./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/condn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-fpi/condn.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 d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 01:26:16,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 01:26:16,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 01:26:16,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 01:26:16,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 01:26:16,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 01:26:16,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 01:26:16,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 01:26:16,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 01:26:16,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 01:26:16,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 01:26:16,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 01:26:16,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 01:26:16,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 01:26:16,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 01:26:16,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 01:26:16,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 01:26:16,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 01:26:16,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 01:26:16,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 01:26:16,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 01:26:16,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 01:26:16,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 01:26:16,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 01:26:16,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 01:26:16,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 01:26:16,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 01:26:16,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 01:26:16,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 01:26:16,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 01:26:16,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 01:26:16,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 01:26:16,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 01:26:16,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 01:26:16,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 01:26:16,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 01:26:16,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 01:26:16,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 01:26:16,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 01:26:16,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 01:26:16,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 01:26:16,441 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 01:26:16,456 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 01:26:16,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 01:26:16,463 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 01:26:16,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 01:26:16,464 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 01:26:16,465 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 01:26:16,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 01:26:16,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 01:26:16,466 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 01:26:16,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 01:26:16,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 01:26:16,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 01:26:16,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 01:26:16,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 01:26:16,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 01:26:16,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 01:26:16,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 01:26:16,468 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 01:26:16,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 01:26:16,468 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 01:26:16,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 01:26:16,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 01:26:16,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 01:26:16,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 01:26:16,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 01:26:16,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 01:26:16,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 01:26:16,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 01:26:16,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 01:26:16,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 01:26:16,470 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 01:26:16,470 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 01:26:16,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 01:26:16,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 01:26:16,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 [2021-12-17 01:26:16,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 01:26:16,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 01:26:16,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 01:26:16,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 01:26:16,668 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 01:26:16,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condn.c [2021-12-17 01:26:16,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aead89534/7f47c4b74c4c4db290f65d4e9042c91b/FLAG59a9d9cd9 [2021-12-17 01:26:17,092 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 01:26:17,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c [2021-12-17 01:26:17,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aead89534/7f47c4b74c4c4db290f65d4e9042c91b/FLAG59a9d9cd9 [2021-12-17 01:26:17,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aead89534/7f47c4b74c4c4db290f65d4e9042c91b [2021-12-17 01:26:17,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 01:26:17,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 01:26:17,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 01:26:17,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 01:26:17,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 01:26:17,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:26:17" (1/1) ... [2021-12-17 01:26:17,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd767a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17, skipping insertion in model container [2021-12-17 01:26:17,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:26:17" (1/1) ... [2021-12-17 01:26:17,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 01:26:17,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 01:26:17,260 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-fpi/condn.c[588,601] [2021-12-17 01:26:17,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 01:26:17,274 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 01:26:17,281 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-fpi/condn.c[588,601] [2021-12-17 01:26:17,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 01:26:17,293 INFO L208 MainTranslator]: Completed translation [2021-12-17 01:26:17,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17 WrapperNode [2021-12-17 01:26:17,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 01:26:17,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 01:26:17,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 01:26:17,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 01:26:17,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17" (1/1) ... [2021-12-17 01:26:17,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17" (1/1) ... [2021-12-17 01:26:17,314 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2021-12-17 01:26:17,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 01:26:17,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 01:26:17,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 01:26:17,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 01:26:17,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17" (1/1) ... [2021-12-17 01:26:17,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17" (1/1) ... [2021-12-17 01:26:17,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17" (1/1) ... [2021-12-17 01:26:17,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17" (1/1) ... [2021-12-17 01:26:17,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17" (1/1) ... [2021-12-17 01:26:17,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17" (1/1) ... [2021-12-17 01:26:17,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17" (1/1) ... [2021-12-17 01:26:17,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 01:26:17,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 01:26:17,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 01:26:17,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 01:26:17,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17" (1/1) ... [2021-12-17 01:26:17,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 01:26:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:26:17,358 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) [2021-12-17 01:26:17,364 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 [2021-12-17 01:26:17,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 01:26:17,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 01:26:17,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 01:26:17,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 01:26:17,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 01:26:17,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 01:26:17,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 01:26:17,444 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 01:26:17,445 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 01:26:17,536 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 01:26:17,541 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 01:26:17,541 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 01:26:17,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:26:17 BoogieIcfgContainer [2021-12-17 01:26:17,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 01:26:17,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 01:26:17,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 01:26:17,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 01:26:17,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 01:26:17" (1/3) ... [2021-12-17 01:26:17,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7578e3fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:26:17, skipping insertion in model container [2021-12-17 01:26:17,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:26:17" (2/3) ... [2021-12-17 01:26:17,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7578e3fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:26:17, skipping insertion in model container [2021-12-17 01:26:17,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:26:17" (3/3) ... [2021-12-17 01:26:17,549 INFO L111 eAbstractionObserver]: Analyzing ICFG condn.c [2021-12-17 01:26:17,552 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 01:26:17,552 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 01:26:17,584 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 01:26:17,589 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 [2021-12-17 01:26:17,589 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 01:26:17,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 01:26:17,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:26:17,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:26:17,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:26:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:26:17,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1828392228, now seen corresponding path program 1 times [2021-12-17 01:26:17,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:26:17,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528123333] [2021-12-17 01:26:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:17,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:26:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:26:17,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:26:17,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528123333] [2021-12-17 01:26:17,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528123333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:26:17,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:26:17,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 01:26:17,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116560514] [2021-12-17 01:26:17,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:26:17,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 01:26:17,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:26:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 01:26:17,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 01:26:17,802 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:26:17,811 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-12-17 01:26:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 01:26:17,813 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-17 01:26:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:26:17,817 INFO L225 Difference]: With dead ends: 40 [2021-12-17 01:26:17,817 INFO L226 Difference]: Without dead ends: 18 [2021-12-17 01:26:17,819 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 [2021-12-17 01:26:17,822 INFO L933 BasicCegarLoop]: 26 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, 26 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 [2021-12-17 01:26:17,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:26:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-17 01:26:17,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-17 01:26:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2021-12-17 01:26:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-17 01:26:17,868 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-12-17 01:26:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:26:17,869 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-17 01:26:17,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-17 01:26:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 01:26:17,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:26:17,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:26:17,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 01:26:17,870 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:26:17,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:26:17,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1148333858, now seen corresponding path program 1 times [2021-12-17 01:26:17,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:26:17,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793344909] [2021-12-17 01:26:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:17,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:26:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:26:17,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:26:17,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793344909] [2021-12-17 01:26:17,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793344909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:26:17,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:26:17,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 01:26:17,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041366963] [2021-12-17 01:26:17,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:26:17,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 01:26:17,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:26:17,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 01:26:17,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 01:26:17,954 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:26:18,000 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-12-17 01:26:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 01:26:18,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-17 01:26:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:26:18,002 INFO L225 Difference]: With dead ends: 40 [2021-12-17 01:26:18,002 INFO L226 Difference]: Without dead ends: 29 [2021-12-17 01:26:18,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 01:26:18,007 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:26:18,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:26:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-17 01:26:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-12-17 01:26:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:18,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-17 01:26:18,025 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-12-17 01:26:18,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:26:18,026 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-17 01:26:18,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-17 01:26:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-17 01:26:18,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:26:18,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:26:18,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 01:26:18,030 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:26:18,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:26:18,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2142875084, now seen corresponding path program 1 times [2021-12-17 01:26:18,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:26:18,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089288797] [2021-12-17 01:26:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:18,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:26:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:26:18,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:26:18,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089288797] [2021-12-17 01:26:18,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089288797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:26:18,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980393064] [2021-12-17 01:26:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:18,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:18,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:26:18,249 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) [2021-12-17 01:26:18,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 01:26:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:18,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 01:26:18,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:26:18,381 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 26 treesize of output 14 [2021-12-17 01:26:18,428 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 9 [2021-12-17 01:26:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:26:18,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:26:18,527 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 36 treesize of output 30 [2021-12-17 01:26:18,532 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 01:26:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 31 [2021-12-17 01:26:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:26:18,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980393064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:26:18,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:26:18,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2021-12-17 01:26:18,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42658846] [2021-12-17 01:26:18,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:26:18,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 01:26:18,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:26:18,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 01:26:18,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-17 01:26:18,550 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:18,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:26:18,765 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2021-12-17 01:26:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 01:26:18,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-17 01:26:18,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:26:18,766 INFO L225 Difference]: With dead ends: 47 [2021-12-17 01:26:18,766 INFO L226 Difference]: Without dead ends: 45 [2021-12-17 01:26:18,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-12-17 01:26:18,768 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:26:18,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 69 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 121 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2021-12-17 01:26:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-17 01:26:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2021-12-17 01:26:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-17 01:26:18,771 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2021-12-17 01:26:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:26:18,771 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-17 01:26:18,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-17 01:26:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 01:26:18,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:26:18,772 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:26:18,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 01:26:18,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:18,994 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:26:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:26:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2090341226, now seen corresponding path program 1 times [2021-12-17 01:26:18,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:26:18,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166714441] [2021-12-17 01:26:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:18,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:26:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:26:19,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:26:19,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166714441] [2021-12-17 01:26:19,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166714441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:26:19,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658686312] [2021-12-17 01:26:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:19,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:19,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:26:19,059 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) [2021-12-17 01:26:19,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 01:26:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:19,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 01:26:19,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:26:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:26:19,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:26:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:26:19,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658686312] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:26:19,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:26:19,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-17 01:26:19,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259761388] [2021-12-17 01:26:19,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:26:19,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 01:26:19,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:26:19,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 01:26:19,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-17 01:26:19,195 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:19,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:26:19,298 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2021-12-17 01:26:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 01:26:19,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-17 01:26:19,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:26:19,299 INFO L225 Difference]: With dead ends: 62 [2021-12-17 01:26:19,299 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 01:26:19,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-17 01:26:19,300 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:26:19,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 47 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:26:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 01:26:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-12-17 01:26:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-17 01:26:19,307 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-12-17 01:26:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:26:19,308 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-17 01:26:19,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:19,308 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-17 01:26:19,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 01:26:19,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:26:19,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:26:19,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 01:26:19,524 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,SelfDestructingSolverStorable3 [2021-12-17 01:26:19,525 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:26:19,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:26:19,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1394926352, now seen corresponding path program 2 times [2021-12-17 01:26:19,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:26:19,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731685334] [2021-12-17 01:26:19,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:19,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:26:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:26:19,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:26:19,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731685334] [2021-12-17 01:26:19,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731685334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:26:19,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064195757] [2021-12-17 01:26:19,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:26:19,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:19,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:26:19,718 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) [2021-12-17 01:26:19,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 01:26:19,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:26:19,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:26:19,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 01:26:19,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:26:19,814 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 38 treesize of output 18 [2021-12-17 01:26:19,869 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 21 treesize of output 9 [2021-12-17 01:26:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 01:26:19,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:26:19,968 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 38 treesize of output 32 [2021-12-17 01:26:19,972 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:26:19,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 35 [2021-12-17 01:26:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 01:26:19,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064195757] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:26:19,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:26:19,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 22 [2021-12-17 01:26:19,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019142105] [2021-12-17 01:26:19,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:26:19,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 01:26:19,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:26:19,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 01:26:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-12-17 01:26:19,993 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:20,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:26:20,431 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-12-17 01:26:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 01:26:20,432 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-17 01:26:20,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:26:20,432 INFO L225 Difference]: With dead ends: 61 [2021-12-17 01:26:20,432 INFO L226 Difference]: Without dead ends: 59 [2021-12-17 01:26:20,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=394, Invalid=1586, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 01:26:20,434 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:26:20,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 83 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 290 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-12-17 01:26:20,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-17 01:26:20,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-12-17 01:26:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-17 01:26:20,437 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2021-12-17 01:26:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:26:20,437 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-17 01:26:20,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-17 01:26:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 01:26:20,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:26:20,438 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:26:20,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 01:26:20,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:20,648 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:26:20,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:26:20,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1446324666, now seen corresponding path program 3 times [2021-12-17 01:26:20,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:26:20,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945939282] [2021-12-17 01:26:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:20,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:26:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 01:26:20,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:26:20,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945939282] [2021-12-17 01:26:20,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945939282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:26:20,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64309067] [2021-12-17 01:26:20,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:26:20,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:20,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:26:20,705 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) [2021-12-17 01:26:20,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 01:26:20,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 01:26:20,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:26:20,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 01:26:20,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:26:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 01:26:20,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:26:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 01:26:20,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64309067] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:26:20,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:26:20,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-17 01:26:20,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571983226] [2021-12-17 01:26:20,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:26:20,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 01:26:20,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:26:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 01:26:20,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-17 01:26:20,902 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:26:20,995 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-12-17 01:26:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 01:26:20,995 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 01:26:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:26:20,996 INFO L225 Difference]: With dead ends: 82 [2021-12-17 01:26:20,996 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 01:26:20,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-17 01:26:20,997 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:26:20,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 57 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:26:20,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 01:26:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-12-17 01:26:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 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) [2021-12-17 01:26:21,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-17 01:26:21,001 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2021-12-17 01:26:21,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:26:21,001 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-17 01:26:21,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-17 01:26:21,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 01:26:21,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:26:21,002 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:26:21,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 01:26:21,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:21,223 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:26:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:26:21,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1754360412, now seen corresponding path program 4 times [2021-12-17 01:26:21,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:26:21,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543750594] [2021-12-17 01:26:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:21,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:26:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 01:26:21,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:26:21,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543750594] [2021-12-17 01:26:21,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543750594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:26:21,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291492038] [2021-12-17 01:26:21,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:26:21,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:21,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:26:21,448 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) [2021-12-17 01:26:21,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 01:26:21,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:26:21,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:26:21,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 01:26:21,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:26:21,557 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 32 treesize of output 16 [2021-12-17 01:26:21,656 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 [2021-12-17 01:26:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 01:26:21,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:26:21,780 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 38 treesize of output 32 [2021-12-17 01:26:21,784 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:26:21,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 35 [2021-12-17 01:26:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 01:26:21,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291492038] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:26:21,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:26:21,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2021-12-17 01:26:21,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494155427] [2021-12-17 01:26:21,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:26:21,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 01:26:21,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:26:21,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 01:26:21,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-12-17 01:26:21,816 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:22,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:26:22,250 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-12-17 01:26:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 01:26:22,250 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-17 01:26:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:26:22,251 INFO L225 Difference]: With dead ends: 75 [2021-12-17 01:26:22,251 INFO L226 Difference]: Without dead ends: 73 [2021-12-17 01:26:22,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 01:26:22,252 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 113 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:26:22,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 136 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 446 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2021-12-17 01:26:22,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-17 01:26:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-12-17 01:26:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-12-17 01:26:22,255 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2021-12-17 01:26:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:26:22,256 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-12-17 01:26:22,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-12-17 01:26:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 01:26:22,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:26:22,256 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:26:22,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 01:26:22,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:22,467 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:26:22,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:26:22,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1980833498, now seen corresponding path program 5 times [2021-12-17 01:26:22,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:26:22,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547610995] [2021-12-17 01:26:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:22,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:26:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 01:26:22,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:26:22,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547610995] [2021-12-17 01:26:22,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547610995] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:26:22,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887822311] [2021-12-17 01:26:22,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:26:22,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:22,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:26:22,543 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) [2021-12-17 01:26:22,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 01:26:22,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 01:26:22,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:26:22,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 01:26:22,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:26:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 01:26:22,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:26:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 01:26:22,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887822311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:26:22,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:26:22,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-17 01:26:22,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722030490] [2021-12-17 01:26:22,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:26:22,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 01:26:22,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:26:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 01:26:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-17 01:26:22,772 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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) [2021-12-17 01:26:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:26:22,895 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2021-12-17 01:26:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 01:26:22,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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) Word has length 39 [2021-12-17 01:26:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:26:22,896 INFO L225 Difference]: With dead ends: 102 [2021-12-17 01:26:22,896 INFO L226 Difference]: Without dead ends: 56 [2021-12-17 01:26:22,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-17 01:26:22,897 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:26:22,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 76 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:26:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-17 01:26:22,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2021-12-17 01:26:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-12-17 01:26:22,900 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 39 [2021-12-17 01:26:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:26:22,900 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-12-17 01:26:22,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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) [2021-12-17 01:26:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-12-17 01:26:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 01:26:22,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:26:22,901 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:26:22,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 01:26:23,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:23,112 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:26:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:26:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash -249765768, now seen corresponding path program 6 times [2021-12-17 01:26:23,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:26:23,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40476589] [2021-12-17 01:26:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:23,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:26:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:26:23,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:26:23,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40476589] [2021-12-17 01:26:23,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40476589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:26:23,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425510033] [2021-12-17 01:26:23,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:26:23,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:23,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:26:23,468 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) [2021-12-17 01:26:23,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 01:26:23,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-17 01:26:23,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:26:23,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 01:26:23,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:26:23,659 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 38 treesize of output 18 [2021-12-17 01:26:24,002 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:26:24,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2021-12-17 01:26:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 01:26:24,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:26:24,379 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 73 treesize of output 63 [2021-12-17 01:26:24,383 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-17 01:26:24,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 79 [2021-12-17 01:26:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 01:26:24,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425510033] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:26:24,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:26:24,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 41 [2021-12-17 01:26:24,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679329302] [2021-12-17 01:26:24,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:26:24,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 01:26:24,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:26:24,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 01:26:24,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 01:26:24,420 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:26:25,093 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2021-12-17 01:26:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 01:26:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-17 01:26:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:26:25,094 INFO L225 Difference]: With dead ends: 80 [2021-12-17 01:26:25,094 INFO L226 Difference]: Without dead ends: 60 [2021-12-17 01:26:25,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=787, Invalid=4469, Unknown=0, NotChecked=0, Total=5256 [2021-12-17 01:26:25,096 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:26:25,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 197 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 179 Invalid, 0 Unknown, 231 Unchecked, 0.1s Time] [2021-12-17 01:26:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-17 01:26:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2021-12-17 01:26:25,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-12-17 01:26:25,100 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 44 [2021-12-17 01:26:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:26:25,101 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-12-17 01:26:25,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-12-17 01:26:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 01:26:25,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:26:25,102 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:26:25,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 01:26:25,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:25,302 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:26:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:26:25,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1938709510, now seen corresponding path program 1 times [2021-12-17 01:26:25,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:26:25,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386958906] [2021-12-17 01:26:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:25,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:26:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:26:25,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:26:25,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386958906] [2021-12-17 01:26:25,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386958906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:26:25,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772230376] [2021-12-17 01:26:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:25,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:25,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:26:25,581 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) [2021-12-17 01:26:25,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 01:26:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:25,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 01:26:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:26:25,718 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 13 treesize of output 9 [2021-12-17 01:26:25,843 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 [2021-12-17 01:26:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 01:26:25,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:26:25,963 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 16 treesize of output 14 [2021-12-17 01:26:25,966 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 28 treesize of output 24 [2021-12-17 01:26:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 01:26:26,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772230376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:26:26,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:26:26,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 12] total 33 [2021-12-17 01:26:26,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619467139] [2021-12-17 01:26:26,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:26:26,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 01:26:26,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:26:26,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 01:26:26,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 01:26:26,005 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:26:26,839 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-12-17 01:26:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 01:26:26,839 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 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 44 [2021-12-17 01:26:26,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:26:26,840 INFO L225 Difference]: With dead ends: 92 [2021-12-17 01:26:26,840 INFO L226 Difference]: Without dead ends: 90 [2021-12-17 01:26:26,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=3817, Unknown=0, NotChecked=0, Total=4422 [2021-12-17 01:26:26,841 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 190 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 01:26:26,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 238 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 01:26:26,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-17 01:26:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56. [2021-12-17 01:26:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 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) [2021-12-17 01:26:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-12-17 01:26:26,846 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 44 [2021-12-17 01:26:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:26:26,847 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-12-17 01:26:26,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-12-17 01:26:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 01:26:26,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:26:26,848 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:26:26,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-17 01:26:27,057 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,SelfDestructingSolverStorable9 [2021-12-17 01:26:27,058 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:26:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:26:27,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1288199652, now seen corresponding path program 7 times [2021-12-17 01:26:27,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:26:27,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470971953] [2021-12-17 01:26:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:27,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:26:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 01:26:27,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:26:27,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470971953] [2021-12-17 01:26:27,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470971953] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:26:27,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482844948] [2021-12-17 01:26:27,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:26:27,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:27,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:26:27,149 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) [2021-12-17 01:26:27,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 01:26:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 01:26:27,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:26:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 01:26:27,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:26:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 01:26:27,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482844948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:26:27,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:26:27,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-17 01:26:27,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874989087] [2021-12-17 01:26:27,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:26:27,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 01:26:27,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:26:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 01:26:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-17 01:26:27,392 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:26:27,557 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2021-12-17 01:26:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 01:26:27,558 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-17 01:26:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:26:27,558 INFO L225 Difference]: With dead ends: 152 [2021-12-17 01:26:27,558 INFO L226 Difference]: Without dead ends: 89 [2021-12-17 01:26:27,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-17 01:26:27,559 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:26:27,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 103 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:26:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-17 01:26:27,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2021-12-17 01:26:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-12-17 01:26:27,572 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 47 [2021-12-17 01:26:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:26:27,572 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-12-17 01:26:27,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:26:27,572 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-12-17 01:26:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 01:26:27,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:26:27,573 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:26:27,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 01:26:27,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:27,785 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:26:27,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:26:27,785 INFO L85 PathProgramCache]: Analyzing trace with hash 534659294, now seen corresponding path program 8 times [2021-12-17 01:26:27,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:26:27,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690906818] [2021-12-17 01:26:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:26:27,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:26:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:26:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:26:28,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:26:28,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690906818] [2021-12-17 01:26:28,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690906818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:26:28,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606872013] [2021-12-17 01:26:28,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:26:28,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:26:28,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:26:28,159 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) [2021-12-17 01:26:28,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 01:26:28,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:26:28,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:26:28,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 01:26:28,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:26:28,327 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 38 treesize of output 18 [2021-12-17 01:26:28,368 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:26:28,369 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 25 treesize of output 24 [2021-12-17 01:26:28,492 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 [2021-12-17 01:26:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 01:26:28,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:26:50,596 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 45 treesize of output 39 [2021-12-17 01:26:50,601 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:26:50,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 89 [2021-12-17 01:26:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 50 refuted. 3 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 01:26:50,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606872013] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:26:50,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:26:50,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 15] total 37 [2021-12-17 01:26:50,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944808444] [2021-12-17 01:26:50,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:26:50,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-17 01:26:50,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:26:50,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-17 01:26:50,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1151, Unknown=16, NotChecked=0, Total=1332 [2021-12-17 01:26:50,665 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:27:20,103 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (forall ((v_ArrVal_293 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4)) v_ArrVal_293) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) c_~N~0)) (< |v_ULTIMATE.start_main_~i~0#1_142| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0) (= |c_ULTIMATE.start_main_~i~0#1| 3) (<= 1 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|)) is different from false [2021-12-17 01:27:22,288 WARN L838 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~i~0#1| 3) (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (forall ((v_ArrVal_293 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4)) v_ArrVal_293) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) c_~N~0)) (< |v_ULTIMATE.start_main_~i~0#1_142| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 1 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|)) is different from false [2021-12-17 01:27:22,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:27:22,310 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2021-12-17 01:27:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-17 01:27:22,310 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-17 01:27:22,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:27:22,311 INFO L225 Difference]: With dead ends: 153 [2021-12-17 01:27:22,311 INFO L226 Difference]: Without dead ends: 151 [2021-12-17 01:27:22,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 83 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 53.5s TimeCoverageRelationStatistics Valid=638, Invalid=5202, Unknown=20, NotChecked=302, Total=6162 [2021-12-17 01:27:22,312 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 213 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:27:22,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 303 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 940 Invalid, 0 Unknown, 213 Unchecked, 0.4s Time] [2021-12-17 01:27:22,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-17 01:27:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 54. [2021-12-17 01:27:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:27:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-12-17 01:27:22,318 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 49 [2021-12-17 01:27:22,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:27:22,318 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-12-17 01:27:22,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:27:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-12-17 01:27:22,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 01:27:22,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:27:22,318 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:27:22,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 01:27:22,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 01:27:22,519 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:27:22,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:27:22,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1679516396, now seen corresponding path program 9 times [2021-12-17 01:27:22,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:27:22,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355021035] [2021-12-17 01:27:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:27:22,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:27:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:27:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:27:22,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:27:22,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355021035] [2021-12-17 01:27:22,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355021035] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:27:22,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487987636] [2021-12-17 01:27:22,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:27:22,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:27:22,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:27:22,946 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:27:22,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 01:27:23,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-17 01:27:23,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:27:23,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 01:27:23,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:27:23,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-12-17 01:27:23,525 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:27:23,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2021-12-17 01:27:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 01:27:23,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:27:24,030 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 73 treesize of output 63 [2021-12-17 01:27:24,034 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-17 01:27:24,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 79 [2021-12-17 01:27:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 01:27:24,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487987636] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:27:24,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:27:24,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 17] total 48 [2021-12-17 01:27:24,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105365971] [2021-12-17 01:27:24,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:27:24,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-17 01:27:24,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:27:24,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-17 01:27:24,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 01:27:24,071 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 48 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) [2021-12-17 01:27:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:27:25,483 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2021-12-17 01:27:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-17 01:27:25,484 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 48 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 53 [2021-12-17 01:27:25,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:27:25,484 INFO L225 Difference]: With dead ends: 119 [2021-12-17 01:27:25,484 INFO L226 Difference]: Without dead ends: 74 [2021-12-17 01:27:25,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1099, Invalid=8213, Unknown=0, NotChecked=0, Total=9312 [2021-12-17 01:27:25,486 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:27:25,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 290 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 344 Invalid, 0 Unknown, 232 Unchecked, 0.2s Time] [2021-12-17 01:27:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-17 01:27:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 57. [2021-12-17 01:27:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 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) [2021-12-17 01:27:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2021-12-17 01:27:25,491 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 53 [2021-12-17 01:27:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:27:25,491 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2021-12-17 01:27:25,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 48 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) [2021-12-17 01:27:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2021-12-17 01:27:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 01:27:25,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:27:25,492 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:27:25,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 01:27:25,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 01:27:25,693 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:27:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:27:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash -273043412, now seen corresponding path program 10 times [2021-12-17 01:27:25,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:27:25,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128037245] [2021-12-17 01:27:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:27:25,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:27:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:27:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 01:27:25,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:27:25,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128037245] [2021-12-17 01:27:25,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128037245] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:27:25,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296283378] [2021-12-17 01:27:25,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:27:25,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:27:25,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:27:25,783 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:27:25,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 01:27:25,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:27:25,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:27:25,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 01:27:25,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:27:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 01:27:26,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:27:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 01:27:26,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296283378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:27:26,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:27:26,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-17 01:27:26,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061850275] [2021-12-17 01:27:26,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:27:26,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 01:27:26,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:27:26,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 01:27:26,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-17 01:27:26,134 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 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) [2021-12-17 01:27:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:27:26,291 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2021-12-17 01:27:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 01:27:26,291 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 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) Word has length 56 [2021-12-17 01:27:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:27:26,292 INFO L225 Difference]: With dead ends: 117 [2021-12-17 01:27:26,292 INFO L226 Difference]: Without dead ends: 76 [2021-12-17 01:27:26,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-12-17 01:27:26,293 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 153 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:27:26,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 74 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:27:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-17 01:27:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-12-17 01:27:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 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) [2021-12-17 01:27:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-12-17 01:27:26,297 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 56 [2021-12-17 01:27:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:27:26,298 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-12-17 01:27:26,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 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) [2021-12-17 01:27:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-12-17 01:27:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 01:27:26,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:27:26,298 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:27:26,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 01:27:26,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 01:27:26,516 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:27:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:27:26,517 INFO L85 PathProgramCache]: Analyzing trace with hash -783512662, now seen corresponding path program 11 times [2021-12-17 01:27:26,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:27:26,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208783974] [2021-12-17 01:27:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:27:26,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:27:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:27:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:27:26,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:27:26,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208783974] [2021-12-17 01:27:26,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208783974] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:27:26,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994507908] [2021-12-17 01:27:26,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:27:26,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:27:26,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:27:26,972 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:27:26,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 01:27:27,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-17 01:27:27,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:27:27,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 01:27:27,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:27:27,242 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 38 treesize of output 18 [2021-12-17 01:27:27,305 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:27:27,305 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 27 treesize of output 26 [2021-12-17 01:27:27,476 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 23 treesize of output 7 [2021-12-17 01:27:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 01:27:27,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:28:25,859 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 45 treesize of output 39 [2021-12-17 01:28:25,863 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:28:25,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 89 [2021-12-17 01:28:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 80 refuted. 3 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 01:28:25,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994507908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:28:25,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:28:25,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16, 17] total 43 [2021-12-17 01:28:25,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37996385] [2021-12-17 01:28:25,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:28:25,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-17 01:28:25,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-17 01:28:25,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1575, Unknown=38, NotChecked=0, Total=1806 [2021-12-17 01:28:25,954 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:30,328 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (or (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0) (<= (+ (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) 1) c_~N~0)) (<= (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0) (<= 4 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (<= 1 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_210| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_210| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_443 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_210| 4)) v_ArrVal_443) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0)))))) is different from false [2021-12-17 01:28:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:32,475 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2021-12-17 01:28:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-17 01:28:32,476 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-17 01:28:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:32,477 INFO L225 Difference]: With dead ends: 136 [2021-12-17 01:28:32,477 INFO L226 Difference]: Without dead ends: 134 [2021-12-17 01:28:32,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 64.7s TimeCoverageRelationStatistics Valid=791, Invalid=8484, Unknown=41, NotChecked=190, Total=9506 [2021-12-17 01:28:32,480 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 175 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:32,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 399 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1148 Invalid, 0 Unknown, 139 Unchecked, 0.4s Time] [2021-12-17 01:28:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-17 01:28:32,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 67. [2021-12-17 01:28:32,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 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) [2021-12-17 01:28:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-12-17 01:28:32,487 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 58 [2021-12-17 01:28:32,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:32,487 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-12-17 01:28:32,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-12-17 01:28:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 01:28:32,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:32,488 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:32,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:32,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 01:28:32,708 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:32,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1706016300, now seen corresponding path program 2 times [2021-12-17 01:28:32,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:32,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740130969] [2021-12-17 01:28:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:32,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:28:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:33,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:33,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740130969] [2021-12-17 01:28:33,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740130969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:28:33,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036340672] [2021-12-17 01:28:33,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:28:33,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:33,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:33,255 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:28:33,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 01:28:33,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:28:33,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:28:33,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 01:28:33,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:33,423 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 38 treesize of output 18 [2021-12-17 01:28:33,498 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:28:33,498 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 27 treesize of output 26 [2021-12-17 01:28:33,660 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 23 treesize of output 7 [2021-12-17 01:28:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 01:28:33,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:28:34,223 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_499 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_499) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0)) is different from false [2021-12-17 01:29:28,469 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 45 treesize of output 39 [2021-12-17 01:29:28,474 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:29:28,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 197 [2021-12-17 01:29:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 68 refuted. 4 times theorem prover too weak. 36 trivial. 11 not checked. [2021-12-17 01:29:28,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036340672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:29:28,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:29:28,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16, 17] total 43 [2021-12-17 01:29:28,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264225590] [2021-12-17 01:29:28,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:29:28,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-17 01:29:28,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:29:28,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-17 01:29:28,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1505, Unknown=34, NotChecked=80, Total=1806 [2021-12-17 01:29:28,577 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:29:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:29:31,079 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2021-12-17 01:29:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-17 01:29:31,080 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-17 01:29:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:29:31,080 INFO L225 Difference]: With dead ends: 117 [2021-12-17 01:29:31,080 INFO L226 Difference]: Without dead ends: 115 [2021-12-17 01:29:31,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 57.2s TimeCoverageRelationStatistics Valid=559, Invalid=5414, Unknown=37, NotChecked=152, Total=6162 [2021-12-17 01:29:31,082 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 123 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:29:31,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 438 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1156 Invalid, 0 Unknown, 207 Unchecked, 0.4s Time] [2021-12-17 01:29:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-17 01:29:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 70. [2021-12-17 01:29:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.173913043478261) internal successors, (81), 69 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:29:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2021-12-17 01:29:31,087 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 58 [2021-12-17 01:29:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:29:31,087 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2021-12-17 01:29:31,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:29:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2021-12-17 01:29:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 01:29:31,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:29:31,088 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:29:31,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-17 01:29:31,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:29:31,293 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:29:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:29:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1768055914, now seen corresponding path program 3 times [2021-12-17 01:29:31,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:29:31,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886308330] [2021-12-17 01:29:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:29:31,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:29:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:29:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:29:31,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:29:31,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886308330] [2021-12-17 01:29:31,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886308330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:29:31,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659863675] [2021-12-17 01:29:31,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:29:31,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:29:31,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:29:31,649 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:29:31,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 01:29:31,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-17 01:29:31,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:29:31,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 01:29:31,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:29:31,826 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 15 treesize of output 11 [2021-12-17 01:29:31,884 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:29:31,885 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 27 treesize of output 26 [2021-12-17 01:29:32,174 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 23 treesize of output 7 [2021-12-17 01:29:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 01:29:32,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:30:14,479 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 23 treesize of output 21 [2021-12-17 01:30:14,481 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 178 treesize of output 170 [2021-12-17 01:30:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 01:30:14,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659863675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:30:14,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:30:14,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 16] total 42 [2021-12-17 01:30:14,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52375488] [2021-12-17 01:30:14,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:30:14,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-17 01:30:14,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:30:14,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-17 01:30:14,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1526, Unknown=21, NotChecked=0, Total=1722 [2021-12-17 01:30:14,579 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 42 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:30:44,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:30:44,179 INFO L93 Difference]: Finished difference Result 167 states and 185 transitions. [2021-12-17 01:30:44,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-17 01:30:44,179 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 42 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-17 01:30:44,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:30:44,180 INFO L225 Difference]: With dead ends: 167 [2021-12-17 01:30:44,180 INFO L226 Difference]: Without dead ends: 165 [2021-12-17 01:30:44,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 71.8s TimeCoverageRelationStatistics Valid=1072, Invalid=7449, Unknown=35, NotChecked=0, Total=8556 [2021-12-17 01:30:44,182 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 189 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:30:44,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 341 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 957 Invalid, 0 Unknown, 199 Unchecked, 0.4s Time] [2021-12-17 01:30:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-17 01:30:44,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 67. [2021-12-17 01:30:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 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) [2021-12-17 01:30:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-12-17 01:30:44,189 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 58 [2021-12-17 01:30:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:30:44,189 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-12-17 01:30:44,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 42 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:30:44,189 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-12-17 01:30:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 01:30:44,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:30:44,190 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:30:44,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 01:30:44,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 01:30:44,404 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:30:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:30:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash -647548458, now seen corresponding path program 12 times [2021-12-17 01:30:44,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:30:44,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995032779] [2021-12-17 01:30:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:30:44,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:30:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:30:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 01:30:44,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:30:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995032779] [2021-12-17 01:30:44,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995032779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:30:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456899143] [2021-12-17 01:30:44,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:30:44,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:30:44,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:30:44,519 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:30:44,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 01:30:44,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-17 01:30:44,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:30:44,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 01:30:44,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:30:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 01:30:44,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:30:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 01:30:44,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456899143] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:30:44,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:30:44,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-17 01:30:44,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851435322] [2021-12-17 01:30:44,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:30:44,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 01:30:44,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:30:44,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 01:30:44,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-17 01:30:44,984 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:30:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:30:45,197 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2021-12-17 01:30:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 01:30:45,198 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-17 01:30:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:30:45,198 INFO L225 Difference]: With dead ends: 160 [2021-12-17 01:30:45,198 INFO L226 Difference]: Without dead ends: 133 [2021-12-17 01:30:45,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 01:30:45,199 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 232 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:30:45,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 152 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 01:30:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-17 01:30:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 107. [2021-12-17 01:30:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.169811320754717) internal successors, (124), 106 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:30:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-12-17 01:30:45,210 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 61 [2021-12-17 01:30:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:30:45,211 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-12-17 01:30:45,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:30:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-12-17 01:30:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 01:30:45,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:30:45,211 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:30:45,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-17 01:30:45,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 01:30:45,428 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:30:45,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:30:45,428 INFO L85 PathProgramCache]: Analyzing trace with hash 72917472, now seen corresponding path program 13 times [2021-12-17 01:30:45,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:30:45,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941317042] [2021-12-17 01:30:45,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:30:45,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:30:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:30:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:30:45,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:30:45,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941317042] [2021-12-17 01:30:45,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941317042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:30:45,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070625426] [2021-12-17 01:30:45,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:30:45,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:30:45,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:30:45,653 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:30:45,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 01:30:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:30:45,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 01:30:45,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:30:45,802 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 38 treesize of output 18 [2021-12-17 01:30:45,934 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 21 treesize of output 9 [2021-12-17 01:30:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 01:30:45,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:30:46,096 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 38 treesize of output 32 [2021-12-17 01:30:46,099 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:30:46,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 35 [2021-12-17 01:30:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 01:30:46,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070625426] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:30:46,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:30:46,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 32 [2021-12-17 01:30:46,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175420806] [2021-12-17 01:30:46,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:30:46,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 01:30:46,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:30:46,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 01:30:46,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-12-17 01:30:46,141 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 32 states, 32 states have (on average 3.53125) internal successors, (113), 32 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:30:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:30:46,886 INFO L93 Difference]: Finished difference Result 197 states and 218 transitions. [2021-12-17 01:30:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-17 01:30:46,886 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.53125) internal successors, (113), 32 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-17 01:30:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:30:46,887 INFO L225 Difference]: With dead ends: 197 [2021-12-17 01:30:46,887 INFO L226 Difference]: Without dead ends: 122 [2021-12-17 01:30:46,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 106 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=347, Invalid=3435, Unknown=0, NotChecked=0, Total=3782 [2021-12-17 01:30:46,890 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 106 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:30:46,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 286 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1203 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2021-12-17 01:30:46,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-17 01:30:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 72. [2021-12-17 01:30:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:30:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-12-17 01:30:46,896 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 62 [2021-12-17 01:30:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:30:46,897 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-12-17 01:30:46,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.53125) internal successors, (113), 32 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:30:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-12-17 01:30:46,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 01:30:46,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:30:46,898 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:30:46,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 01:30:47,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:30:47,122 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:30:47,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:30:47,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1352149736, now seen corresponding path program 14 times [2021-12-17 01:30:47,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:30:47,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680014508] [2021-12-17 01:30:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:30:47,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:30:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:30:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:30:47,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:30:47,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680014508] [2021-12-17 01:30:47,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680014508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:30:47,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778017492] [2021-12-17 01:30:47,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:30:47,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:30:47,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:30:47,475 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:30:47,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 01:30:47,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:30:47,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:30:47,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-17 01:30:47,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:30:47,662 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 38 treesize of output 18 [2021-12-17 01:30:47,709 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:30:47,710 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 27 treesize of output 26 [2021-12-17 01:30:47,748 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:30:47,749 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 27 treesize of output 26 [2021-12-17 01:30:47,886 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 21 treesize of output 9 [2021-12-17 01:30:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 01:30:47,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:31:28,536 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_330| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_330| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_730 Int) (|v_ULTIMATE.start_main_~i~0#1_329| Int) (v_ArrVal_732 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_330| 4)) v_ArrVal_730) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_329| 4)) v_ArrVal_732) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0) (< |v_ULTIMATE.start_main_~i~0#1_329| (+ |v_ULTIMATE.start_main_~i~0#1_330| 1)))))) is different from false [2021-12-17 01:32:05,588 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 52 treesize of output 46 [2021-12-17 01:32:05,604 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:32:05,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1059 treesize of output 845 [2021-12-17 01:32:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 85 refuted. 11 times theorem prover too weak. 49 trivial. 6 not checked. [2021-12-17 01:32:05,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778017492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:32:05,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:32:05,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 19] total 39 [2021-12-17 01:32:05,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522606043] [2021-12-17 01:32:05,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:32:05,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 01:32:05,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:32:05,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 01:32:05,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1198, Unknown=55, NotChecked=72, Total=1482 [2021-12-17 01:32:05,825 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:32:14,133 WARN L838 $PredicateComparison]: unable to prove that (and (= 16 (* 4 |c_ULTIMATE.start_main_~i~0#1|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_330| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_330| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_730 Int) (|v_ULTIMATE.start_main_~i~0#1_329| Int) (v_ArrVal_732 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_330| 4)) v_ArrVal_730) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_329| 4)) v_ArrVal_732) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0) (< |v_ULTIMATE.start_main_~i~0#1_329| (+ |v_ULTIMATE.start_main_~i~0#1_330| 1)))))) (<= (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 1) c_~N~0)) is different from false [2021-12-17 01:32:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:32:28,760 INFO L93 Difference]: Finished difference Result 163 states and 183 transitions. [2021-12-17 01:32:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-17 01:32:28,760 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 01:32:28,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:32:28,761 INFO L225 Difference]: With dead ends: 163 [2021-12-17 01:32:28,761 INFO L226 Difference]: Without dead ends: 161 [2021-12-17 01:32:28,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 109 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 100.3s TimeCoverageRelationStatistics Valid=456, Invalid=4312, Unknown=70, NotChecked=274, Total=5112 [2021-12-17 01:32:28,762 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 125 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 01:32:28,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 405 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1183 Invalid, 0 Unknown, 317 Unchecked, 0.5s Time] [2021-12-17 01:32:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-17 01:32:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 102. [2021-12-17 01:32:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:32:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2021-12-17 01:32:28,770 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 63 [2021-12-17 01:32:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:32:28,770 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2021-12-17 01:32:28,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:32:28,771 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2021-12-17 01:32:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 01:32:28,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:32:28,771 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:32:28,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 01:32:28,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:32:28,989 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:32:28,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:32:28,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1771384676, now seen corresponding path program 4 times [2021-12-17 01:32:28,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:32:28,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629111698] [2021-12-17 01:32:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:32:28,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:32:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:32:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 1 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:32:29,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:32:29,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629111698] [2021-12-17 01:32:29,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629111698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:32:29,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898873847] [2021-12-17 01:32:29,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:32:29,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:32:29,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:32:29,474 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:32:29,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 01:32:29,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:32:29,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:32:29,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 01:32:29,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:32:29,619 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 15 treesize of output 11 [2021-12-17 01:32:29,701 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:32:29,701 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 27 treesize of output 26 [2021-12-17 01:32:29,764 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:32:29,765 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 27 treesize of output 26 [2021-12-17 01:32:29,942 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 23 treesize of output 7 [2021-12-17 01:32:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 01:32:29,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:33:02,642 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_797 Int) (v_ArrVal_796 Int) (|v_ULTIMATE.start_main_~i~0#1_352| Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_796) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_352| 4)) v_ArrVal_797) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0) (< |v_ULTIMATE.start_main_~i~0#1_352| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-17 01:33:04,668 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_353| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_353| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_797 Int) (v_ArrVal_796 Int) (|v_ULTIMATE.start_main_~i~0#1_352| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_352| (+ |v_ULTIMATE.start_main_~i~0#1_353| 1)) (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_353| 4)) v_ArrVal_796) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_352| 4)) v_ArrVal_797) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0))))) is different from false [2021-12-17 01:33:04,677 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 30 treesize of output 28 [2021-12-17 01:33:04,680 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 378 treesize of output 370 [2021-12-17 01:33:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 49 trivial. 19 not checked. [2021-12-17 01:33:04,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898873847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:33:04,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:33:04,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16, 18] total 41 [2021-12-17 01:33:04,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14418849] [2021-12-17 01:33:04,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:33:04,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 01:33:04,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:33:04,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 01:33:04,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1276, Unknown=16, NotChecked=150, Total=1640 [2021-12-17 01:33:04,838 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:33:07,305 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (<= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0))) (and .cse0 (<= 4 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (<= 7 c_~N~0) (forall ((|v_ULTIMATE.start_main_~i~0#1_353| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_353| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_797 Int) (v_ArrVal_796 Int) (|v_ULTIMATE.start_main_~i~0#1_352| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_352| (+ |v_ULTIMATE.start_main_~i~0#1_353| 1)) (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_353| 4)) v_ArrVal_796) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_352| 4)) v_ArrVal_797) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0))))) (or (<= (+ |c_ULTIMATE.start_main_~i~0#1| 4) c_~N~0) (and (= 16 (* 4 |c_ULTIMATE.start_main_~i~0#1|)) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 3) c_~N~0) .cse0)))) is different from false [2021-12-17 01:33:07,793 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~i~0#1_340| Int)) (and (<= 4 |v_ULTIMATE.start_main_~i~0#1_340|) (<= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_340| 4))) c_~N~0) (<= |v_ULTIMATE.start_main_~i~0#1_340| 4) (<= (+ |v_ULTIMATE.start_main_~i~0#1_340| 1) |c_ULTIMATE.start_main_~i~0#1|))) (forall ((v_ArrVal_797 Int) (v_ArrVal_796 Int) (|v_ULTIMATE.start_main_~i~0#1_352| Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_796) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_352| 4)) v_ArrVal_797) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0) (< |v_ULTIMATE.start_main_~i~0#1_352| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (or (<= (+ |c_ULTIMATE.start_main_~i~0#1| 3) c_~N~0) (and (<= (+ |c_ULTIMATE.start_main_~i~0#1| 2) c_~N~0) (not (= 20 (* 4 c_~N~0))) (not (= (* 4 |c_ULTIMATE.start_main_~i~0#1|) 16)) (<= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0)))) is different from false [2021-12-17 01:33:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:33:08,954 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2021-12-17 01:33:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-17 01:33:08,954 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 01:33:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:33:08,955 INFO L225 Difference]: With dead ends: 169 [2021-12-17 01:33:08,955 INFO L226 Difference]: Without dead ends: 167 [2021-12-17 01:33:08,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 124 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=910, Invalid=7644, Unknown=18, NotChecked=740, Total=9312 [2021-12-17 01:33:08,956 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 220 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 01:33:08,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 560 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1381 Invalid, 0 Unknown, 420 Unchecked, 0.6s Time] [2021-12-17 01:33:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-17 01:33:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 99. [2021-12-17 01:33:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 98 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:33:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2021-12-17 01:33:08,964 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 63 [2021-12-17 01:33:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:33:08,964 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2021-12-17 01:33:08,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:33:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2021-12-17 01:33:08,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 01:33:08,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:33:08,965 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:33:08,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-17 01:33:09,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:33:09,170 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:33:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:33:09,170 INFO L85 PathProgramCache]: Analyzing trace with hash 96093272, now seen corresponding path program 5 times [2021-12-17 01:33:09,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:33:09,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218663391] [2021-12-17 01:33:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:33:09,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:33:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:33:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 1 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:33:09,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:33:09,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218663391] [2021-12-17 01:33:09,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218663391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:33:09,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597215034] [2021-12-17 01:33:09,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:33:09,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:33:09,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:33:09,675 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:33:09,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 01:33:09,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-17 01:33:09,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:33:09,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 01:33:09,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:33:09,995 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 15 treesize of output 11 [2021-12-17 01:33:10,090 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:33:10,091 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 27 treesize of output 26 [2021-12-17 01:33:10,156 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-17 01:33:10,156 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 27 treesize of output 26 [2021-12-17 01:33:10,447 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 23 treesize of output 7 [2021-12-17 01:33:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 01:33:10,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:34:16,611 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_376| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_376| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_862 Int) (|v_ULTIMATE.start_main_~i~0#1_375| Int) (v_ArrVal_864 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_376| 4)) v_ArrVal_862) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_375| 4)) v_ArrVal_864) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0) (< |v_ULTIMATE.start_main_~i~0#1_375| (+ |v_ULTIMATE.start_main_~i~0#1_376| 1)))))) is different from false [2021-12-17 01:34:16,622 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 30 treesize of output 28 [2021-12-17 01:34:16,624 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 178 treesize of output 174 [2021-12-17 01:34:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 88 refuted. 8 times theorem prover too weak. 49 trivial. 6 not checked. [2021-12-17 01:34:16,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597215034] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:34:16,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:34:16,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16, 18] total 48 [2021-12-17 01:34:16,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303375788] [2021-12-17 01:34:16,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:34:16,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-17 01:34:16,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:34:16,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-17 01:34:16,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1894, Unknown=52, NotChecked=90, Total=2256 [2021-12-17 01:34:16,732 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand has 48 states, 48 states have (on average 2.8333333333333335) internal successors, (136), 48 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:34:19,210 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (let ((.cse1 (= .cse0 c_~N~0))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_376| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_376| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_862 Int) (|v_ULTIMATE.start_main_~i~0#1_375| Int) (v_ArrVal_864 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_376| 4)) v_ArrVal_862) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_375| 4)) v_ArrVal_864) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0) (< |v_ULTIMATE.start_main_~i~0#1_375| (+ |v_ULTIMATE.start_main_~i~0#1_376| 1)))))) (<= .cse0 c_~N~0) (<= 4 |c_ULTIMATE.start_main_~i~0#1|) .cse1 (<= |c_ULTIMATE.start_main_~i~0#1| 4) (<= 7 c_~N~0) (or (<= (+ |c_ULTIMATE.start_main_~i~0#1| 4) c_~N~0) (and (= 16 (* 4 |c_ULTIMATE.start_main_~i~0#1|)) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 3) c_~N~0) .cse1))))) is different from false [2021-12-17 01:36:09,901 WARN L227 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 01:36:11,904 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_375| Int)) (or (forall ((v_ArrVal_864 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_375| 4)) v_ArrVal_864) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0)) (< |v_ULTIMATE.start_main_~i~0#1_375| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0) (<= 7 c_~N~0) (forall ((v_ArrVal_864 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_864) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0))) is different from false [2021-12-17 01:36:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:36:34,962 INFO L93 Difference]: Finished difference Result 212 states and 236 transitions. [2021-12-17 01:36:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-17 01:36:34,963 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8333333333333335) internal successors, (136), 48 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 01:36:34,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:36:34,963 INFO L225 Difference]: With dead ends: 212 [2021-12-17 01:36:34,963 INFO L226 Difference]: Without dead ends: 210 [2021-12-17 01:36:34,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 115 SyntacticMatches, 11 SemanticMatches, 106 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 3329 ImplicationChecksByTransitivity, 204.2s TimeCoverageRelationStatistics Valid=1148, Invalid=9670, Unknown=114, NotChecked=624, Total=11556 [2021-12-17 01:36:34,965 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 233 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 01:36:34,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 692 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1536 Invalid, 0 Unknown, 490 Unchecked, 0.6s Time] [2021-12-17 01:36:34,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-17 01:36:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 105. [2021-12-17 01:36:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 104 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:36:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2021-12-17 01:36:34,979 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 63 [2021-12-17 01:36:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:36:34,980 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2021-12-17 01:36:34,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8333333333333335) internal successors, (136), 48 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:36:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2021-12-17 01:36:34,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 01:36:34,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:36:34,981 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:36:34,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 01:36:35,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 01:36:35,194 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:36:35,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:36:35,195 INFO L85 PathProgramCache]: Analyzing trace with hash -866727336, now seen corresponding path program 6 times [2021-12-17 01:36:35,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:36:35,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081405874] [2021-12-17 01:36:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:36:35,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:36:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:36:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 95 proven. 71 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 01:36:35,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:36:35,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081405874] [2021-12-17 01:36:35,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081405874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:36:35,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881979989] [2021-12-17 01:36:35,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:36:35,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:36:35,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:36:35,360 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:36:35,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 01:36:35,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-17 01:36:35,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:36:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 01:36:35,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:36:35,889 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 15 treesize of output 11 [2021-12-17 01:36:35,935 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:36:35,936 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 25 treesize of output 24 [2021-12-17 01:36:35,967 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-12-17 01:36:35,967 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 2 case distinctions, treesize of input 33 treesize of output 24 [2021-12-17 01:36:35,993 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-12-17 01:36:35,994 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 2 case distinctions, treesize of input 33 treesize of output 24 [2021-12-17 01:36:36,011 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-12-17 01:36:36,012 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 2 case distinctions, treesize of input 33 treesize of output 24 [2021-12-17 01:36:36,178 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 [2021-12-17 01:36:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 01:36:36,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:36:36,831 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_936 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_936) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)) c_~N~0)) is different from false [2021-12-17 01:36:48,882 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 23 treesize of output 21 [2021-12-17 01:36:48,884 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 178 treesize of output 170 [2021-12-17 01:36:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 64 trivial. 17 not checked. [2021-12-17 01:36:48,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881979989] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:36:48,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:36:48,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 16] total 39 [2021-12-17 01:36:48,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202341352] [2021-12-17 01:36:48,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:36:48,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 01:36:48,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:36:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 01:36:48,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1194, Unknown=6, NotChecked=72, Total=1482 [2021-12-17 01:36:48,956 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 39 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:36:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:36:50,292 INFO L93 Difference]: Finished difference Result 365 states and 414 transitions. [2021-12-17 01:36:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-17 01:36:50,292 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 39 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-17 01:36:50,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:36:50,293 INFO L225 Difference]: With dead ends: 365 [2021-12-17 01:36:50,293 INFO L226 Difference]: Without dead ends: 300 [2021-12-17 01:36:50,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 120 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=810, Invalid=5508, Unknown=6, NotChecked=156, Total=6480 [2021-12-17 01:36:50,294 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 480 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 01:36:50,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 559 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1474 Invalid, 0 Unknown, 159 Unchecked, 0.6s Time] [2021-12-17 01:36:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-17 01:36:50,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 127. [2021-12-17 01:36:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 126 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:36:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-12-17 01:36:50,306 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 69 [2021-12-17 01:36:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:36:50,306 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-12-17 01:36:50,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 39 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:36:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-12-17 01:36:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 01:36:50,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:36:50,307 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:36:50,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 01:36:50,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-17 01:36:50,527 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:36:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:36:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash -695424892, now seen corresponding path program 15 times [2021-12-17 01:36:50,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:36:50,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167139162] [2021-12-17 01:36:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:36:50,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:36:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:36:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:36:51,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:36:51,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167139162] [2021-12-17 01:36:51,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167139162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:36:51,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865831558] [2021-12-17 01:36:51,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:36:51,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:36:51,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:36:51,054 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:36:51,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 01:36:51,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-17 01:36:51,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:36:51,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-17 01:36:51,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:36:51,500 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 38 treesize of output 18 [2021-12-17 01:36:52,188 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:36:52,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2021-12-17 01:36:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 85 proven. 55 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 01:36:52,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:36:52,976 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 41 treesize of output 35 [2021-12-17 01:36:52,980 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-17 01:36:52,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-12-17 01:36:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 60 proven. 80 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 01:36:53,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865831558] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:36:53,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:36:53,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 23, 23] total 62 [2021-12-17 01:36:53,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429391084] [2021-12-17 01:36:53,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:36:53,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-17 01:36:53,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:36:53,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-17 01:36:53,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=3324, Unknown=0, NotChecked=0, Total=3782 [2021-12-17 01:36:53,029 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 62 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:36:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:36:55,544 INFO L93 Difference]: Finished difference Result 290 states and 331 transitions. [2021-12-17 01:36:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-17 01:36:55,544 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-17 01:36:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:36:55,545 INFO L225 Difference]: With dead ends: 290 [2021-12-17 01:36:55,545 INFO L226 Difference]: Without dead ends: 201 [2021-12-17 01:36:55,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5076 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1830, Invalid=16802, Unknown=0, NotChecked=0, Total=18632 [2021-12-17 01:36:55,567 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 141 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:36:55,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 485 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 463 Invalid, 0 Unknown, 236 Unchecked, 0.2s Time] [2021-12-17 01:36:55,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-17 01:36:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 162. [2021-12-17 01:36:55,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.186335403726708) internal successors, (191), 161 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:36:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 191 transitions. [2021-12-17 01:36:55,585 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 191 transitions. Word has length 71 [2021-12-17 01:36:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:36:55,585 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 191 transitions. [2021-12-17 01:36:55,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:36:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 191 transitions. [2021-12-17 01:36:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 01:36:55,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:36:55,586 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:36:55,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-17 01:36:55,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:36:55,796 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:36:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:36:55,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1355559106, now seen corresponding path program 7 times [2021-12-17 01:36:55,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:36:55,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701763728] [2021-12-17 01:36:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:36:55,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:36:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:36:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:36:56,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:36:56,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701763728] [2021-12-17 01:36:56,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701763728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:36:56,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375239952] [2021-12-17 01:36:56,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:36:56,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:36:56,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:36:56,276 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:36:56,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 01:36:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:36:56,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 01:36:56,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:36:56,491 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 38 treesize of output 18 [2021-12-17 01:36:56,767 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 21 treesize of output 9 [2021-12-17 01:36:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 01:36:56,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:36:57,106 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 38 treesize of output 32 [2021-12-17 01:36:57,109 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:36:57,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 35 [2021-12-17 01:36:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 01:36:57,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375239952] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:36:57,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:36:57,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 19, 19] total 47 [2021-12-17 01:36:57,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950761166] [2021-12-17 01:36:57,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:36:57,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-17 01:36:57,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:36:57,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-17 01:36:57,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1967, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 01:36:57,191 INFO L87 Difference]: Start difference. First operand 162 states and 191 transitions. Second operand has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:36:59,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:36:59,001 INFO L93 Difference]: Finished difference Result 255 states and 288 transitions. [2021-12-17 01:36:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-17 01:36:59,001 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-17 01:36:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:36:59,003 INFO L225 Difference]: With dead ends: 255 [2021-12-17 01:36:59,003 INFO L226 Difference]: Without dead ends: 154 [2021-12-17 01:36:59,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1164, Invalid=9756, Unknown=0, NotChecked=0, Total=10920 [2021-12-17 01:36:59,005 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 262 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 2084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 01:36:59,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 410 Invalid, 2084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1760 Invalid, 0 Unknown, 85 Unchecked, 0.6s Time] [2021-12-17 01:36:59,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-17 01:36:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 81. [2021-12-17 01:36:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:36:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-12-17 01:36:59,012 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 71 [2021-12-17 01:36:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:36:59,012 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-12-17 01:36:59,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:36:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-12-17 01:36:59,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 01:36:59,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:36:59,013 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:36:59,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-17 01:36:59,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:36:59,231 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:36:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:36:59,231 INFO L85 PathProgramCache]: Analyzing trace with hash 122414920, now seen corresponding path program 16 times [2021-12-17 01:36:59,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:36:59,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204123761] [2021-12-17 01:36:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:36:59,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:36:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:36:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:36:59,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:36:59,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204123761] [2021-12-17 01:36:59,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204123761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:36:59,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493797622] [2021-12-17 01:36:59,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:36:59,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:36:59,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:36:59,817 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:36:59,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 01:36:59,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:36:59,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:36:59,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 01:36:59,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:37:00,070 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 38 treesize of output 18 [2021-12-17 01:37:00,309 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 21 treesize of output 9 [2021-12-17 01:37:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 01:37:00,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:37:00,689 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 38 treesize of output 32 [2021-12-17 01:37:00,692 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:37:00,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 35 [2021-12-17 01:37:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 01:37:00,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493797622] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:37:00,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:37:00,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 21, 21] total 52 [2021-12-17 01:37:00,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136898856] [2021-12-17 01:37:00,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:37:00,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 01:37:00,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:37:00,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 01:37:00,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2430, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 01:37:00,781 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 52 states, 52 states have (on average 3.2884615384615383) internal successors, (171), 52 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:37:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:37:03,428 INFO L93 Difference]: Finished difference Result 145 states and 159 transitions. [2021-12-17 01:37:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-17 01:37:03,429 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.2884615384615383) internal successors, (171), 52 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-17 01:37:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:37:03,429 INFO L225 Difference]: With dead ends: 145 [2021-12-17 01:37:03,429 INFO L226 Difference]: Without dead ends: 143 [2021-12-17 01:37:03,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1339, Invalid=12233, Unknown=0, NotChecked=0, Total=13572 [2021-12-17 01:37:03,431 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 333 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 01:37:03,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 535 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 2390 Invalid, 0 Unknown, 101 Unchecked, 0.9s Time] [2021-12-17 01:37:03,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-17 01:37:03,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 85. [2021-12-17 01:37:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.130952380952381) internal successors, (95), 84 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:37:03,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-12-17 01:37:03,439 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 80 [2021-12-17 01:37:03,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:37:03,439 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-12-17 01:37:03,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.2884615384615383) internal successors, (171), 52 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:37:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-12-17 01:37:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 01:37:03,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:37:03,440 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:37:03,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-17 01:37:03,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 01:37:03,645 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:37:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:37:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash 769982078, now seen corresponding path program 17 times [2021-12-17 01:37:03,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:37:03,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041908565] [2021-12-17 01:37:03,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:37:03,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:37:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:37:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 99 proven. 93 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-17 01:37:03,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:37:03,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041908565] [2021-12-17 01:37:03,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041908565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:37:03,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383937184] [2021-12-17 01:37:03,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:37:03,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:37:03,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:37:03,805 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:37:03,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-17 01:37:04,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-17 01:37:04,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:37:04,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 01:37:04,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:37:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-17 01:37:04,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:37:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-17 01:37:04,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383937184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:37:04,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:37:04,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-12-17 01:37:04,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782837829] [2021-12-17 01:37:04,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:37:04,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 01:37:04,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:37:04,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 01:37:04,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-12-17 01:37:04,517 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:37:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:37:04,794 INFO L93 Difference]: Finished difference Result 202 states and 227 transitions. [2021-12-17 01:37:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 01:37:04,794 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-17 01:37:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:37:04,795 INFO L225 Difference]: With dead ends: 202 [2021-12-17 01:37:04,795 INFO L226 Difference]: Without dead ends: 101 [2021-12-17 01:37:04,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 01:37:04,796 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 431 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:37:04,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 129 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 01:37:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-17 01:37:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2021-12-17 01:37:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:37:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2021-12-17 01:37:04,812 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 84 [2021-12-17 01:37:04,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:37:04,813 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2021-12-17 01:37:04,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:37:04,813 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2021-12-17 01:37:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-17 01:37:04,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:37:04,814 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:37:04,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-17 01:37:05,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-17 01:37:05,033 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:37:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:37:05,033 INFO L85 PathProgramCache]: Analyzing trace with hash 910882804, now seen corresponding path program 18 times [2021-12-17 01:37:05,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:37:05,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041684881] [2021-12-17 01:37:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:37:05,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:37:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:37:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:37:05,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:37:05,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041684881] [2021-12-17 01:37:05,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041684881] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:37:05,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283859212] [2021-12-17 01:37:05,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:37:05,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:37:05,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:37:05,680 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:37:05,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-17 01:37:06,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-17 01:37:06,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:37:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 01:37:06,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:37:06,728 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 38 treesize of output 18 [2021-12-17 01:37:07,635 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:37:07,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2021-12-17 01:37:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 145 proven. 89 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-17 01:37:07,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:37:08,589 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 41 treesize of output 35 [2021-12-17 01:37:08,593 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-17 01:37:08,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-12-17 01:37:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 112 proven. 122 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-17 01:37:08,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283859212] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:37:08,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:37:08,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 27, 27] total 74 [2021-12-17 01:37:08,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808777931] [2021-12-17 01:37:08,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:37:08,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-17 01:37:08,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:37:08,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-17 01:37:08,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=4784, Unknown=0, NotChecked=0, Total=5402 [2021-12-17 01:37:08,642 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 74 states, 74 states have (on average 2.5675675675675675) internal successors, (190), 74 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:37:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:37:12,247 INFO L93 Difference]: Finished difference Result 300 states and 331 transitions. [2021-12-17 01:37:12,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-12-17 01:37:12,247 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.5675675675675675) internal successors, (190), 74 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-17 01:37:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:37:12,252 INFO L225 Difference]: With dead ends: 300 [2021-12-17 01:37:12,252 INFO L226 Difference]: Without dead ends: 160 [2021-12-17 01:37:12,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7816 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3029, Invalid=25027, Unknown=0, NotChecked=0, Total=28056 [2021-12-17 01:37:12,254 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 133 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 579 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 01:37:12,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 671 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 606 Invalid, 0 Unknown, 579 Unchecked, 0.3s Time] [2021-12-17 01:37:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-17 01:37:12,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 122. [2021-12-17 01:37:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 121 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:37:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2021-12-17 01:37:12,286 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 89 [2021-12-17 01:37:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:37:12,287 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2021-12-17 01:37:12,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.5675675675675675) internal successors, (190), 74 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:37:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2021-12-17 01:37:12,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 01:37:12,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:37:12,288 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:37:12,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-17 01:37:12,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-17 01:37:12,492 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:37:12,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:37:12,492 INFO L85 PathProgramCache]: Analyzing trace with hash -580569030, now seen corresponding path program 8 times [2021-12-17 01:37:12,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:37:12,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466748154] [2021-12-17 01:37:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:37:12,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:37:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:37:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 120 proven. 106 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 01:37:12,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:37:12,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466748154] [2021-12-17 01:37:12,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466748154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:37:12,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828172059] [2021-12-17 01:37:12,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:37:12,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:37:12,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:37:12,684 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:37:12,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-17 01:37:12,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:37:12,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:37:12,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 01:37:12,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:37:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 01:37:13,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:37:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 01:37:13,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828172059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:37:13,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:37:13,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-12-17 01:37:13,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188870634] [2021-12-17 01:37:13,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:37:13,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 01:37:13,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:37:13,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 01:37:13,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 01:37:13,265 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:37:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:37:13,542 INFO L93 Difference]: Finished difference Result 212 states and 246 transitions. [2021-12-17 01:37:13,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 01:37:13,542 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-17 01:37:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:37:13,543 INFO L225 Difference]: With dead ends: 212 [2021-12-17 01:37:13,543 INFO L226 Difference]: Without dead ends: 112 [2021-12-17 01:37:13,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 01:37:13,544 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 286 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:37:13,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 76 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 01:37:13,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-17 01:37:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 95. [2021-12-17 01:37:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 94 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:37:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2021-12-17 01:37:13,553 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 92 [2021-12-17 01:37:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:37:13,553 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2021-12-17 01:37:13,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:37:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2021-12-17 01:37:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-17 01:37:13,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:37:13,554 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:37:13,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-17 01:37:13,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-17 01:37:13,755 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:37:13,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:37:13,755 INFO L85 PathProgramCache]: Analyzing trace with hash 230048378, now seen corresponding path program 19 times [2021-12-17 01:37:13,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:37:13,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834121890] [2021-12-17 01:37:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:37:13,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:37:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:37:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:37:14,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:37:14,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834121890] [2021-12-17 01:37:14,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834121890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:37:14,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142416805] [2021-12-17 01:37:14,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:37:14,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:37:14,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:37:14,202 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:37:14,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-17 01:37:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:37:14,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 01:37:14,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:37:14,433 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 38 treesize of output 18 [2021-12-17 01:37:14,470 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:37:14,470 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 27 treesize of output 26 [2021-12-17 01:37:14,729 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 21 treesize of output 9 [2021-12-17 01:37:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-17 01:37:14,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:38:08,980 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 45 treesize of output 39 [2021-12-17 01:38:08,984 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:38:08,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 89 [2021-12-17 01:38:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 265 refuted. 8 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-17 01:38:09,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142416805] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:38:09,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:38:09,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 25] total 49 [2021-12-17 01:38:09,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860938686] [2021-12-17 01:38:09,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:38:09,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 01:38:09,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:38:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 01:38:09,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2133, Unknown=38, NotChecked=0, Total=2352 [2021-12-17 01:38:09,123 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 49 states, 49 states have (on average 3.5510204081632653) internal successors, (174), 49 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:38:21,743 INFO L93 Difference]: Finished difference Result 175 states and 193 transitions. [2021-12-17 01:38:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-17 01:38:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.5510204081632653) internal successors, (174), 49 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-12-17 01:38:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:38:21,744 INFO L225 Difference]: With dead ends: 175 [2021-12-17 01:38:21,744 INFO L226 Difference]: Without dead ends: 173 [2021-12-17 01:38:21,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 170 SyntacticMatches, 24 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 66.1s TimeCoverageRelationStatistics Valid=583, Invalid=8111, Unknown=48, NotChecked=0, Total=8742 [2021-12-17 01:38:21,745 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 194 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 3190 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 3720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 3190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:38:21,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 799 Invalid, 3720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 3190 Invalid, 0 Unknown, 372 Unchecked, 1.2s Time] [2021-12-17 01:38:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-17 01:38:21,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 99. [2021-12-17 01:38:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 98 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-12-17 01:38:21,760 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 94 [2021-12-17 01:38:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:38:21,760 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-12-17 01:38:21,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.5510204081632653) internal successors, (174), 49 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-12-17 01:38:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 01:38:21,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:38:21,761 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:38:21,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-17 01:38:21,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:38:21,975 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:38:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:38:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash -194350928, now seen corresponding path program 20 times [2021-12-17 01:38:21,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:38:21,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227800997] [2021-12-17 01:38:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:38:21,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:38:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:38:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:38:22,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:38:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227800997] [2021-12-17 01:38:22,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227800997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:38:22,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047928443] [2021-12-17 01:38:22,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:38:22,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:38:22,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:38:22,661 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:38:22,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-17 01:38:22,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:38:22,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:38:22,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-17 01:38:22,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:38:22,993 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 38 treesize of output 18 [2021-12-17 01:38:23,412 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 21 treesize of output 9 [2021-12-17 01:38:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-17 01:38:23,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:38:23,924 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 38 treesize of output 32 [2021-12-17 01:38:23,927 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:38:23,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 35 [2021-12-17 01:38:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-17 01:38:24,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047928443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:38:24,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:38:24,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 25, 25] total 62 [2021-12-17 01:38:24,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504406934] [2021-12-17 01:38:24,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:38:24,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-17 01:38:24,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:38:24,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-17 01:38:24,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-12-17 01:38:24,044 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:38:27,140 INFO L93 Difference]: Finished difference Result 173 states and 189 transitions. [2021-12-17 01:38:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-17 01:38:27,140 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-17 01:38:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:38:27,141 INFO L225 Difference]: With dead ends: 173 [2021-12-17 01:38:27,141 INFO L226 Difference]: Without dead ends: 171 [2021-12-17 01:38:27,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 166 SyntacticMatches, 7 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4976 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1710, Invalid=18030, Unknown=0, NotChecked=0, Total=19740 [2021-12-17 01:38:27,142 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 445 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 3481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:38:27,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 693 Invalid, 3481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 3007 Invalid, 0 Unknown, 109 Unchecked, 1.1s Time] [2021-12-17 01:38:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-17 01:38:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 103. [2021-12-17 01:38:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 102 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) [2021-12-17 01:38:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-12-17 01:38:27,151 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 98 [2021-12-17 01:38:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:38:27,151 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-12-17 01:38:27,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-12-17 01:38:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 01:38:27,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:38:27,152 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:38:27,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-17 01:38:27,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:38:27,366 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:38:27,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:38:27,367 INFO L85 PathProgramCache]: Analyzing trace with hash -330263578, now seen corresponding path program 21 times [2021-12-17 01:38:27,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:38:27,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435628274] [2021-12-17 01:38:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:38:27,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:38:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:38:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 163 proven. 137 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-17 01:38:27,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:38:27,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435628274] [2021-12-17 01:38:27,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435628274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:38:27,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427722835] [2021-12-17 01:38:27,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:38:27,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:38:27,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:38:27,592 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:38:27,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-17 01:38:27,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-17 01:38:27,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:38:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 01:38:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:38:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 200 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-17 01:38:28,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:38:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 200 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-17 01:38:28,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427722835] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:38:28,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:38:28,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2021-12-17 01:38:28,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691468495] [2021-12-17 01:38:28,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:38:28,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-17 01:38:28,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:38:28,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-17 01:38:28,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 01:38:28,467 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 38 states, 38 states have (on average 4.157894736842105) internal successors, (158), 38 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:38:28,840 INFO L93 Difference]: Finished difference Result 242 states and 271 transitions. [2021-12-17 01:38:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 01:38:28,840 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.157894736842105) internal successors, (158), 38 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-17 01:38:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:38:28,841 INFO L225 Difference]: With dead ends: 242 [2021-12-17 01:38:28,841 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 01:38:28,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 01:38:28,842 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 368 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 01:38:28,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 239 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 01:38:28,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 01:38:28,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 108. [2021-12-17 01:38:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1308411214953271) internal successors, (121), 107 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2021-12-17 01:38:28,851 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 102 [2021-12-17 01:38:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:38:28,851 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2021-12-17 01:38:28,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.157894736842105) internal successors, (158), 38 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2021-12-17 01:38:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-17 01:38:28,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:38:28,852 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:38:28,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-17 01:38:29,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-17 01:38:29,054 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:38:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:38:29,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1409534820, now seen corresponding path program 22 times [2021-12-17 01:38:29,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:38:29,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882554566] [2021-12-17 01:38:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:38:29,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:38:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:38:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:38:29,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:38:29,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882554566] [2021-12-17 01:38:29,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882554566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:38:29,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516955919] [2021-12-17 01:38:29,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:38:29,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:38:29,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:38:29,716 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:38:29,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-17 01:38:29,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:38:29,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:38:29,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-17 01:38:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:38:29,945 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 38 treesize of output 18 [2021-12-17 01:38:30,282 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 21 treesize of output 9 [2021-12-17 01:38:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-17 01:38:30,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:38:30,679 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 38 treesize of output 32 [2021-12-17 01:38:30,682 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:38:30,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 35 [2021-12-17 01:38:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-17 01:38:30,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516955919] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:38:30,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:38:30,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 27, 27] total 67 [2021-12-17 01:38:30,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339348007] [2021-12-17 01:38:30,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:38:30,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-17 01:38:30,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:38:30,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-17 01:38:30,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=4113, Unknown=0, NotChecked=0, Total=4422 [2021-12-17 01:38:30,784 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand has 67 states, 67 states have (on average 3.4477611940298507) internal successors, (231), 67 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:38:33,794 INFO L93 Difference]: Finished difference Result 187 states and 204 transitions. [2021-12-17 01:38:33,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-12-17 01:38:33,794 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.4477611940298507) internal successors, (231), 67 states have internal predecessors, (231), 0 states have call successors, (0), 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 107 [2021-12-17 01:38:33,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:38:33,795 INFO L225 Difference]: With dead ends: 187 [2021-12-17 01:38:33,795 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 01:38:33,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 183 SyntacticMatches, 6 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5857 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1906, Invalid=21350, Unknown=0, NotChecked=0, Total=23256 [2021-12-17 01:38:33,797 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 397 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 3875 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 4337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 3875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:38:33,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 843 Invalid, 4337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 3875 Invalid, 0 Unknown, 117 Unchecked, 1.0s Time] [2021-12-17 01:38:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 01:38:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 112. [2021-12-17 01:38:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.1261261261261262) internal successors, (125), 111 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:33,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2021-12-17 01:38:33,816 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 107 [2021-12-17 01:38:33,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:38:33,817 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2021-12-17 01:38:33,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.4477611940298507) internal successors, (231), 67 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:33,817 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2021-12-17 01:38:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 01:38:33,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:38:33,818 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:38:33,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-17 01:38:34,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:38:34,030 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:38:34,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:38:34,030 INFO L85 PathProgramCache]: Analyzing trace with hash -711625574, now seen corresponding path program 23 times [2021-12-17 01:38:34,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:38:34,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167498264] [2021-12-17 01:38:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:38:34,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:38:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:38:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 201 proven. 162 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-17 01:38:34,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:38:34,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167498264] [2021-12-17 01:38:34,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167498264] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:38:34,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389960459] [2021-12-17 01:38:34,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:38:34,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:38:34,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:38:34,284 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:38:34,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-17 01:38:34,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-17 01:38:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:38:34,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 01:38:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:38:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 242 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-17 01:38:35,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:38:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 242 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-17 01:38:35,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389960459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:38:35,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:38:35,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2021-12-17 01:38:35,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916897367] [2021-12-17 01:38:35,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:38:35,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 01:38:35,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:38:35,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 01:38:35,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 01:38:35,517 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:38:35,780 INFO L93 Difference]: Finished difference Result 262 states and 293 transitions. [2021-12-17 01:38:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 01:38:35,781 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-17 01:38:35,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:38:35,781 INFO L225 Difference]: With dead ends: 262 [2021-12-17 01:38:35,781 INFO L226 Difference]: Without dead ends: 128 [2021-12-17 01:38:35,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 01:38:35,782 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 547 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:38:35,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 185 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 01:38:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-17 01:38:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 117. [2021-12-17 01:38:35,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 116 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2021-12-17 01:38:35,798 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 111 [2021-12-17 01:38:35,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:38:35,798 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2021-12-17 01:38:35,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2021-12-17 01:38:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 01:38:35,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:38:35,799 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:38:35,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-17 01:38:36,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:38:36,015 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:38:36,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:38:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1109917208, now seen corresponding path program 24 times [2021-12-17 01:38:36,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:38:36,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301860192] [2021-12-17 01:38:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:38:36,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:38:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:38:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:38:36,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:38:36,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301860192] [2021-12-17 01:38:36,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301860192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:38:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277613211] [2021-12-17 01:38:36,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:38:36,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:38:36,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:38:36,599 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:38:36,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-17 01:38:37,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-17 01:38:37,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:38:37,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 01:38:37,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:38:37,779 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 38 treesize of output 18 [2021-12-17 01:38:38,798 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:38:38,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2021-12-17 01:38:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 231 proven. 221 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-17 01:38:38,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:38:39,871 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 73 treesize of output 63 [2021-12-17 01:38:39,878 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-17 01:38:39,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 79 [2021-12-17 01:38:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-17 01:38:39,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277613211] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:38:39,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:38:39,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 75 [2021-12-17 01:38:39,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738260876] [2021-12-17 01:38:39,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:38:39,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-17 01:38:39,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:38:39,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-17 01:38:39,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=4894, Unknown=0, NotChecked=0, Total=5550 [2021-12-17 01:38:39,958 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 75 states, 75 states have (on average 3.3866666666666667) internal successors, (254), 75 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:38:42,009 INFO L93 Difference]: Finished difference Result 245 states and 263 transitions. [2021-12-17 01:38:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-17 01:38:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.3866666666666667) internal successors, (254), 75 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-17 01:38:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:38:42,010 INFO L225 Difference]: With dead ends: 245 [2021-12-17 01:38:42,010 INFO L226 Difference]: Without dead ends: 146 [2021-12-17 01:38:42,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 210 SyntacticMatches, 12 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4046 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1656, Invalid=16976, Unknown=0, NotChecked=0, Total=18632 [2021-12-17 01:38:42,011 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 61 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 01:38:42,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 900 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1716 Invalid, 0 Unknown, 295 Unchecked, 0.5s Time] [2021-12-17 01:38:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-17 01:38:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2021-12-17 01:38:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.134453781512605) internal successors, (135), 119 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:42,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2021-12-17 01:38:42,028 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 116 [2021-12-17 01:38:42,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:38:42,028 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2021-12-17 01:38:42,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.3866666666666667) internal successors, (254), 75 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2021-12-17 01:38:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 01:38:42,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:38:42,029 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:38:42,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-17 01:38:42,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-17 01:38:42,245 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:38:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:38:42,246 INFO L85 PathProgramCache]: Analyzing trace with hash -870303268, now seen corresponding path program 25 times [2021-12-17 01:38:42,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:38:42,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329532182] [2021-12-17 01:38:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:38:42,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:38:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:38:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 213 proven. 178 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-17 01:38:42,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:38:42,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329532182] [2021-12-17 01:38:42,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329532182] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:38:42,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567248170] [2021-12-17 01:38:42,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:38:42,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:38:42,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:38:42,464 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:38:42,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-17 01:38:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:38:42,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 01:38:42,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:38:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-17 01:38:43,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:38:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-17 01:38:43,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567248170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:38:43,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:38:43,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2021-12-17 01:38:43,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971671187] [2021-12-17 01:38:43,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:38:43,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-17 01:38:43,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:38:43,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-17 01:38:43,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 01:38:43,296 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:38:43,645 INFO L93 Difference]: Finished difference Result 229 states and 260 transitions. [2021-12-17 01:38:43,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 01:38:43,646 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-17 01:38:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:38:43,646 INFO L225 Difference]: With dead ends: 229 [2021-12-17 01:38:43,646 INFO L226 Difference]: Without dead ends: 139 [2021-12-17 01:38:43,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 01:38:43,647 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 495 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:38:43,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 84 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 01:38:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-17 01:38:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 122. [2021-12-17 01:38:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 121 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:43,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2021-12-17 01:38:43,657 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 119 [2021-12-17 01:38:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:38:43,658 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2021-12-17 01:38:43,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:38:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2021-12-17 01:38:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 01:38:43,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:38:43,659 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:38:43,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-17 01:38:43,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-17 01:38:43,877 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:38:43,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:38:43,877 INFO L85 PathProgramCache]: Analyzing trace with hash 845014686, now seen corresponding path program 26 times [2021-12-17 01:38:43,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:38:43,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150583656] [2021-12-17 01:38:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:38:43,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:38:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:38:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:38:44,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:38:44,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150583656] [2021-12-17 01:38:44,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150583656] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:38:44,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957677136] [2021-12-17 01:38:44,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:38:44,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:38:44,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:38:44,780 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:38:44,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-17 01:38:44,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:38:44,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:38:44,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-17 01:38:44,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:38:45,292 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 38 treesize of output 18 [2021-12-17 01:38:45,363 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:38:45,363 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 25 treesize of output 24 [2021-12-17 01:38:45,904 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 [2021-12-17 01:38:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-17 01:38:45,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:39:15,751 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1005| Int) (v_ArrVal_2122 Int) (v_ArrVal_2123 Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (<= (select (store (store .cse0 .cse1 v_ArrVal_2122) (+ (* |v_ULTIMATE.start_main_~i~0#1_1005| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2123) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 44)) (+ |c_ULTIMATE.start_main_#t~mem9#1| 1)) (< |v_ULTIMATE.start_main_~i~0#1_1005| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< (select .cse0 .cse1) v_ArrVal_2122)))) is different from false [2021-12-17 01:39:15,771 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 45 treesize of output 39 [2021-12-17 01:39:15,775 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 01:39:15,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 89 [2021-12-17 01:39:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 475 refuted. 2 times theorem prover too weak. 169 trivial. 12 not checked. [2021-12-17 01:39:15,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957677136] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:39:15,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:39:15,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30, 31] total 77 [2021-12-17 01:39:15,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736390100] [2021-12-17 01:39:15,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:39:15,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-17 01:39:15,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:39:15,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-17 01:39:15,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=5389, Unknown=16, NotChecked=148, Total=5852 [2021-12-17 01:39:15,890 INFO L87 Difference]: Start difference. First operand 122 states and 137 transitions. Second operand has 77 states, 77 states have (on average 3.4545454545454546) internal successors, (266), 77 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:39:19,466 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((v_ArrVal_2123 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2123) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 44)) c_~N~0)) (= 48 (+ (* 4 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_1005| Int)) (or (forall ((v_ArrVal_2123 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1005| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2123) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 44)) c_~N~0)) (< |v_ULTIMATE.start_main_~i~0#1_1005| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-17 01:39:25,873 WARN L838 $PredicateComparison]: unable to prove that (and (<= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0) (<= 1 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|) (= |c_ULTIMATE.start_main_~i~0#1| 11) (forall ((|v_ULTIMATE.start_main_~i~0#1_1005| Int)) (or (forall ((v_ArrVal_2123 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1005| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2123) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 44)) c_~N~0)) (< |v_ULTIMATE.start_main_~i~0#1_1005| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-17 01:39:26,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:39:26,044 INFO L93 Difference]: Finished difference Result 270 states and 292 transitions. [2021-12-17 01:39:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-17 01:39:26,045 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.4545454545454546) internal successors, (266), 77 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-17 01:39:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:39:26,046 INFO L225 Difference]: With dead ends: 270 [2021-12-17 01:39:26,046 INFO L226 Difference]: Without dead ends: 268 [2021-12-17 01:39:26,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 203 SyntacticMatches, 21 SemanticMatches, 157 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 7839 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=1112, Invalid=23061, Unknown=19, NotChecked=930, Total=25122 [2021-12-17 01:39:26,047 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 387 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 4656 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 5309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 4656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 01:39:26,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1245 Invalid, 5309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 4656 Invalid, 0 Unknown, 303 Unchecked, 1.6s Time] [2021-12-17 01:39:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-17 01:39:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 133. [2021-12-17 01:39:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.143939393939394) internal successors, (151), 132 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:39:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 151 transitions. [2021-12-17 01:39:26,062 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 151 transitions. Word has length 121 [2021-12-17 01:39:26,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:39:26,062 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 151 transitions. [2021-12-17 01:39:26,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.4545454545454546) internal successors, (266), 77 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:39:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 151 transitions. [2021-12-17 01:39:26,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 01:39:26,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:39:26,063 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:39:26,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-17 01:39:26,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-17 01:39:26,267 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:39:26,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:39:26,268 INFO L85 PathProgramCache]: Analyzing trace with hash -307552418, now seen corresponding path program 9 times [2021-12-17 01:39:26,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:39:26,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646005928] [2021-12-17 01:39:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:39:26,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:39:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:39:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 657 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:39:26,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:39:26,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646005928] [2021-12-17 01:39:26,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646005928] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:39:26,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976228184] [2021-12-17 01:39:26,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:39:26,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:39:26,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:39:26,763 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:39:26,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-17 01:39:27,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-17 01:39:27,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:39:27,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-17 01:39:27,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:39:27,747 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 15 treesize of output 11 [2021-12-17 01:39:27,836 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-17 01:39:27,836 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 28 treesize of output 27 [2021-12-17 01:39:29,160 INFO L354 Elim1Store]: treesize reduction 50, result has 5.7 percent of original size [2021-12-17 01:39:29,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 39 [2021-12-17 01:39:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 291 proven. 180 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-17 01:39:29,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:39:31,232 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 27 treesize of output 25 [2021-12-17 01:39:31,235 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 66 treesize of output 59 [2021-12-17 01:39:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 180 proven. 291 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-17 01:39:31,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976228184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:39:31,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:39:31,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 36, 36] total 84 [2021-12-17 01:39:31,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368720113] [2021-12-17 01:39:31,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:39:31,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-17 01:39:31,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:39:31,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-17 01:39:31,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=848, Invalid=6123, Unknown=1, NotChecked=0, Total=6972 [2021-12-17 01:39:31,877 INFO L87 Difference]: Start difference. First operand 133 states and 151 transitions. Second operand has 84 states, 84 states have (on average 3.119047619047619) internal successors, (262), 84 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:39:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:39:49,071 INFO L93 Difference]: Finished difference Result 799 states and 875 transitions. [2021-12-17 01:39:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 307 states. [2021-12-17 01:39:49,071 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.119047619047619) internal successors, (262), 84 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-17 01:39:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:39:49,079 INFO L225 Difference]: With dead ends: 799 [2021-12-17 01:39:49,080 INFO L226 Difference]: Without dead ends: 517 [2021-12-17 01:39:49,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 238 SyntacticMatches, 45 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52406 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=9632, Invalid=121770, Unknown=4, NotChecked=0, Total=131406 [2021-12-17 01:39:49,085 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 625 mSDsluCounter, 2310 mSDsCounter, 0 mSdLazyCounter, 6785 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 10628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 6785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3460 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:39:49,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 2388 Invalid, 10628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 6785 Invalid, 0 Unknown, 3460 Unchecked, 2.0s Time] [2021-12-17 01:39:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-12-17 01:39:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 239. [2021-12-17 01:39:49,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.1596638655462186) internal successors, (276), 238 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:39:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 276 transitions. [2021-12-17 01:39:49,115 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 276 transitions. Word has length 121 [2021-12-17 01:39:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:39:49,115 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 276 transitions. [2021-12-17 01:39:49,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.119047619047619) internal successors, (262), 84 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:39:49,116 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 276 transitions. [2021-12-17 01:39:49,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 01:39:49,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:39:49,116 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:39:49,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-17 01:39:49,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:39:49,335 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:39:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:39:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1989894868, now seen corresponding path program 27 times [2021-12-17 01:39:49,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:39:49,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450011562] [2021-12-17 01:39:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:39:49,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:39:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:39:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 121 proven. 583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:39:50,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:39:50,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450011562] [2021-12-17 01:39:50,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450011562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:39:50,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107970687] [2021-12-17 01:39:50,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:39:50,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:39:50,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:39:50,296 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:39:50,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-17 01:39:51,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-17 01:39:51,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:39:51,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 01:39:51,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:39:51,550 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 38 treesize of output 18 [2021-12-17 01:39:52,643 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 01:39:52,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2021-12-17 01:39:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 313 proven. 181 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-17 01:39:52,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:39:53,852 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 41 treesize of output 35 [2021-12-17 01:39:53,856 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-17 01:39:53,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-12-17 01:39:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 264 proven. 230 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-17 01:39:53,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107970687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:39:53,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:39:53,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 35, 35] total 97 [2021-12-17 01:39:53,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665282084] [2021-12-17 01:39:53,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:39:53,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-17 01:39:53,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:39:53,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-17 01:39:53,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=8038, Unknown=0, NotChecked=0, Total=9312 [2021-12-17 01:39:53,999 INFO L87 Difference]: Start difference. First operand 239 states and 276 transitions. Second operand has 97 states, 97 states have (on average 2.7422680412371134) internal successors, (266), 97 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:39:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:40:00,000 INFO L93 Difference]: Finished difference Result 644 states and 709 transitions. [2021-12-17 01:40:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-12-17 01:40:00,000 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.7422680412371134) internal successors, (266), 97 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-17 01:40:00,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:40:00,002 INFO L225 Difference]: With dead ends: 644 [2021-12-17 01:40:00,002 INFO L226 Difference]: Without dead ends: 337 [2021-12-17 01:40:00,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 236 SyntacticMatches, 12 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27185 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=7302, Invalid=62658, Unknown=0, NotChecked=0, Total=69960 [2021-12-17 01:40:00,006 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 558 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 691 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:40:00,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 1017 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 564 Invalid, 0 Unknown, 691 Unchecked, 0.4s Time] [2021-12-17 01:40:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-17 01:40:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 284. [2021-12-17 01:40:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.187279151943463) internal successors, (336), 283 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:40:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 336 transitions. [2021-12-17 01:40:00,042 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 336 transitions. Word has length 125 [2021-12-17 01:40:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:40:00,042 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 336 transitions. [2021-12-17 01:40:00,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.7422680412371134) internal successors, (266), 97 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:40:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 336 transitions. [2021-12-17 01:40:00,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 01:40:00,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:40:00,043 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:40:00,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-17 01:40:00,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-17 01:40:00,264 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:40:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:40:00,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1588115628, now seen corresponding path program 10 times [2021-12-17 01:40:00,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:40:00,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947770390] [2021-12-17 01:40:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:40:00,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:40:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:40:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:40:00,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:40:00,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947770390] [2021-12-17 01:40:00,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947770390] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:40:00,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087210435] [2021-12-17 01:40:00,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:40:00,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:40:00,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:40:00,915 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:40:00,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-17 01:40:01,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:40:01,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:40:01,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-17 01:40:01,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:40:01,258 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 15 treesize of output 11 [2021-12-17 01:40:01,329 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-17 01:40:01,330 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 28 treesize of output 27 [2021-12-17 01:40:01,393 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-12-17 01:40:01,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 34 [2021-12-17 01:40:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-17 01:40:01,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:40:02,300 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 24 treesize of output 22 [2021-12-17 01:40:02,301 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 51 treesize of output 47 [2021-12-17 01:40:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 5 proven. 522 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-17 01:40:02,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087210435] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:40:02,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:40:02,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 30] total 78 [2021-12-17 01:40:02,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896146472] [2021-12-17 01:40:02,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:40:02,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-17 01:40:02,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:40:02,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-17 01:40:02,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=5571, Unknown=0, NotChecked=0, Total=6006 [2021-12-17 01:40:02,714 INFO L87 Difference]: Start difference. First operand 284 states and 336 transitions. Second operand has 78 states, 78 states have (on average 3.5) internal successors, (273), 78 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:40:08,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:40:08,011 INFO L93 Difference]: Finished difference Result 670 states and 752 transitions. [2021-12-17 01:40:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-17 01:40:08,011 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.5) internal successors, (273), 78 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-12-17 01:40:08,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:40:08,013 INFO L225 Difference]: With dead ends: 670 [2021-12-17 01:40:08,013 INFO L226 Difference]: Without dead ends: 595 [2021-12-17 01:40:08,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 205 SyntacticMatches, 16 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6613 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1756, Invalid=24976, Unknown=0, NotChecked=0, Total=26732 [2021-12-17 01:40:08,015 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 271 mSDsluCounter, 3454 mSDsCounter, 0 mSdLazyCounter, 8326 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 3555 SdHoareTripleChecker+Invalid, 8582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 8326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 01:40:08,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 3555 Invalid, 8582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 8326 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 01:40:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-17 01:40:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 288. [2021-12-17 01:40:08,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.181184668989547) internal successors, (339), 287 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:40:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 339 transitions. [2021-12-17 01:40:08,093 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 339 transitions. Word has length 126 [2021-12-17 01:40:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:40:08,093 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 339 transitions. [2021-12-17 01:40:08,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.5) internal successors, (273), 78 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:40:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 339 transitions. [2021-12-17 01:40:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 01:40:08,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:40:08,094 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:40:08,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-17 01:40:08,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-17 01:40:08,307 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:40:08,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:40:08,308 INFO L85 PathProgramCache]: Analyzing trace with hash -655185398, now seen corresponding path program 11 times [2021-12-17 01:40:08,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:40:08,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206414938] [2021-12-17 01:40:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:40:08,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:40:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:40:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 250 proven. 206 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-12-17 01:40:08,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:40:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206414938] [2021-12-17 01:40:08,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206414938] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:40:08,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733060108] [2021-12-17 01:40:08,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:40:08,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:40:08,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:40:08,609 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:40:08,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-17 01:40:09,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-17 01:40:09,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:40:09,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 01:40:09,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:40:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 287 proven. 169 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-12-17 01:40:09,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:40:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 287 proven. 169 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-12-17 01:40:09,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733060108] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:40:09,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:40:09,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2021-12-17 01:40:09,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035134695] [2021-12-17 01:40:09,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:40:09,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-17 01:40:09,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:40:09,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-17 01:40:09,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 01:40:09,936 INFO L87 Difference]: Start difference. First operand 288 states and 339 transitions. Second operand has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 47 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:40:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:40:10,230 INFO L93 Difference]: Finished difference Result 364 states and 417 transitions. [2021-12-17 01:40:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 01:40:10,230 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 47 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-17 01:40:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:40:10,231 INFO L225 Difference]: With dead ends: 364 [2021-12-17 01:40:10,231 INFO L226 Difference]: Without dead ends: 209 [2021-12-17 01:40:10,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 01:40:10,232 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 308 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:40:10,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 102 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 01:40:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-17 01:40:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 144. [2021-12-17 01:40:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 143 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:40:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 163 transitions. [2021-12-17 01:40:10,254 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 163 transitions. Word has length 128 [2021-12-17 01:40:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:40:10,254 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 163 transitions. [2021-12-17 01:40:10,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 47 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:40:10,255 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 163 transitions. [2021-12-17 01:40:10,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-17 01:40:10,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:40:10,255 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:40:10,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-17 01:40:10,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:40:10,469 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:40:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:40:10,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2061235894, now seen corresponding path program 28 times [2021-12-17 01:40:10,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:40:10,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714694477] [2021-12-17 01:40:10,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:40:10,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:40:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:40:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 156 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:40:11,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:40:11,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714694477] [2021-12-17 01:40:11,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714694477] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:40:11,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930885176] [2021-12-17 01:40:11,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:40:11,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:40:11,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:40:11,592 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:40:11,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-17 01:40:11,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:40:11,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:40:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-17 01:40:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:40:12,182 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 38 treesize of output 18 [2021-12-17 01:40:12,265 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-17 01:40:12,265 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 25 treesize of output 24 [2021-12-17 01:40:12,840 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 [2021-12-17 01:40:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-17 01:40:12,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15