./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mbpr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/mbpr5.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 5503daab190ef8b57bdc3b49ed300bfd661cba05f76774439c2c92cf1668f08b --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:38:04,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:38:04,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:38:04,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:38:04,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:38:04,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:38:04,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:38:04,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:38:04,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:38:04,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:38:04,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:38:04,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:38:04,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:38:04,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:38:04,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:38:04,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:38:04,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:38:04,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:38:04,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:38:04,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:38:04,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:38:04,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:38:04,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:38:04,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:38:04,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:38:04,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:38:04,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:38:04,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:38:04,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:38:04,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:38:04,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:38:04,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:38:04,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:38:04,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:38:04,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:38:04,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:38:04,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:38:04,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:38:04,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:38:04,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:38:04,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:38:04,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:38:04,352 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:38:04,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:38:04,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:38:04,353 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:38:04,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:38:04,354 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:38:04,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:38:04,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:38:04,355 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:38:04,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:38:04,356 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:38:04,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:38:04,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:38:04,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:38:04,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:38:04,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:38:04,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:38:04,357 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:38:04,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:38:04,358 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:38:04,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:38:04,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:38:04,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:38:04,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:38:04,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:38:04,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:38:04,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:38:04,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:38:04,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:38:04,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:38:04,360 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:38:04,361 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:38:04,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:38:04,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:38:04,361 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5503daab190ef8b57bdc3b49ed300bfd661cba05f76774439c2c92cf1668f08b [2021-12-15 08:38:04,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:38:04,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:38:04,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:38:04,624 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:38:04,624 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:38:04,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mbpr5.c [2021-12-15 08:38:04,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f89bcb16/218447b0a68c465785d6baf40cd9d850/FLAGca42e1b30 [2021-12-15 08:38:05,091 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:38:05,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr5.c [2021-12-15 08:38:05,097 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f89bcb16/218447b0a68c465785d6baf40cd9d850/FLAGca42e1b30 [2021-12-15 08:38:05,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f89bcb16/218447b0a68c465785d6baf40cd9d850 [2021-12-15 08:38:05,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:38:05,110 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:38:05,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:38:05,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:38:05,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:38:05,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:38:05" (1/1) ... [2021-12-15 08:38:05,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ccdc9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05, skipping insertion in model container [2021-12-15 08:38:05,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:38:05" (1/1) ... [2021-12-15 08:38:05,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:38:05,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:38:05,252 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/mbpr5.c[396,409] [2021-12-15 08:38:05,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:38:05,313 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:38:05,322 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/mbpr5.c[396,409] [2021-12-15 08:38:05,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:38:05,357 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:38:05,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05 WrapperNode [2021-12-15 08:38:05,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:38:05,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:38:05,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:38:05,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:38:05,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05" (1/1) ... [2021-12-15 08:38:05,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05" (1/1) ... [2021-12-15 08:38:05,393 INFO L137 Inliner]: procedures = 15, calls = 64, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 173 [2021-12-15 08:38:05,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:38:05,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:38:05,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:38:05,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:38:05,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05" (1/1) ... [2021-12-15 08:38:05,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05" (1/1) ... [2021-12-15 08:38:05,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05" (1/1) ... [2021-12-15 08:38:05,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05" (1/1) ... [2021-12-15 08:38:05,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05" (1/1) ... [2021-12-15 08:38:05,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05" (1/1) ... [2021-12-15 08:38:05,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05" (1/1) ... [2021-12-15 08:38:05,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:38:05,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:38:05,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:38:05,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:38:05,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05" (1/1) ... [2021-12-15 08:38:05,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:38:05,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:38:05,452 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) [2021-12-15 08:38:05,461 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 [2021-12-15 08:38:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:38:05,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:38:05,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:38:05,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:38:05,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:38:05,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:38:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:38:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:38:05,556 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:38:05,557 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:38:05,780 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:38:05,791 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:38:05,792 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-15 08:38:05,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:38:05 BoogieIcfgContainer [2021-12-15 08:38:05,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:38:05,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:38:05,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:38:05,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:38:05,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:38:05" (1/3) ... [2021-12-15 08:38:05,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630f5f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:38:05, skipping insertion in model container [2021-12-15 08:38:05,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:38:05" (2/3) ... [2021-12-15 08:38:05,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630f5f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:38:05, skipping insertion in model container [2021-12-15 08:38:05,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:38:05" (3/3) ... [2021-12-15 08:38:05,802 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr5.c [2021-12-15 08:38:05,805 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:38:05,805 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:38:05,858 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:38:05,868 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:38:05,869 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:38:05,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 43 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) [2021-12-15 08:38:05,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 08:38:05,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:05,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:05,901 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:05,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:05,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1087925893, now seen corresponding path program 1 times [2021-12-15 08:38:05,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:05,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571771050] [2021-12-15 08:38:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:05,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:38:06,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:06,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571771050] [2021-12-15 08:38:06,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571771050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:38:06,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:38:06,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:38:06,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222318014] [2021-12-15 08:38:06,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:38:06,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:38:06,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:38:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:38:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:38:06,136 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 43 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) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 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) [2021-12-15 08:38:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:38:06,158 INFO L93 Difference]: Finished difference Result 83 states and 122 transitions. [2021-12-15 08:38:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:38:06,160 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 08:38:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:38:06,166 INFO L225 Difference]: With dead ends: 83 [2021-12-15 08:38:06,166 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 08:38:06,169 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:38:06,174 INFO L933 BasicCegarLoop]: 57 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, 57 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 [2021-12-15 08:38:06,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:38:06,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 08:38:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-15 08:38:06,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:06,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-12-15 08:38:06,213 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 21 [2021-12-15 08:38:06,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:38:06,214 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-12-15 08:38:06,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 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) [2021-12-15 08:38:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-12-15 08:38:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 08:38:06,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:06,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:06,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:38:06,218 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:06,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash -30028973, now seen corresponding path program 1 times [2021-12-15 08:38:06,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:06,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177116100] [2021-12-15 08:38:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:06,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:38:06,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:06,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177116100] [2021-12-15 08:38:06,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177116100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:38:06,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:38:06,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:38:06,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033327583] [2021-12-15 08:38:06,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:38:06,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:38:06,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:38:06,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:38:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:38:06,365 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:06,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:38:06,402 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-12-15 08:38:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 08:38:06,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 08:38:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:38:06,404 INFO L225 Difference]: With dead ends: 48 [2021-12-15 08:38:06,404 INFO L226 Difference]: Without dead ends: 46 [2021-12-15 08:38:06,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:38:06,408 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 9 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:38:06,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 140 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:38:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-15 08:38:06,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-12-15 08:38:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 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) [2021-12-15 08:38:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-12-15 08:38:06,420 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 21 [2021-12-15 08:38:06,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:38:06,421 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-12-15 08:38:06,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:06,422 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-12-15 08:38:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 08:38:06,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:06,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:06,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:38:06,424 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:06,425 INFO L85 PathProgramCache]: Analyzing trace with hash -29969391, now seen corresponding path program 1 times [2021-12-15 08:38:06,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:06,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101465785] [2021-12-15 08:38:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:06,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:38:06,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:06,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101465785] [2021-12-15 08:38:06,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101465785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:38:06,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:38:06,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 08:38:06,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757593741] [2021-12-15 08:38:06,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:38:06,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 08:38:06,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:38:06,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 08:38:06,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:38:06,616 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2021-12-15 08:38:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:38:06,752 INFO L93 Difference]: Finished difference Result 92 states and 122 transitions. [2021-12-15 08:38:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 08:38:06,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 08:38:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:38:06,753 INFO L225 Difference]: With dead ends: 92 [2021-12-15 08:38:06,754 INFO L226 Difference]: Without dead ends: 61 [2021-12-15 08:38:06,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:38:06,756 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:38:06,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:38:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-15 08:38:06,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2021-12-15 08:38:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-12-15 08:38:06,765 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2021-12-15 08:38:06,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:38:06,765 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-12-15 08:38:06,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2021-12-15 08:38:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-12-15 08:38:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 08:38:06,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:06,766 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:06,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:38:06,766 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:06,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:06,767 INFO L85 PathProgramCache]: Analyzing trace with hash -175217928, now seen corresponding path program 1 times [2021-12-15 08:38:06,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:06,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942264777] [2021-12-15 08:38:06,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:06,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:38:06,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:06,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942264777] [2021-12-15 08:38:06,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942264777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:38:06,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:38:06,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:38:06,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085689573] [2021-12-15 08:38:06,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:38:06,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:38:06,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:38:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:38:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:38:06,865 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:38:06,881 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-12-15 08:38:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:38:06,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-15 08:38:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:38:06,882 INFO L225 Difference]: With dead ends: 61 [2021-12-15 08:38:06,883 INFO L226 Difference]: Without dead ends: 46 [2021-12-15 08:38:06,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:38:06,884 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:38:06,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 40 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:38:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-15 08:38:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-15 08:38:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2021-12-15 08:38:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-12-15 08:38:06,890 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 41 [2021-12-15 08:38:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:38:06,891 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-12-15 08:38:06,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-12-15 08:38:06,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 08:38:06,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:06,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:06,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 08:38:06,893 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:06,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:06,893 INFO L85 PathProgramCache]: Analyzing trace with hash -568244938, now seen corresponding path program 1 times [2021-12-15 08:38:06,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:06,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929405668] [2021-12-15 08:38:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:06,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:38:07,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:07,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929405668] [2021-12-15 08:38:07,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929405668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:38:07,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828939894] [2021-12-15 08:38:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:07,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:07,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:38:07,440 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) [2021-12-15 08:38:07,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:38:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:07,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-15 08:38:07,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:38:07,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:38:07,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-15 08:38:07,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:07,922 INFO L388 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 0 case distinctions, treesize of input 51 treesize of output 40 [2021-12-15 08:38:07,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:07,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2021-12-15 08:38:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:08,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2021-12-15 08:38:08,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:08,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2021-12-15 08:38:08,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:08,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:08,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:38:08,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 50 [2021-12-15 08:38:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:38:08,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:38:08,845 INFO L388 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 31 treesize of output 27 [2021-12-15 08:38:08,848 INFO L388 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 55 treesize of output 51 [2021-12-15 08:38:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:38:08,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828939894] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:38:08,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:38:08,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 23 [2021-12-15 08:38:08,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264007324] [2021-12-15 08:38:08,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:38:08,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 08:38:08,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:38:08,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 08:38:08,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-12-15 08:38:08,988 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:09,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:38:09,712 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2021-12-15 08:38:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 08:38:09,712 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-15 08:38:09,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:38:09,713 INFO L225 Difference]: With dead ends: 126 [2021-12-15 08:38:09,713 INFO L226 Difference]: Without dead ends: 87 [2021-12-15 08:38:09,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 71 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 08:38:09,715 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 285 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:38:09,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 110 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:38:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-15 08:38:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 48. [2021-12-15 08:38:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-12-15 08:38:09,721 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 41 [2021-12-15 08:38:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:38:09,721 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-12-15 08:38:09,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-12-15 08:38:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 08:38:09,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:09,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:09,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 08:38:09,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:09,947 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:09,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1692770569, now seen corresponding path program 1 times [2021-12-15 08:38:09,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:09,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601634761] [2021-12-15 08:38:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:09,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:38:10,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:10,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601634761] [2021-12-15 08:38:10,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601634761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:38:10,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69557663] [2021-12-15 08:38:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:10,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:10,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:38:10,222 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) [2021-12-15 08:38:10,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:38:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-15 08:38:10,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:38:10,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:38:10,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-15 08:38:10,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:10,605 INFO L388 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 0 case distinctions, treesize of input 53 treesize of output 42 [2021-12-15 08:38:10,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-12-15 08:38:10,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:10,678 INFO L388 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 0 case distinctions, treesize of input 53 treesize of output 42 [2021-12-15 08:38:10,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-12-15 08:38:10,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:10,778 INFO L388 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 0 case distinctions, treesize of input 62 treesize of output 49 [2021-12-15 08:38:10,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:10,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 50 [2021-12-15 08:38:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:38:10,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:38:11,453 INFO L388 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 35 treesize of output 31 [2021-12-15 08:38:11,456 INFO L388 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 67 treesize of output 59 [2021-12-15 08:38:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:38:11,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69557663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:38:11,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:38:11,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2021-12-15 08:38:11,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699571048] [2021-12-15 08:38:11,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:38:11,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 08:38:11,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:38:11,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 08:38:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-12-15 08:38:11,638 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:12,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:38:12,391 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2021-12-15 08:38:12,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 08:38:12,392 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 08:38:12,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:38:12,393 INFO L225 Difference]: With dead ends: 119 [2021-12-15 08:38:12,393 INFO L226 Difference]: Without dead ends: 84 [2021-12-15 08:38:12,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 81 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2021-12-15 08:38:12,394 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 340 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:38:12,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 120 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:38:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-15 08:38:12,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-12-15 08:38:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-12-15 08:38:12,401 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 47 [2021-12-15 08:38:12,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:38:12,401 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-12-15 08:38:12,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-12-15 08:38:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-15 08:38:12,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:12,402 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:12,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:38:12,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 08:38:12,617 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:12,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:12,618 INFO L85 PathProgramCache]: Analyzing trace with hash 964465308, now seen corresponding path program 2 times [2021-12-15 08:38:12,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:12,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139715009] [2021-12-15 08:38:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:12,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:38:12,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:12,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139715009] [2021-12-15 08:38:12,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139715009] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:38:12,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651213929] [2021-12-15 08:38:12,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:38:12,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:12,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:38:12,900 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) [2021-12-15 08:38:12,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:38:13,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:38:13,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:38:13,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-15 08:38:13,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:38:13,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:38:13,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-15 08:38:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:13,294 INFO L388 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 0 case distinctions, treesize of input 87 treesize of output 68 [2021-12-15 08:38:13,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2021-12-15 08:38:13,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:13,374 INFO L388 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 0 case distinctions, treesize of input 57 treesize of output 48 [2021-12-15 08:38:13,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:13,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2021-12-15 08:38:13,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 08:38:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:38:13,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:38:13,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:38:13,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 08:38:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:38:13,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651213929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:38:13,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:38:13,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-15 08:38:13,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893799538] [2021-12-15 08:38:13,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:38:13,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 08:38:13,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:38:13,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 08:38:13,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-12-15 08:38:13,930 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 22 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) [2021-12-15 08:38:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:38:14,503 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2021-12-15 08:38:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 08:38:14,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 22 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) Word has length 53 [2021-12-15 08:38:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:38:14,506 INFO L225 Difference]: With dead ends: 156 [2021-12-15 08:38:14,506 INFO L226 Difference]: Without dead ends: 121 [2021-12-15 08:38:14,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=883, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 08:38:14,507 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 248 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 08:38:14,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 139 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 08:38:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-15 08:38:14,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 60. [2021-12-15 08:38:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-12-15 08:38:14,514 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 53 [2021-12-15 08:38:14,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:38:14,514 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-12-15 08:38:14,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 22 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) [2021-12-15 08:38:14,515 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-12-15 08:38:14,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 08:38:14,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:14,518 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:14,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:38:14,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:14,745 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:14,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:14,746 INFO L85 PathProgramCache]: Analyzing trace with hash -477181457, now seen corresponding path program 3 times [2021-12-15 08:38:14,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:14,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495624416] [2021-12-15 08:38:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:14,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:38:15,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495624416] [2021-12-15 08:38:15,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495624416] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:38:15,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932734334] [2021-12-15 08:38:15,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:38:15,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:15,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:38:15,044 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) [2021-12-15 08:38:15,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:38:15,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 08:38:15,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:38:15,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-15 08:38:15,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:38:15,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:38:15,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-15 08:38:15,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:15,629 INFO L388 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 0 case distinctions, treesize of input 92 treesize of output 73 [2021-12-15 08:38:15,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:15,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2021-12-15 08:38:15,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 08:38:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:38:15,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:38:16,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:38:16,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 08:38:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:38:16,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932734334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:38:16,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:38:16,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-15 08:38:16,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051412719] [2021-12-15 08:38:16,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:38:16,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 08:38:16,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:38:16,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 08:38:16,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-12-15 08:38:16,223 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:38:16,779 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2021-12-15 08:38:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 08:38:16,779 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-15 08:38:16,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:38:16,780 INFO L225 Difference]: With dead ends: 146 [2021-12-15 08:38:16,780 INFO L226 Difference]: Without dead ends: 111 [2021-12-15 08:38:16,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 103 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 08:38:16,782 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 206 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 08:38:16,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 205 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 08:38:16,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-15 08:38:16,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 66. [2021-12-15 08:38:16,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2021-12-15 08:38:16,788 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 59 [2021-12-15 08:38:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:38:16,789 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2021-12-15 08:38:16,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:16,789 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2021-12-15 08:38:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 08:38:16,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:16,790 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:16,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 08:38:17,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:17,011 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash -712968446, now seen corresponding path program 4 times [2021-12-15 08:38:17,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:17,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83325345] [2021-12-15 08:38:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:17,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:38:17,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:17,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83325345] [2021-12-15 08:38:17,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83325345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:38:17,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629819525] [2021-12-15 08:38:17,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:38:17,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:17,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:38:17,139 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) [2021-12-15 08:38:17,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:38:17,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:38:17,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:38:17,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-15 08:38:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:38:17,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:38:17,343 INFO L388 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 0 case distinctions, treesize of input 53 treesize of output 42 [2021-12-15 08:38:17,425 INFO L354 Elim1Store]: treesize reduction 584, result has 8.3 percent of original size [2021-12-15 08:38:17,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 94 [2021-12-15 08:38:17,455 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-12-15 08:38:17,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 45 [2021-12-15 08:38:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:38:17,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:38:17,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:38:17,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 08:38:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:38:17,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629819525] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:38:17,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:38:17,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2021-12-15 08:38:17,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468017774] [2021-12-15 08:38:17,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:38:17,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 08:38:17,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:38:17,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 08:38:17,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:38:17,744 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:38:18,143 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2021-12-15 08:38:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 08:38:18,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-15 08:38:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:38:18,144 INFO L225 Difference]: With dead ends: 116 [2021-12-15 08:38:18,144 INFO L226 Difference]: Without dead ends: 114 [2021-12-15 08:38:18,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 121 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-12-15 08:38:18,145 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 136 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:38:18,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 178 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:38:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-15 08:38:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2021-12-15 08:38:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:18,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2021-12-15 08:38:18,161 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 65 [2021-12-15 08:38:18,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:38:18,162 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2021-12-15 08:38:18,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:18,162 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2021-12-15 08:38:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 08:38:18,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:18,163 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:18,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 08:38:18,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:18,375 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:18,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1869859285, now seen corresponding path program 5 times [2021-12-15 08:38:18,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:18,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720441550] [2021-12-15 08:38:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:18,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:38:18,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:18,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720441550] [2021-12-15 08:38:18,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720441550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:38:18,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754501677] [2021-12-15 08:38:18,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 08:38:18,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:18,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:38:18,625 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) [2021-12-15 08:38:18,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:38:22,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-15 08:38:22,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:38:22,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-15 08:38:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:38:23,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:38:23,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:23,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:23,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:23,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:23,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:23,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:23,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:23,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:23,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:23,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:23,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-15 08:38:23,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 08:38:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 08:38:23,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:38:23,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:38:23,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 08:38:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 08:38:23,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754501677] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:38:23,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:38:23,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2021-12-15 08:38:23,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574855349] [2021-12-15 08:38:23,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:38:23,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-15 08:38:23,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:38:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-15 08:38:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-12-15 08:38:23,732 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 30 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:38:24,661 INFO L93 Difference]: Finished difference Result 236 states and 261 transitions. [2021-12-15 08:38:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 08:38:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 30 states have internal predecessors, (194), 0 states have call successors, (0), 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 71 [2021-12-15 08:38:24,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:38:24,662 INFO L225 Difference]: With dead ends: 236 [2021-12-15 08:38:24,662 INFO L226 Difference]: Without dead ends: 121 [2021-12-15 08:38:24,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=2036, Unknown=0, NotChecked=0, Total=2450 [2021-12-15 08:38:24,664 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 566 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 08:38:24,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 384 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 08:38:24,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-15 08:38:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 92. [2021-12-15 08:38:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.0769230769230769) internal successors, (98), 91 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) [2021-12-15 08:38:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2021-12-15 08:38:24,672 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 71 [2021-12-15 08:38:24,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:38:24,672 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2021-12-15 08:38:24,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 30 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:24,673 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2021-12-15 08:38:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-15 08:38:24,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:24,674 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:24,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:38:24,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:24,884 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:24,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1771668984, now seen corresponding path program 6 times [2021-12-15 08:38:24,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:24,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956828001] [2021-12-15 08:38:24,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:24,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:38:25,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:25,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956828001] [2021-12-15 08:38:25,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956828001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:38:25,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855376890] [2021-12-15 08:38:25,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 08:38:25,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:25,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:38:25,506 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) [2021-12-15 08:38:25,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 08:38:27,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-15 08:38:27,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:38:27,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-15 08:38:27,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:38:27,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:38:27,873 INFO L354 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2021-12-15 08:38:27,873 INFO L388 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 4 case distinctions, treesize of input 38 treesize of output 49 [2021-12-15 08:38:27,957 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 08:38:27,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:38:28,030 INFO L354 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2021-12-15 08:38:28,031 INFO L388 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 4 case distinctions, treesize of input 50 treesize of output 61 [2021-12-15 08:38:28,087 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 08:38:28,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:38:28,164 INFO L354 Elim1Store]: treesize reduction 479, result has 11.5 percent of original size [2021-12-15 08:38:28,165 INFO L388 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 6 case distinctions, treesize of input 62 treesize of output 80 [2021-12-15 08:38:28,344 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 08:38:28,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:38:28,408 INFO L354 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2021-12-15 08:38:28,408 INFO L388 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 4 case distinctions, treesize of input 50 treesize of output 61 [2021-12-15 08:38:28,475 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 08:38:28,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:38:28,514 INFO L354 Elim1Store]: treesize reduction 181, result has 13.4 percent of original size [2021-12-15 08:38:28,514 INFO L388 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 4 case distinctions, treesize of input 47 treesize of output 43 [2021-12-15 08:38:28,579 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 08:38:28,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:38:28,636 INFO L354 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2021-12-15 08:38:28,637 INFO L388 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 4 case distinctions, treesize of input 50 treesize of output 61 [2021-12-15 08:38:28,679 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 08:38:28,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:38:28,702 INFO L388 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 0 case distinctions, treesize of input 85 treesize of output 74 [2021-12-15 08:38:28,799 INFO L354 Elim1Store]: treesize reduction 979, result has 6.1 percent of original size [2021-12-15 08:38:28,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 140 treesize of output 127 [2021-12-15 08:38:28,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-15 08:38:28,830 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-12-15 08:38:28,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 43 [2021-12-15 08:38:28,984 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 08:38:28,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:38:29,033 INFO L354 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2021-12-15 08:38:29,033 INFO L388 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 4 case distinctions, treesize of input 50 treesize of output 61 [2021-12-15 08:38:29,079 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 08:38:29,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:38:29,116 INFO L354 Elim1Store]: treesize reduction 181, result has 13.4 percent of original size [2021-12-15 08:38:29,116 INFO L388 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 4 case distinctions, treesize of input 47 treesize of output 43 [2021-12-15 08:38:29,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 08:38:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:38:29,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:38:31,361 INFO L388 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 35 treesize of output 33 [2021-12-15 08:38:31,369 INFO L388 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 98718 treesize of output 98206 [2021-12-15 08:38:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 12 proven. 94 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:38:35,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855376890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:38:35,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:38:35,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 25] total 57 [2021-12-15 08:38:35,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167154157] [2021-12-15 08:38:35,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:38:35,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-15 08:38:35,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:38:35,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-15 08:38:35,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=2725, Unknown=0, NotChecked=0, Total=3192 [2021-12-15 08:38:35,115 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 57 states, 57 states have (on average 4.543859649122807) internal successors, (259), 57 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:38:40,728 INFO L93 Difference]: Finished difference Result 573 states and 612 transitions. [2021-12-15 08:38:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-15 08:38:40,729 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.543859649122807) internal successors, (259), 57 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-15 08:38:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:38:40,731 INFO L225 Difference]: With dead ends: 573 [2021-12-15 08:38:40,731 INFO L226 Difference]: Without dead ends: 563 [2021-12-15 08:38:40,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 193 SyntacticMatches, 55 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11244 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=3149, Invalid=24241, Unknown=0, NotChecked=0, Total=27390 [2021-12-15 08:38:40,736 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 905 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 2561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:38:40,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 606 Invalid, 2561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1525 Invalid, 0 Unknown, 510 Unchecked, 1.0s Time] [2021-12-15 08:38:40,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-15 08:38:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 217. [2021-12-15 08:38:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0833333333333333) internal successors, (234), 216 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) [2021-12-15 08:38:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 234 transitions. [2021-12-15 08:38:40,755 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 234 transitions. Word has length 91 [2021-12-15 08:38:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:38:40,755 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 234 transitions. [2021-12-15 08:38:40,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.543859649122807) internal successors, (259), 57 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 234 transitions. [2021-12-15 08:38:40,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 08:38:40,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:40,757 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:40,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 08:38:40,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:40,968 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:40,969 INFO L85 PathProgramCache]: Analyzing trace with hash 463915083, now seen corresponding path program 7 times [2021-12-15 08:38:40,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:40,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672443721] [2021-12-15 08:38:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:40,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:38:41,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:41,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672443721] [2021-12-15 08:38:41,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672443721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:38:41,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363338606] [2021-12-15 08:38:41,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 08:38:41,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:41,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:38:41,520 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) [2021-12-15 08:38:41,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 08:38:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:41,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 137 conjunts are in the unsatisfiable core [2021-12-15 08:38:41,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:38:41,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:38:41,910 INFO L388 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 0 case distinctions, treesize of input 61 treesize of output 50 [2021-12-15 08:38:41,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 49 [2021-12-15 08:38:41,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:38:41,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:41,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:38:42,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 61 [2021-12-15 08:38:42,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:42,073 INFO L388 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 0 case distinctions, treesize of input 61 treesize of output 50 [2021-12-15 08:38:42,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2021-12-15 08:38:42,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:38:42,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 61 [2021-12-15 08:38:42,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:42,191 INFO L388 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 0 case distinctions, treesize of input 58 treesize of output 49 [2021-12-15 08:38:42,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2021-12-15 08:38:42,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:38:42,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:38:42,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 61 [2021-12-15 08:38:42,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:38:42,325 INFO L388 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 0 case distinctions, treesize of input 61 treesize of output 50 [2021-12-15 08:38:42,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:38:42,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2021-12-15 08:38:42,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 08:38:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 126 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 08:38:42,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:38:51,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:38:51,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 08:38:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:38:51,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363338606] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:38:51,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:38:51,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 15] total 42 [2021-12-15 08:38:51,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527434964] [2021-12-15 08:38:51,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:38:51,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-15 08:38:51,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:38:51,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-15 08:38:51,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 08:38:51,863 INFO L87 Difference]: Start difference. First operand 217 states and 234 transitions. Second operand has 42 states, 42 states have (on average 6.380952380952381) internal successors, (268), 42 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:38:59,004 INFO L93 Difference]: Finished difference Result 1390 states and 1536 transitions. [2021-12-15 08:38:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-12-15 08:38:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.380952380952381) internal successors, (268), 42 states have internal predecessors, (268), 0 states have call successors, (0), 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 [2021-12-15 08:38:59,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:38:59,008 INFO L225 Difference]: With dead ends: 1390 [2021-12-15 08:38:59,009 INFO L226 Difference]: Without dead ends: 1380 [2021-12-15 08:38:59,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 196 SyntacticMatches, 33 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13504 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=3384, Invalid=32906, Unknown=0, NotChecked=0, Total=36290 [2021-12-15 08:38:59,017 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 2040 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 2949 mSolverCounterSat, 1723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 4939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1723 IncrementalHoareTripleChecker+Valid, 2949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 08:38:59,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2040 Valid, 555 Invalid, 4939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1723 Valid, 2949 Invalid, 0 Unknown, 267 Unchecked, 1.9s Time] [2021-12-15 08:38:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-12-15 08:38:59,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 231. [2021-12-15 08:38:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0869565217391304) internal successors, (250), 230 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 250 transitions. [2021-12-15 08:38:59,041 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 250 transitions. Word has length 97 [2021-12-15 08:38:59,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:38:59,042 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 250 transitions. [2021-12-15 08:38:59,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.380952380952381) internal successors, (268), 42 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:38:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 250 transitions. [2021-12-15 08:38:59,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-15 08:38:59,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:38:59,044 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:38:59,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 08:38:59,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 08:38:59,256 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:38:59,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:38:59,256 INFO L85 PathProgramCache]: Analyzing trace with hash 163561198, now seen corresponding path program 8 times [2021-12-15 08:38:59,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:38:59,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133618484] [2021-12-15 08:38:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:38:59,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:38:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:38:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-15 08:38:59,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:38:59,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133618484] [2021-12-15 08:38:59,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133618484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:38:59,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115311635] [2021-12-15 08:38:59,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:38:59,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:38:59,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:38:59,403 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) [2021-12-15 08:38:59,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 08:38:59,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:38:59,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:38:59,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:38:59,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:38:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-15 08:38:59,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-15 08:39:00,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115311635] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:00,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:00,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 08:39:00,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296986098] [2021-12-15 08:39:00,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:00,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:39:00,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:39:00,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:39:00,167 INFO L87 Difference]: Start difference. First operand 231 states and 250 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-12-15 08:39:00,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:00,549 INFO L93 Difference]: Finished difference Result 477 states and 514 transitions. [2021-12-15 08:39:00,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 08:39:00,550 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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 99 [2021-12-15 08:39:00,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:00,551 INFO L225 Difference]: With dead ends: 477 [2021-12-15 08:39:00,551 INFO L226 Difference]: Without dead ends: 333 [2021-12-15 08:39:00,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 191 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-15 08:39:00,552 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 207 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:00,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 139 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:39:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-15 08:39:00,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 254. [2021-12-15 08:39:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.075098814229249) internal successors, (272), 253 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 272 transitions. [2021-12-15 08:39:00,572 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 272 transitions. Word has length 99 [2021-12-15 08:39:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:00,572 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 272 transitions. [2021-12-15 08:39:00,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-12-15 08:39:00,573 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 272 transitions. [2021-12-15 08:39:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-15 08:39:00,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:00,574 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:00,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:00,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 08:39:00,788 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:00,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:00,788 INFO L85 PathProgramCache]: Analyzing trace with hash -773865378, now seen corresponding path program 9 times [2021-12-15 08:39:00,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:00,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335455738] [2021-12-15 08:39:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:00,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 14 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:39:01,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:01,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335455738] [2021-12-15 08:39:01,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335455738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:01,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040726892] [2021-12-15 08:39:01,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:39:01,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:01,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:01,490 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) [2021-12-15 08:39:01,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 08:39:04,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-15 08:39:04,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:39:04,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-15 08:39:04,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:04,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:04,784 INFO L354 Elim1Store]: treesize reduction 324, result has 10.2 percent of original size [2021-12-15 08:39:04,784 INFO L388 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 4 case distinctions, treesize of input 38 treesize of output 49 [2021-12-15 08:39:04,852 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 08:39:04,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:39:04,900 INFO L354 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2021-12-15 08:39:04,901 INFO L388 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 4 case distinctions, treesize of input 50 treesize of output 61 [2021-12-15 08:39:04,938 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:04,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:04,954 INFO L388 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 0 case distinctions, treesize of input 63 treesize of output 54 [2021-12-15 08:39:04,980 INFO L354 Elim1Store]: treesize reduction 193, result has 12.7 percent of original size [2021-12-15 08:39:04,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 case distinctions, treesize of input 199 treesize of output 190 [2021-12-15 08:39:05,070 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-15 08:39:05,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:39:05,123 INFO L354 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2021-12-15 08:39:05,124 INFO L388 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 4 case distinctions, treesize of input 50 treesize of output 61 [2021-12-15 08:39:05,169 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:05,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:05,184 INFO L388 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 0 case distinctions, treesize of input 80 treesize of output 67 [2021-12-15 08:39:05,239 INFO L354 Elim1Store]: treesize reduction 374, result has 10.3 percent of original size [2021-12-15 08:39:05,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 162 treesize of output 154 [2021-12-15 08:39:05,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-15 08:39:05,292 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-12-15 08:39:05,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 34 [2021-12-15 08:39:05,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 08:39:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 14 proven. 158 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:39:05,709 INFO L328 TraceCheckSpWp]: Computing backward predicates...