:04,344 INFO L93 Difference]: Finished difference Result 780 states and 872 transitions. [2022-07-22 09:49:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-22 09:49:04,345 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.1095890410958904) internal successors, (227), 73 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 147 [2022-07-22 09:49:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:04,346 INFO L225 Difference]: With dead ends: 780 [2022-07-22 09:49:04,346 INFO L226 Difference]: Without dead ends: 696 [2022-07-22 09:49:04,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2022-07-22 09:49:04,347 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1294 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:04,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 286 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 09:49:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-07-22 09:49:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 336. [2022-07-22 09:49:04,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.164179104477612) internal successors, (390), 335 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 390 transitions. [2022-07-22 09:49:04,470 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 390 transitions. Word has length 147 [2022-07-22 09:49:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:04,470 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 390 transitions. [2022-07-22 09:49:04,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.1095890410958904) internal successors, (227), 73 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) [2022-07-22 09:49:04,470 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 390 transitions. [2022-07-22 09:49:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-22 09:49:04,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:04,471 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:04,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-22 09:49:04,685 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 [2022-07-22 09:49:04,685 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:04,685 INFO L85 PathProgramCache]: Analyzing trace with hash 555769454, now seen corresponding path program 49 times [2022-07-22 09:49:04,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:04,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861183964] [2022-07-22 09:49:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:04,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:05,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:05,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861183964] [2022-07-22 09:49:05,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861183964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:05,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512718551] [2022-07-22 09:49:05,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:49:05,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:05,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:05,596 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) [2022-07-22 09:49:05,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-22 09:49:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:05,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-22 09:49:05,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:05,917 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 [2022-07-22 09:49:05,982 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:49:05,982 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 [2022-07-22 09:49:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:06,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:07,181 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 [2022-07-22 09:49:07,183 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 [2022-07-22 09:49:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:07,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512718551] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:07,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:49:07,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 46] total 68 [2022-07-22 09:49:07,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232603668] [2022-07-22 09:49:07,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:07,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-22 09:49:07,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:07,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-22 09:49:07,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=4337, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 09:49:07,306 INFO L87 Difference]: Start difference. First operand 336 states and 390 transitions. Second operand has 68 states, 68 states have (on average 3.4558823529411766) internal successors, (235), 68 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:10,489 INFO L93 Difference]: Finished difference Result 437 states and 490 transitions. [2022-07-22 09:49:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-07-22 09:49:10,490 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.4558823529411766) internal successors, (235), 68 states have internal predecessors, (235), 0 states have call successors, (0), 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 149 [2022-07-22 09:49:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:10,491 INFO L225 Difference]: With dead ends: 437 [2022-07-22 09:49:10,491 INFO L226 Difference]: Without dead ends: 435 [2022-07-22 09:49:10,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 269 SyntacticMatches, 7 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3790 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=591, Invalid=16439, Unknown=0, NotChecked=0, Total=17030 [2022-07-22 09:49:10,492 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 180 mSDsluCounter, 2448 mSDsCounter, 0 mSdLazyCounter, 5415 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2503 SdHoareTripleChecker+Invalid, 5684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 5415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:10,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 2503 Invalid, 5684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 5415 Invalid, 0 Unknown, 43 Unchecked, 1.8s Time] [2022-07-22 09:49:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-07-22 09:49:10,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 341. [2022-07-22 09:49:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.161764705882353) internal successors, (395), 340 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 395 transitions. [2022-07-22 09:49:10,586 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 395 transitions. Word has length 149 [2022-07-22 09:49:10,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:10,586 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 395 transitions. [2022-07-22 09:49:10,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.4558823529411766) internal successors, (235), 68 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 395 transitions. [2022-07-22 09:49:10,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-22 09:49:10,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:10,587 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:10,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-22 09:49:10,794 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 [2022-07-22 09:49:10,795 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:10,795 INFO L85 PathProgramCache]: Analyzing trace with hash 864618586, now seen corresponding path program 50 times [2022-07-22 09:49:10,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:10,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780489201] [2022-07-22 09:49:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:10,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 1437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:11,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:11,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780489201] [2022-07-22 09:49:11,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780489201] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:11,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680100880] [2022-07-22 09:49:11,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:49:11,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:11,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:11,744 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) [2022-07-22 09:49:11,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-22 09:49:11,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:49:11,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:11,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-22 09:49:11,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:12,048 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 [2022-07-22 09:49:12,088 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:49:12,089 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 [2022-07-22 09:49:12,135 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:49:12,136 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 [2022-07-22 09:49:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 2 proven. 1435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:13,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:13,374 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 [2022-07-22 09:49:13,376 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 [2022-07-22 09:49:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 1436 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:49:13,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680100880] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:13,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:49:13,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 47] total 69 [2022-07-22 09:49:13,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618458132] [2022-07-22 09:49:13,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:13,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-22 09:49:13,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:13,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-22 09:49:13,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4467, Unknown=0, NotChecked=0, Total=4692 [2022-07-22 09:49:13,502 INFO L87 Difference]: Start difference. First operand 341 states and 395 transitions. Second operand has 69 states, 69 states have (on average 3.4782608695652173) internal successors, (240), 69 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) [2022-07-22 09:49:16,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:16,333 INFO L93 Difference]: Finished difference Result 432 states and 485 transitions. [2022-07-22 09:49:16,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-22 09:49:16,333 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.4782608695652173) internal successors, (240), 69 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 152 [2022-07-22 09:49:16,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:16,334 INFO L225 Difference]: With dead ends: 432 [2022-07-22 09:49:16,334 INFO L226 Difference]: Without dead ends: 430 [2022-07-22 09:49:16,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 274 SyntacticMatches, 9 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2563 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=512, Invalid=12370, Unknown=0, NotChecked=0, Total=12882 [2022-07-22 09:49:16,335 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 174 mSDsluCounter, 2295 mSDsCounter, 0 mSdLazyCounter, 5385 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2350 SdHoareTripleChecker+Invalid, 5589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 5385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:16,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 2350 Invalid, 5589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 5385 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 09:49:16,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-07-22 09:49:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 340. [2022-07-22 09:49:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.1622418879056047) internal successors, (394), 339 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:16,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 394 transitions. [2022-07-22 09:49:16,453 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 394 transitions. Word has length 152 [2022-07-22 09:49:16,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:16,453 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 394 transitions. [2022-07-22 09:49:16,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.4782608695652173) internal successors, (240), 69 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) [2022-07-22 09:49:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 394 transitions. [2022-07-22 09:49:16,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-22 09:49:16,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:16,454 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:16,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-22 09:49:16,654 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 [2022-07-22 09:49:16,654 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash -860430556, now seen corresponding path program 51 times [2022-07-22 09:49:16,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:16,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349228184] [2022-07-22 09:49:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:16,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:17,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:17,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349228184] [2022-07-22 09:49:17,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349228184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:17,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824317718] [2022-07-22 09:49:17,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:49:17,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:17,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:17,563 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) [2022-07-22 09:49:17,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-22 09:49:22,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-07-22 09:49:22,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:22,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-22 09:49:22,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:23,389 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 [2022-07-22 09:49:25,376 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 09:49:25,376 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 [2022-07-22 09:49:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 780 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:25,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:27,814 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 [2022-07-22 09:49:27,816 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 [2022-07-22 09:49:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 760 proven. 691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:27,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824317718] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:27,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:49:27,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 117 [2022-07-22 09:49:27,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126816375] [2022-07-22 09:49:27,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:27,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-07-22 09:49:27,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:27,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-07-22 09:49:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1473, Invalid=12099, Unknown=0, NotChecked=0, Total=13572 [2022-07-22 09:49:27,882 INFO L87 Difference]: Start difference. First operand 340 states and 394 transitions. Second operand has 117 states, 117 states have (on average 3.299145299145299) internal successors, (386), 117 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:32,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:32,269 INFO L93 Difference]: Finished difference Result 429 states and 483 transitions. [2022-07-22 09:49:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-07-22 09:49:32,269 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.299145299145299) internal successors, (386), 117 states have internal predecessors, (386), 0 states have call successors, (0), 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 153 [2022-07-22 09:49:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:32,271 INFO L225 Difference]: With dead ends: 429 [2022-07-22 09:49:32,271 INFO L226 Difference]: Without dead ends: 341 [2022-07-22 09:49:32,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7440 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3485, Invalid=36715, Unknown=0, NotChecked=0, Total=40200 [2022-07-22 09:49:32,273 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 100 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 702 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:32,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1446 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1576 Invalid, 0 Unknown, 702 Unchecked, 0.5s Time] [2022-07-22 09:49:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-07-22 09:49:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2022-07-22 09:49:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.1592920353982301) internal successors, (393), 339 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:32,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 393 transitions. [2022-07-22 09:49:32,390 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 393 transitions. Word has length 153 [2022-07-22 09:49:32,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:32,390 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 393 transitions. [2022-07-22 09:49:32,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.299145299145299) internal successors, (386), 117 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:32,390 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 393 transitions. [2022-07-22 09:49:32,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-22 09:49:32,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:32,391 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:32,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-07-22 09:49:32,599 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 [2022-07-22 09:49:32,600 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash -979324144, now seen corresponding path program 52 times [2022-07-22 09:49:32,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:32,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805595096] [2022-07-22 09:49:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:32,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:33,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:33,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805595096] [2022-07-22 09:49:33,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805595096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:33,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118570564] [2022-07-22 09:49:33,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:49:33,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:33,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:33,659 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) [2022-07-22 09:49:33,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-22 09:49:33,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:49:33,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:33,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-22 09:49:33,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:33,973 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 [2022-07-22 09:49:34,050 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 09:49:34,050 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