./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/gj2007.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/loop-lit/gj2007.i -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 05ff204c30e7b81bf33f8a8c483906be16c1e587 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:45:04,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:45:04,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:45:04,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:45:04,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:45:04,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:45:04,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:45:04,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:45:04,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:45:04,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:45:04,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:45:04,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:45:04,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:45:04,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:45:04,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:45:04,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:45:04,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:45:04,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:45:04,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:45:04,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:45:04,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:45:04,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:45:04,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:45:04,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:45:04,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:45:04,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:45:04,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:45:04,593 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:45:04,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:45:04,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:45:04,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:45:04,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:45:04,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:45:04,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:45:04,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:45:04,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:45:04,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:45:04,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:45:04,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:45:04,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:45:04,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:45:04,603 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:45:04,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:45:04,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:45:04,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:45:04,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:45:04,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:45:04,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:45:04,632 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:45:04,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:45:04,632 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:45:04,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:45:04,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:45:04,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:45:04,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:45:04,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:45:04,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:45:04,634 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:45:04,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:45:04,634 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:45:04,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:45:04,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:45:04,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:45:04,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:45:04,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:45:04,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:45:04,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:45:04,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:45:04,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:45:04,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:45:04,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:45:04,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:45:04,636 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05ff204c30e7b81bf33f8a8c483906be16c1e587 [2021-08-26 03:45:04,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:45:04,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:45:04,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:45:04,886 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:45:04,886 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:45:04,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gj2007.i [2021-08-26 03:45:04,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/132bac56b/15f3d6c4b05f4f668f0fe9887b4b21c1/FLAG54a1a07c5 [2021-08-26 03:45:05,338 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:45:05,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.i [2021-08-26 03:45:05,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/132bac56b/15f3d6c4b05f4f668f0fe9887b4b21c1/FLAG54a1a07c5 [2021-08-26 03:45:05,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/132bac56b/15f3d6c4b05f4f668f0fe9887b4b21c1 [2021-08-26 03:45:05,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:45:05,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:45:05,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:45:05,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:45:05,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:45:05,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:45:05" (1/1) ... [2021-08-26 03:45:05,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51304012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05, skipping insertion in model container [2021-08-26 03:45:05,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:45:05" (1/1) ... [2021-08-26 03:45:05,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:45:05,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:45:05,504 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.i[895,908] [2021-08-26 03:45:05,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:45:05,515 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:45:05,523 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.i[895,908] [2021-08-26 03:45:05,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:45:05,561 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:45:05,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05 WrapperNode [2021-08-26 03:45:05,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:45:05,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:45:05,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:45:05,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:45:05,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05" (1/1) ... [2021-08-26 03:45:05,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05" (1/1) ... [2021-08-26 03:45:05,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:45:05,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:45:05,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:45:05,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:45:05,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05" (1/1) ... [2021-08-26 03:45:05,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05" (1/1) ... [2021-08-26 03:45:05,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05" (1/1) ... [2021-08-26 03:45:05,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05" (1/1) ... [2021-08-26 03:45:05,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05" (1/1) ... [2021-08-26 03:45:05,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05" (1/1) ... [2021-08-26 03:45:05,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05" (1/1) ... [2021-08-26 03:45:05,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:45:05,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:45:05,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:45:05,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:45:05,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05" (1/1) ... [2021-08-26 03:45:05,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:45:05,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:05,629 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) [2021-08-26 03:45:05,630 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 [2021-08-26 03:45:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:45:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:45:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:45:05,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:45:05,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:45:05,855 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-26 03:45:05,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:45:05 BoogieIcfgContainer [2021-08-26 03:45:05,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:45:05,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:45:05,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:45:05,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:45:05,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:45:05" (1/3) ... [2021-08-26 03:45:05,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d767cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:45:05, skipping insertion in model container [2021-08-26 03:45:05,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:05" (2/3) ... [2021-08-26 03:45:05,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d767cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:45:05, skipping insertion in model container [2021-08-26 03:45:05,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:45:05" (3/3) ... [2021-08-26 03:45:05,863 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.i [2021-08-26 03:45:05,869 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:45:05,869 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:45:05,909 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:45:05,915 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-26 03:45:05,915 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:45:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:05,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:45:05,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:05,930 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:45:05,930 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-08-26 03:45:05,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:05,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066948111] [2021-08-26 03:45:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:05,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:06,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:06,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066948111] [2021-08-26 03:45:06,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066948111] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:45:06,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:45:06,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 03:45:06,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966681022] [2021-08-26 03:45:06,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 03:45:06,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:06,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 03:45:06,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:45:06,090 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:06,100 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-08-26 03:45:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 03:45:06,101 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-08-26 03:45:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:06,106 INFO L225 Difference]: With dead ends: 20 [2021-08-26 03:45:06,106 INFO L226 Difference]: Without dead ends: 8 [2021-08-26 03:45:06,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:45:06,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-08-26 03:45:06,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-08-26 03:45:06,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-08-26 03:45:06,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-08-26 03:45:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:06,127 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-08-26 03:45:06,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-08-26 03:45:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:45:06,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:06,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:45:06,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:45:06,129 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-08-26 03:45:06,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:06,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486784371] [2021-08-26 03:45:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:06,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:06,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:06,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486784371] [2021-08-26 03:45:06,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486784371] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:45:06,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:45:06,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:45:06,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117142611] [2021-08-26 03:45:06,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:45:06,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:06,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:45:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:45:06,175 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:06,188 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-08-26 03:45:06,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:45:06,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-08-26 03:45:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:06,198 INFO L225 Difference]: With dead ends: 16 [2021-08-26 03:45:06,198 INFO L226 Difference]: Without dead ends: 10 [2021-08-26 03:45:06,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:45:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-26 03:45:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-26 03:45:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-08-26 03:45:06,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-08-26 03:45:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:06,201 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-08-26 03:45:06,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-08-26 03:45:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 03:45:06,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:06,202 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:06,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 03:45:06,202 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:06,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:06,203 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2021-08-26 03:45:06,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:06,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426132164] [2021-08-26 03:45:06,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:06,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:06,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:06,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426132164] [2021-08-26 03:45:06,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426132164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:06,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107371559] [2021-08-26 03:45:06,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:06,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:06,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:06,253 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) [2021-08-26 03:45:06,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:45:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:06,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 03:45:06,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:06,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107371559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:06,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:06,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-26 03:45:06,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810166292] [2021-08-26 03:45:06,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:45:06,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:06,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:45:06,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:45:06,376 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:06,393 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-08-26 03:45:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:45:06,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-26 03:45:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:06,394 INFO L225 Difference]: With dead ends: 18 [2021-08-26 03:45:06,394 INFO L226 Difference]: Without dead ends: 12 [2021-08-26 03:45:06,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:45:06,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-26 03:45:06,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-26 03:45:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-08-26 03:45:06,396 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-08-26 03:45:06,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:06,396 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-08-26 03:45:06,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,396 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-08-26 03:45:06,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 03:45:06,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:06,397 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:06,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 03:45:06,615 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 [2021-08-26 03:45:06,615 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:06,616 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2021-08-26 03:45:06,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:06,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585339687] [2021-08-26 03:45:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:06,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 03:45:06,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:06,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585339687] [2021-08-26 03:45:06,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585339687] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:45:06,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:45:06,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:45:06,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187495255] [2021-08-26 03:45:06,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:45:06,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:06,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:45:06,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:45:06,648 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:06,657 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-08-26 03:45:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:45:06,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-26 03:45:06,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:06,658 INFO L225 Difference]: With dead ends: 18 [2021-08-26 03:45:06,658 INFO L226 Difference]: Without dead ends: 14 [2021-08-26 03:45:06,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:45:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-26 03:45:06,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-08-26 03:45:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-08-26 03:45:06,661 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-08-26 03:45:06,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:06,661 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-08-26 03:45:06,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,661 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-08-26 03:45:06,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 03:45:06,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:06,662 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:06,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 03:45:06,662 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:06,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:06,663 INFO L82 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2021-08-26 03:45:06,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:06,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282519583] [2021-08-26 03:45:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:06,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:06,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:06,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282519583] [2021-08-26 03:45:06,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282519583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:06,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282519955] [2021-08-26 03:45:06,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:06,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:06,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:06,705 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) [2021-08-26 03:45:06,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:45:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:06,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 03:45:06,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:06,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282519955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:06,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:06,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 03:45:06,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877460114] [2021-08-26 03:45:06,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:45:06,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:06,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:45:06,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:45:06,809 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:06,825 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-08-26 03:45:06,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 03:45:06,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-26 03:45:06,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:06,826 INFO L225 Difference]: With dead ends: 22 [2021-08-26 03:45:06,826 INFO L226 Difference]: Without dead ends: 15 [2021-08-26 03:45:06,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:45:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-26 03:45:06,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-26 03:45:06,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-08-26 03:45:06,829 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-08-26 03:45:06,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:06,829 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-08-26 03:45:06,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:06,829 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-08-26 03:45:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 03:45:06,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:06,829 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:06,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:07,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:07,053 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:07,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 2 times [2021-08-26 03:45:07,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:07,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134007856] [2021-08-26 03:45:07,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:07,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:07,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:07,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134007856] [2021-08-26 03:45:07,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134007856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:07,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302082432] [2021-08-26 03:45:07,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:45:07,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:07,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:07,108 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) [2021-08-26 03:45:07,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 03:45:07,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:45:07,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:07,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 03:45:07,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:07,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302082432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:07,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:07,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-26 03:45:07,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769178661] [2021-08-26 03:45:07,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 03:45:07,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:07,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 03:45:07,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 03:45:07,230 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:07,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:07,248 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-08-26 03:45:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 03:45:07,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-26 03:45:07,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:07,250 INFO L225 Difference]: With dead ends: 24 [2021-08-26 03:45:07,250 INFO L226 Difference]: Without dead ends: 17 [2021-08-26 03:45:07,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 03:45:07,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-26 03:45:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-26 03:45:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-08-26 03:45:07,253 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-08-26 03:45:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:07,254 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-08-26 03:45:07,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-08-26 03:45:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 03:45:07,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:07,254 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:07,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:07,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:07,474 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:07,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 3 times [2021-08-26 03:45:07,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:07,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101112472] [2021-08-26 03:45:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:07,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:07,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:07,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101112472] [2021-08-26 03:45:07,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101112472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:07,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824918631] [2021-08-26 03:45:07,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:45:07,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:07,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:07,524 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) [2021-08-26 03:45:07,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 03:45:07,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 03:45:07,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:07,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 03:45:07,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-26 03:45:07,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824918631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:07,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:07,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-08-26 03:45:07,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270207770] [2021-08-26 03:45:07,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 03:45:07,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 03:45:07,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:45:07,635 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-08-26 03:45:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:07,670 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-08-26 03:45:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:45:07,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) Word has length 16 [2021-08-26 03:45:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:07,672 INFO L225 Difference]: With dead ends: 29 [2021-08-26 03:45:07,672 INFO L226 Difference]: Without dead ends: 22 [2021-08-26 03:45:07,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:45:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-26 03:45:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-08-26 03:45:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 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) [2021-08-26 03:45:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-08-26 03:45:07,678 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-08-26 03:45:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:07,678 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-08-26 03:45:07,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-08-26 03:45:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-08-26 03:45:07,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 03:45:07,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:07,679 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:07,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:07,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:07,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash -885484758, now seen corresponding path program 4 times [2021-08-26 03:45:07,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:07,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207069979] [2021-08-26 03:45:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:07,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:45:07,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:07,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207069979] [2021-08-26 03:45:07,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207069979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:07,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044281511] [2021-08-26 03:45:07,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:45:07,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:07,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:07,936 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) [2021-08-26 03:45:07,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 03:45:07,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:45:07,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:07,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 03:45:07,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:45:08,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044281511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:08,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:08,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-26 03:45:08,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275486344] [2021-08-26 03:45:08,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 03:45:08,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:08,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 03:45:08,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:45:08,075 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-08-26 03:45:08,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:08,102 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-08-26 03:45:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 03:45:08,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) Word has length 20 [2021-08-26 03:45:08,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:08,103 INFO L225 Difference]: With dead ends: 32 [2021-08-26 03:45:08,103 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 03:45:08,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:45:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 03:45:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-26 03:45:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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) [2021-08-26 03:45:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-08-26 03:45:08,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2021-08-26 03:45:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:08,108 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-08-26 03:45:08,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-08-26 03:45:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-08-26 03:45:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 03:45:08,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:08,110 INFO L512 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:08,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:08,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:08,327 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:08,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 5 times [2021-08-26 03:45:08,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:08,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305501786] [2021-08-26 03:45:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:08,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:45:08,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:08,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305501786] [2021-08-26 03:45:08,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305501786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:08,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453255077] [2021-08-26 03:45:08,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:45:08,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:08,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:08,384 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) [2021-08-26 03:45:08,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 03:45:08,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-26 03:45:08,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:08,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 03:45:08,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:45:08,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453255077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:08,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:08,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-26 03:45:08,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648239585] [2021-08-26 03:45:08,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 03:45:08,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:08,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 03:45:08,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:45:08,544 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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) [2021-08-26 03:45:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:08,570 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-08-26 03:45:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:45:08,570 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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) Word has length 22 [2021-08-26 03:45:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:08,570 INFO L225 Difference]: With dead ends: 34 [2021-08-26 03:45:08,570 INFO L226 Difference]: Without dead ends: 25 [2021-08-26 03:45:08,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:45:08,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-26 03:45:08,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-26 03:45:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-08-26 03:45:08,573 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2021-08-26 03:45:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:08,573 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-08-26 03:45:08,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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) [2021-08-26 03:45:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-08-26 03:45:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 03:45:08,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:08,573 INFO L512 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:08,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:08,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:08,780 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:08,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:08,780 INFO L82 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 6 times [2021-08-26 03:45:08,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:08,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526390490] [2021-08-26 03:45:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:08,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:45:08,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:08,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526390490] [2021-08-26 03:45:08,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526390490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:08,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855930670] [2021-08-26 03:45:08,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:45:08,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:08,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:08,869 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) [2021-08-26 03:45:08,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 03:45:08,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-26 03:45:08,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:08,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 03:45:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:09,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855930670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:09,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:09,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-08-26 03:45:09,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778630700] [2021-08-26 03:45:09,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 03:45:09,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 03:45:09,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-26 03:45:09,069 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-08-26 03:45:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:09,115 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-08-26 03:45:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 03:45:09,116 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-26 03:45:09,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:09,117 INFO L225 Difference]: With dead ends: 40 [2021-08-26 03:45:09,117 INFO L226 Difference]: Without dead ends: 31 [2021-08-26 03:45:09,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-26 03:45:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-26 03:45:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-26 03:45:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 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) [2021-08-26 03:45:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-08-26 03:45:09,126 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2021-08-26 03:45:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:09,126 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-08-26 03:45:09,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-08-26 03:45:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-08-26 03:45:09,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 03:45:09,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:09,127 INFO L512 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:09,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:09,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:09,341 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:09,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:09,341 INFO L82 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 7 times [2021-08-26 03:45:09,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:09,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375549760] [2021-08-26 03:45:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:09,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:45:09,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:09,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375549760] [2021-08-26 03:45:09,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375549760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:09,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659727791] [2021-08-26 03:45:09,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:45:09,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:09,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:09,497 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) [2021-08-26 03:45:09,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 03:45:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:09,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 03:45:09,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:45:09,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659727791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:09,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:09,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-26 03:45:09,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778088185] [2021-08-26 03:45:09,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 03:45:09,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:09,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 03:45:09,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:45:09,681 INFO L87 Difference]: Start difference. First operand 31 states and 33 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) [2021-08-26 03:45:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:09,714 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-08-26 03:45:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 03:45:09,715 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 30 [2021-08-26 03:45:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:09,715 INFO L225 Difference]: With dead ends: 42 [2021-08-26 03:45:09,715 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 03:45:09,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:45:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 03:45:09,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-26 03:45:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-08-26 03:45:09,718 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2021-08-26 03:45:09,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:09,719 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-08-26 03:45:09,719 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) [2021-08-26 03:45:09,719 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-08-26 03:45:09,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 03:45:09,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:09,719 INFO L512 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:09,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:09,933 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,SelfDestructingSolverStorable10 [2021-08-26 03:45:09,933 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:09,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 8 times [2021-08-26 03:45:09,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:09,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137641887] [2021-08-26 03:45:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:09,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:45:10,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:10,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137641887] [2021-08-26 03:45:10,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137641887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:10,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274956379] [2021-08-26 03:45:10,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:45:10,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:10,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:10,069 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) [2021-08-26 03:45:10,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 03:45:10,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:45:10,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:10,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 03:45:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:45:10,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274956379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:10,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:10,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-26 03:45:10,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915521675] [2021-08-26 03:45:10,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 03:45:10,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:10,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 03:45:10,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-26 03:45:10,274 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-08-26 03:45:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:10,310 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-08-26 03:45:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 03:45:10,310 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 32 [2021-08-26 03:45:10,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:10,312 INFO L225 Difference]: With dead ends: 44 [2021-08-26 03:45:10,312 INFO L226 Difference]: Without dead ends: 35 [2021-08-26 03:45:10,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-26 03:45:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-26 03:45:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-08-26 03:45:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-08-26 03:45:10,319 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2021-08-26 03:45:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:10,319 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-08-26 03:45:10,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-08-26 03:45:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-08-26 03:45:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 03:45:10,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:10,322 INFO L512 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:10,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:10,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:10,529 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:10,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:10,529 INFO L82 PathProgramCache]: Analyzing trace with hash 653864095, now seen corresponding path program 9 times [2021-08-26 03:45:10,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:10,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626315754] [2021-08-26 03:45:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:10,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:45:10,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:10,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626315754] [2021-08-26 03:45:10,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626315754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:10,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478922572] [2021-08-26 03:45:10,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:45:10,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:10,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:10,658 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) [2021-08-26 03:45:10,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 03:45:10,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-26 03:45:10,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:10,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 03:45:10,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-08-26 03:45:10,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478922572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:10,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:10,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 18 [2021-08-26 03:45:10,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750536964] [2021-08-26 03:45:10,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 03:45:10,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:10,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 03:45:10,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-26 03:45:10,874 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:10,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:10,937 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-08-26 03:45:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 03:45:10,937 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-26 03:45:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:10,938 INFO L225 Difference]: With dead ends: 49 [2021-08-26 03:45:10,938 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 03:45:10,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-26 03:45:10,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 03:45:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-08-26 03:45:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-26 03:45:10,940 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2021-08-26 03:45:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:10,940 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-26 03:45:10,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-26 03:45:10,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 03:45:10,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:10,941 INFO L512 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:10,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:11,164 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,SelfDestructingSolverStorable12 [2021-08-26 03:45:11,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:11,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:11,164 INFO L82 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 10 times [2021-08-26 03:45:11,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:11,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692873107] [2021-08-26 03:45:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:11,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 03:45:11,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:11,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692873107] [2021-08-26 03:45:11,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692873107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:11,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165125446] [2021-08-26 03:45:11,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:45:11,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:11,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:11,307 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) [2021-08-26 03:45:11,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 03:45:11,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:45:11,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:11,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 03:45:11,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 03:45:11,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165125446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:11,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:11,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-26 03:45:11,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124889700] [2021-08-26 03:45:11,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 03:45:11,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 03:45:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-26 03:45:11,548 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:11,588 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-08-26 03:45:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 03:45:11,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-26 03:45:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:11,589 INFO L225 Difference]: With dead ends: 52 [2021-08-26 03:45:11,589 INFO L226 Difference]: Without dead ends: 41 [2021-08-26 03:45:11,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-26 03:45:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-26 03:45:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-08-26 03:45:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-08-26 03:45:11,592 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2021-08-26 03:45:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:11,592 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-08-26 03:45:11,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-08-26 03:45:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-26 03:45:11,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:11,592 INFO L512 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:11,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:11,809 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,SelfDestructingSolverStorable13 [2021-08-26 03:45:11,809 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:11,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:11,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 11 times [2021-08-26 03:45:11,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:11,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552272093] [2021-08-26 03:45:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:11,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 03:45:11,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:11,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552272093] [2021-08-26 03:45:11,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552272093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:11,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599515923] [2021-08-26 03:45:11,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:45:11,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:11,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:11,965 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) [2021-08-26 03:45:11,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 03:45:12,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-26 03:45:12,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:12,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 03:45:12,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 03:45:12,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599515923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:12,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:12,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-26 03:45:12,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855122811] [2021-08-26 03:45:12,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 03:45:12,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:12,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 03:45:12,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-26 03:45:12,210 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-08-26 03:45:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:12,260 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-08-26 03:45:12,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 03:45:12,261 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-26 03:45:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:12,261 INFO L225 Difference]: With dead ends: 54 [2021-08-26 03:45:12,261 INFO L226 Difference]: Without dead ends: 43 [2021-08-26 03:45:12,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-26 03:45:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-26 03:45:12,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-26 03:45:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-08-26 03:45:12,264 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 40 [2021-08-26 03:45:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:12,264 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-08-26 03:45:12,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-08-26 03:45:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-08-26 03:45:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-26 03:45:12,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:12,264 INFO L512 BasicCegarLoop]: trace histogram [18, 15, 3, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:12,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-26 03:45:12,465 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,SelfDestructingSolverStorable14 [2021-08-26 03:45:12,465 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash 172515501, now seen corresponding path program 12 times [2021-08-26 03:45:12,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:12,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869022503] [2021-08-26 03:45:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:12,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 03:45:12,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:12,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869022503] [2021-08-26 03:45:12,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869022503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:12,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225121409] [2021-08-26 03:45:12,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:45:12,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:12,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:12,645 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) [2021-08-26 03:45:12,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 03:45:12,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-26 03:45:12,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:12,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 03:45:12,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 105 proven. 9 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-08-26 03:45:12,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225121409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:12,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:12,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2021-08-26 03:45:12,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659846217] [2021-08-26 03:45:12,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-26 03:45:12,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:12,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-26 03:45:12,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-26 03:45:12,973 INFO L87 Difference]: Start difference. First operand 43 states and 46 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) [2021-08-26 03:45:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:13,030 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-08-26 03:45:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 03:45:13,031 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 42 [2021-08-26 03:45:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:13,031 INFO L225 Difference]: With dead ends: 59 [2021-08-26 03:45:13,031 INFO L226 Difference]: Without dead ends: 48 [2021-08-26 03:45:13,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-26 03:45:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-26 03:45:13,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-08-26 03:45:13,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 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) [2021-08-26 03:45:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-08-26 03:45:13,034 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2021-08-26 03:45:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:13,034 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-08-26 03:45:13,034 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) [2021-08-26 03:45:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-08-26 03:45:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 03:45:13,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:13,035 INFO L512 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:13,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-26 03:45:13,248 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,SelfDestructingSolverStorable15 [2021-08-26 03:45:13,249 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 13 times [2021-08-26 03:45:13,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:13,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953043593] [2021-08-26 03:45:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:13,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:45:13,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:13,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953043593] [2021-08-26 03:45:13,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953043593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:13,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116702078] [2021-08-26 03:45:13,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:45:13,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:13,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:13,441 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) [2021-08-26 03:45:13,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 03:45:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:13,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 03:45:13,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:45:13,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116702078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:13,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:13,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-26 03:45:13,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320305946] [2021-08-26 03:45:13,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 03:45:13,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:13,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 03:45:13,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-26 03:45:13,712 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-08-26 03:45:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:13,756 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-08-26 03:45:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-26 03:45:13,757 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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 46 [2021-08-26 03:45:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:13,757 INFO L225 Difference]: With dead ends: 62 [2021-08-26 03:45:13,757 INFO L226 Difference]: Without dead ends: 49 [2021-08-26 03:45:13,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-26 03:45:13,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-26 03:45:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-08-26 03:45:13,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-08-26 03:45:13,760 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 46 [2021-08-26 03:45:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:13,760 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-08-26 03:45:13,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-08-26 03:45:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-08-26 03:45:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-26 03:45:13,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:13,761 INFO L512 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:13,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:13,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:13,977 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:13,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 14 times [2021-08-26 03:45:13,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:13,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531296918] [2021-08-26 03:45:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:13,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:45:14,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:14,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531296918] [2021-08-26 03:45:14,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531296918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:14,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000441903] [2021-08-26 03:45:14,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:45:14,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:14,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:14,163 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) [2021-08-26 03:45:14,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 03:45:14,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:45:14,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:14,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 03:45:14,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:45:14,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000441903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:14,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:14,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-26 03:45:14,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664012027] [2021-08-26 03:45:14,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 03:45:14,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:14,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 03:45:14,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:45:14,517 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:14,570 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-08-26 03:45:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 03:45:14,570 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-26 03:45:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:14,571 INFO L225 Difference]: With dead ends: 64 [2021-08-26 03:45:14,571 INFO L226 Difference]: Without dead ends: 51 [2021-08-26 03:45:14,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:45:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-26 03:45:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-08-26 03:45:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 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) [2021-08-26 03:45:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-08-26 03:45:14,574 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 48 [2021-08-26 03:45:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:14,575 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-08-26 03:45:14,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-08-26 03:45:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-26 03:45:14,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:14,575 INFO L512 BasicCegarLoop]: trace histogram [22, 18, 4, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:14,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:14,785 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,SelfDestructingSolverStorable17 [2021-08-26 03:45:14,785 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:14,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:14,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1185460165, now seen corresponding path program 15 times [2021-08-26 03:45:14,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:14,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800028627] [2021-08-26 03:45:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:14,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 133 proven. 342 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:45:15,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:15,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800028627] [2021-08-26 03:45:15,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800028627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:15,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942793187] [2021-08-26 03:45:15,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:45:15,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:15,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:15,018 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) [2021-08-26 03:45:15,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 03:45:15,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-26 03:45:15,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:15,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 03:45:15,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 162 proven. 16 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-08-26 03:45:15,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942793187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:15,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:15,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7] total 26 [2021-08-26 03:45:15,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127494941] [2021-08-26 03:45:15,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-26 03:45:15,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:15,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-26 03:45:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-26 03:45:15,401 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 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) [2021-08-26 03:45:15,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:15,495 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-08-26 03:45:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-26 03:45:15,495 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 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 50 [2021-08-26 03:45:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:15,496 INFO L225 Difference]: With dead ends: 69 [2021-08-26 03:45:15,496 INFO L226 Difference]: Without dead ends: 56 [2021-08-26 03:45:15,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-26 03:45:15,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-26 03:45:15,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-08-26 03:45:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-08-26 03:45:15,499 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 50 [2021-08-26 03:45:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:15,499 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-08-26 03:45:15,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 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) [2021-08-26 03:45:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-08-26 03:45:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-26 03:45:15,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:15,500 INFO L512 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:15,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:15,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:15,721 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 16 times [2021-08-26 03:45:15,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:15,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224144796] [2021-08-26 03:45:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:15,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:45:15,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:15,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224144796] [2021-08-26 03:45:15,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224144796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:15,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886825834] [2021-08-26 03:45:15,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:45:15,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:15,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:15,941 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) [2021-08-26 03:45:15,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 03:45:16,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:45:16,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:16,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 03:45:16,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:45:16,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886825834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:16,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:16,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-26 03:45:16,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769360329] [2021-08-26 03:45:16,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 03:45:16,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:16,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 03:45:16,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-08-26 03:45:16,320 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-08-26 03:45:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:16,374 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2021-08-26 03:45:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 03:45:16,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 54 [2021-08-26 03:45:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:16,375 INFO L225 Difference]: With dead ends: 72 [2021-08-26 03:45:16,375 INFO L226 Difference]: Without dead ends: 57 [2021-08-26 03:45:16,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-08-26 03:45:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-26 03:45:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-26 03:45:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-08-26 03:45:16,378 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2021-08-26 03:45:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:16,378 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-08-26 03:45:16,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-08-26 03:45:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-08-26 03:45:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-26 03:45:16,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:16,379 INFO L512 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:16,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:16,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:16,598 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:16,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 17 times [2021-08-26 03:45:16,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:16,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879788886] [2021-08-26 03:45:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:16,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:45:16,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:16,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879788886] [2021-08-26 03:45:16,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879788886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:16,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503969959] [2021-08-26 03:45:16,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:45:16,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:16,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:16,821 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) [2021-08-26 03:45:16,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 03:45:17,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-08-26 03:45:17,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 03:45:17,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:45:17,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503969959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:17,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:17,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-08-26 03:45:17,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614163565] [2021-08-26 03:45:17,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-26 03:45:17,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-26 03:45:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-08-26 03:45:17,232 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:17,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:17,294 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-08-26 03:45:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 03:45:17,295 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-26 03:45:17,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:17,295 INFO L225 Difference]: With dead ends: 74 [2021-08-26 03:45:17,295 INFO L226 Difference]: Without dead ends: 59 [2021-08-26 03:45:17,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-08-26 03:45:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-26 03:45:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-26 03:45:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-08-26 03:45:17,302 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 56 [2021-08-26 03:45:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:17,302 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-08-26 03:45:17,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-08-26 03:45:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-26 03:45:17,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:17,303 INFO L512 BasicCegarLoop]: trace histogram [26, 21, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:17,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:17,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:17,513 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:17,513 INFO L82 PathProgramCache]: Analyzing trace with hash -575792311, now seen corresponding path program 18 times [2021-08-26 03:45:17,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:17,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656603396] [2021-08-26 03:45:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:17,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 198 proven. 462 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:45:17,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:17,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656603396] [2021-08-26 03:45:17,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656603396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:17,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679196323] [2021-08-26 03:45:17,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:45:17,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:17,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:17,758 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) [2021-08-26 03:45:17,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 03:45:18,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-08-26 03:45:18,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 03:45:18,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 231 proven. 25 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-08-26 03:45:18,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679196323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:18,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:18,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2021-08-26 03:45:18,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693903554] [2021-08-26 03:45:18,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-26 03:45:18,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-26 03:45:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-26 03:45:18,240 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 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) [2021-08-26 03:45:18,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:18,328 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2021-08-26 03:45:18,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-26 03:45:18,330 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 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 58 [2021-08-26 03:45:18,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:18,331 INFO L225 Difference]: With dead ends: 79 [2021-08-26 03:45:18,331 INFO L226 Difference]: Without dead ends: 64 [2021-08-26 03:45:18,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 307.0ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-26 03:45:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-26 03:45:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-08-26 03:45:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 62 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) [2021-08-26 03:45:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-08-26 03:45:18,334 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 58 [2021-08-26 03:45:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:18,334 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-08-26 03:45:18,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 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) [2021-08-26 03:45:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-08-26 03:45:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-26 03:45:18,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:18,335 INFO L512 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:18,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:18,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:18,552 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:18,553 INFO L82 PathProgramCache]: Analyzing trace with hash -429571503, now seen corresponding path program 19 times [2021-08-26 03:45:18,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:18,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496450785] [2021-08-26 03:45:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:18,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-26 03:45:18,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:18,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496450785] [2021-08-26 03:45:18,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496450785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:18,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343650561] [2021-08-26 03:45:18,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:45:18,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:18,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:18,806 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) [2021-08-26 03:45:18,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 03:45:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:19,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 03:45:19,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-26 03:45:19,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343650561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:19,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:19,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-08-26 03:45:19,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820421605] [2021-08-26 03:45:19,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-26 03:45:19,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:19,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-26 03:45:19,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-26 03:45:19,229 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:19,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:19,281 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-08-26 03:45:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-26 03:45:19,281 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-26 03:45:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:19,281 INFO L225 Difference]: With dead ends: 82 [2021-08-26 03:45:19,281 INFO L226 Difference]: Without dead ends: 65 [2021-08-26 03:45:19,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-26 03:45:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-26 03:45:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-08-26 03:45:19,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 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) [2021-08-26 03:45:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-08-26 03:45:19,284 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 62 [2021-08-26 03:45:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:19,284 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-08-26 03:45:19,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-08-26 03:45:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-26 03:45:19,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:19,285 INFO L512 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:19,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-26 03:45:19,485 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,SelfDestructingSolverStorable22 [2021-08-26 03:45:19,486 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:19,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1139183732, now seen corresponding path program 20 times [2021-08-26 03:45:19,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:19,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132769128] [2021-08-26 03:45:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:19,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-26 03:45:19,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:19,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132769128] [2021-08-26 03:45:19,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132769128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:19,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695185250] [2021-08-26 03:45:19,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:45:19,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:19,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:19,785 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) [2021-08-26 03:45:19,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 03:45:20,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:45:20,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:20,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 03:45:20,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-26 03:45:20,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695185250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:20,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:20,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-26 03:45:20,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188717406] [2021-08-26 03:45:20,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 03:45:20,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:20,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 03:45:20,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-08-26 03:45:20,288 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) [2021-08-26 03:45:20,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:20,342 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-08-26 03:45:20,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-26 03:45:20,342 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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 64 [2021-08-26 03:45:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:20,342 INFO L225 Difference]: With dead ends: 84 [2021-08-26 03:45:20,343 INFO L226 Difference]: Without dead ends: 67 [2021-08-26 03:45:20,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-08-26 03:45:20,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-26 03:45:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-08-26 03:45:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-08-26 03:45:20,345 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 64 [2021-08-26 03:45:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:20,345 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-08-26 03:45:20,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) [2021-08-26 03:45:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-08-26 03:45:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-26 03:45:20,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:20,346 INFO L512 BasicCegarLoop]: trace histogram [30, 24, 6, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:20,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:20,561 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,SelfDestructingSolverStorable23 [2021-08-26 03:45:20,562 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:20,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:20,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1179443671, now seen corresponding path program 21 times [2021-08-26 03:45:20,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:20,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82339688] [2021-08-26 03:45:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:20,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 275 proven. 600 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-26 03:45:20,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:20,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82339688] [2021-08-26 03:45:20,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82339688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:20,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697440231] [2021-08-26 03:45:20,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:45:20,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:20,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:20,855 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) [2021-08-26 03:45:20,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 03:45:21,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-08-26 03:45:21,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:21,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 03:45:21,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 312 proven. 36 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-08-26 03:45:21,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697440231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:21,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:21,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2021-08-26 03:45:21,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302854658] [2021-08-26 03:45:21,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-26 03:45:21,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-26 03:45:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 03:45:21,520 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2021-08-26 03:45:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:21,651 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2021-08-26 03:45:21,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-26 03:45:21,651 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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 66 [2021-08-26 03:45:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:21,653 INFO L225 Difference]: With dead ends: 89 [2021-08-26 03:45:21,653 INFO L226 Difference]: Without dead ends: 72 [2021-08-26 03:45:21,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 03:45:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-26 03:45:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-08-26 03:45:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-08-26 03:45:21,659 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 66 [2021-08-26 03:45:21,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:21,659 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-08-26 03:45:21,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2021-08-26 03:45:21,659 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-08-26 03:45:21,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-26 03:45:21,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:21,660 INFO L512 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:21,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:21,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:21,865 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:21,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1006564769, now seen corresponding path program 22 times [2021-08-26 03:45:21,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:21,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270695356] [2021-08-26 03:45:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:21,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-26 03:45:22,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:22,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270695356] [2021-08-26 03:45:22,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270695356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:22,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826750778] [2021-08-26 03:45:22,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:45:22,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:22,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:22,194 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) [2021-08-26 03:45:22,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 03:45:22,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:45:22,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:22,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-26 03:45:22,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-26 03:45:22,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826750778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:22,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:22,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-08-26 03:45:22,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809214692] [2021-08-26 03:45:22,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-26 03:45:22,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-26 03:45:22,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-08-26 03:45:22,710 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:22,776 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2021-08-26 03:45:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-26 03:45:22,776 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-26 03:45:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:22,777 INFO L225 Difference]: With dead ends: 92 [2021-08-26 03:45:22,777 INFO L226 Difference]: Without dead ends: 73 [2021-08-26 03:45:22,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-08-26 03:45:22,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-26 03:45:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-08-26 03:45:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2021-08-26 03:45:22,779 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 70 [2021-08-26 03:45:22,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:22,779 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2021-08-26 03:45:22,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2021-08-26 03:45:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-26 03:45:22,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:22,780 INFO L512 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:22,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-26 03:45:22,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:22,996 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:22,996 INFO L82 PathProgramCache]: Analyzing trace with hash 800032130, now seen corresponding path program 23 times [2021-08-26 03:45:22,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:22,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566762463] [2021-08-26 03:45:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:22,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-26 03:45:23,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:23,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566762463] [2021-08-26 03:45:23,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566762463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:23,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384916979] [2021-08-26 03:45:23,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:45:23,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:23,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:23,330 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) [2021-08-26 03:45:23,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 03:45:23,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-08-26 03:45:23,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-26 03:45:23,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-26 03:45:23,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384916979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:23,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:23,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-08-26 03:45:23,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313591909] [2021-08-26 03:45:23,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-26 03:45:23,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:23,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-26 03:45:23,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-26 03:45:23,908 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 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) [2021-08-26 03:45:23,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:23,966 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-08-26 03:45:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-26 03:45:23,966 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-26 03:45:23,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:23,966 INFO L225 Difference]: With dead ends: 94 [2021-08-26 03:45:23,966 INFO L226 Difference]: Without dead ends: 75 [2021-08-26 03:45:23,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-26 03:45:23,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-26 03:45:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-08-26 03:45:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 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) [2021-08-26 03:45:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-08-26 03:45:23,968 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 72 [2021-08-26 03:45:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:23,968 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-08-26 03:45:23,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 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) [2021-08-26 03:45:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-08-26 03:45:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-26 03:45:23,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:23,969 INFO L512 BasicCegarLoop]: trace histogram [34, 27, 7, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:23,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:24,182 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,SelfDestructingSolverStorable26 [2021-08-26 03:45:24,182 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1772864485, now seen corresponding path program 24 times [2021-08-26 03:45:24,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:24,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977791966] [2021-08-26 03:45:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:24,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 364 proven. 756 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-26 03:45:24,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:24,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977791966] [2021-08-26 03:45:24,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977791966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:24,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84664395] [2021-08-26 03:45:24,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:45:24,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:24,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:24,553 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) [2021-08-26 03:45:24,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 03:45:24,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-08-26 03:45:24,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:24,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 03:45:24,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 405 proven. 49 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-08-26 03:45:25,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84664395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:25,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:25,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10] total 38 [2021-08-26 03:45:25,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251415456] [2021-08-26 03:45:25,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-26 03:45:25,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:25,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-26 03:45:25,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 03:45:25,288 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:25,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:25,404 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2021-08-26 03:45:25,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-26 03:45:25,404 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-08-26 03:45:25,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:25,404 INFO L225 Difference]: With dead ends: 99 [2021-08-26 03:45:25,405 INFO L226 Difference]: Without dead ends: 80 [2021-08-26 03:45:25,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 03:45:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-26 03:45:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-08-26 03:45:25,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-08-26 03:45:25,407 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 74 [2021-08-26 03:45:25,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:25,407 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-08-26 03:45:25,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:25,407 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-08-26 03:45:25,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-26 03:45:25,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:25,407 INFO L512 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:25,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-26 03:45:25,607 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,SelfDestructingSolverStorable27 [2021-08-26 03:45:25,608 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:25,608 INFO L82 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 25 times [2021-08-26 03:45:25,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:25,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668170995] [2021-08-26 03:45:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:25,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-08-26 03:45:26,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:26,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668170995] [2021-08-26 03:45:26,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668170995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:26,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760233529] [2021-08-26 03:45:26,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:45:26,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:26,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:26,002 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) [2021-08-26 03:45:26,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 03:45:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:26,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 03:45:26,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-08-26 03:45:26,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760233529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:26,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:26,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-08-26 03:45:26,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302190801] [2021-08-26 03:45:26,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-26 03:45:26,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:26,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-26 03:45:26,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-08-26 03:45:26,643 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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) [2021-08-26 03:45:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:26,723 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2021-08-26 03:45:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-26 03:45:26,723 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-08-26 03:45:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:26,724 INFO L225 Difference]: With dead ends: 102 [2021-08-26 03:45:26,724 INFO L226 Difference]: Without dead ends: 81 [2021-08-26 03:45:26,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 337.0ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-08-26 03:45:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-26 03:45:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-08-26 03:45:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-08-26 03:45:26,726 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 78 [2021-08-26 03:45:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:26,727 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-08-26 03:45:26,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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) [2021-08-26 03:45:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-08-26 03:45:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-26 03:45:26,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:26,727 INFO L512 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:26,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:26,940 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,SelfDestructingSolverStorable28 [2021-08-26 03:45:26,941 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:26,941 INFO L82 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 26 times [2021-08-26 03:45:26,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:26,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125974128] [2021-08-26 03:45:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:26,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-08-26 03:45:27,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:27,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125974128] [2021-08-26 03:45:27,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125974128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:27,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078308095] [2021-08-26 03:45:27,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:45:27,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:27,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:27,334 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) [2021-08-26 03:45:27,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-26 03:45:27,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:45:27,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:27,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 03:45:27,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-08-26 03:45:27,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078308095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:27,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:27,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-08-26 03:45:27,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733432645] [2021-08-26 03:45:27,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-26 03:45:27,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:27,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-26 03:45:27,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 03:45:27,958 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 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) [2021-08-26 03:45:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:28,026 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2021-08-26 03:45:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-26 03:45:28,026 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 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 80 [2021-08-26 03:45:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:28,027 INFO L225 Difference]: With dead ends: 104 [2021-08-26 03:45:28,027 INFO L226 Difference]: Without dead ends: 83 [2021-08-26 03:45:28,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 336.1ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 03:45:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-26 03:45:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-08-26 03:45:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 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) [2021-08-26 03:45:28,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-08-26 03:45:28,029 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 80 [2021-08-26 03:45:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:28,030 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-08-26 03:45:28,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 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) [2021-08-26 03:45:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-08-26 03:45:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-26 03:45:28,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:28,030 INFO L512 BasicCegarLoop]: trace histogram [38, 30, 8, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:28,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:28,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:28,245 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:28,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1740300659, now seen corresponding path program 27 times [2021-08-26 03:45:28,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:28,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688666118] [2021-08-26 03:45:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:28,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-08-26 03:45:28,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:28,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688666118] [2021-08-26 03:45:28,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688666118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:28,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215615337] [2021-08-26 03:45:28,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:45:28,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:28,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:28,668 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) [2021-08-26 03:45:28,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-26 03:45:29,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-08-26 03:45:29,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:29,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 03:45:29,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 510 proven. 64 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-08-26 03:45:29,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215615337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:29,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:29,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 11] total 42 [2021-08-26 03:45:29,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251404774] [2021-08-26 03:45:29,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-26 03:45:29,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:29,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-26 03:45:29,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 03:45:29,547 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 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) [2021-08-26 03:45:29,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:29,688 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2021-08-26 03:45:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-26 03:45:29,689 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 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 82 [2021-08-26 03:45:29,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:29,689 INFO L225 Difference]: With dead ends: 109 [2021-08-26 03:45:29,689 INFO L226 Difference]: Without dead ends: 88 [2021-08-26 03:45:29,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 598.6ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 03:45:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-26 03:45:29,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-08-26 03:45:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 86 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-08-26 03:45:29,692 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 82 [2021-08-26 03:45:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:29,692 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-08-26 03:45:29,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 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) [2021-08-26 03:45:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-08-26 03:45:29,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-26 03:45:29,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:29,692 INFO L512 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:29,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-26 03:45:29,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:29,897 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:29,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:29,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 28 times [2021-08-26 03:45:29,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:29,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449970641] [2021-08-26 03:45:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:29,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-08-26 03:45:30,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:30,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449970641] [2021-08-26 03:45:30,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449970641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:30,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961751091] [2021-08-26 03:45:30,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:45:30,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:30,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:30,346 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) [2021-08-26 03:45:30,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-26 03:45:30,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:45:30,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:30,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-26 03:45:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-08-26 03:45:31,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961751091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:31,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:31,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-08-26 03:45:31,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57378865] [2021-08-26 03:45:31,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-26 03:45:31,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:31,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-26 03:45:31,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 03:45:31,058 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-08-26 03:45:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:31,121 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-08-26 03:45:31,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-26 03:45:31,121 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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 86 [2021-08-26 03:45:31,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:31,122 INFO L225 Difference]: With dead ends: 112 [2021-08-26 03:45:31,122 INFO L226 Difference]: Without dead ends: 89 [2021-08-26 03:45:31,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 03:45:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-26 03:45:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-08-26 03:45:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 88 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:31,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2021-08-26 03:45:31,124 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 86 [2021-08-26 03:45:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:31,125 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2021-08-26 03:45:31,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-08-26 03:45:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2021-08-26 03:45:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-26 03:45:31,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:31,125 INFO L512 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:31,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:31,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:31,326 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 29 times [2021-08-26 03:45:31,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:31,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963229009] [2021-08-26 03:45:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:31,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-08-26 03:45:31,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:31,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963229009] [2021-08-26 03:45:31,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963229009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:31,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677918596] [2021-08-26 03:45:31,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:45:31,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:31,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:31,795 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) [2021-08-26 03:45:31,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-26 03:45:32,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-08-26 03:45:32,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:32,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-26 03:45:32,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-08-26 03:45:32,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677918596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:32,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:32,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-08-26 03:45:32,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814572405] [2021-08-26 03:45:32,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-26 03:45:32,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:32,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-26 03:45:32,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 03:45:32,550 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 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) [2021-08-26 03:45:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:32,614 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2021-08-26 03:45:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-26 03:45:32,614 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-08-26 03:45:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:32,615 INFO L225 Difference]: With dead ends: 114 [2021-08-26 03:45:32,615 INFO L226 Difference]: Without dead ends: 91 [2021-08-26 03:45:32,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 03:45:32,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-26 03:45:32,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-08-26 03:45:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-08-26 03:45:32,617 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 88 [2021-08-26 03:45:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:32,618 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-08-26 03:45:32,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 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) [2021-08-26 03:45:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-08-26 03:45:32,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-26 03:45:32,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:32,618 INFO L512 BasicCegarLoop]: trace histogram [42, 33, 9, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:32,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-26 03:45:32,825 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,SelfDestructingSolverStorable32 [2021-08-26 03:45:32,825 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:32,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:32,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1948099967, now seen corresponding path program 30 times [2021-08-26 03:45:32,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:32,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894015234] [2021-08-26 03:45:32,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:32,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 578 proven. 1122 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-08-26 03:45:33,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:33,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894015234] [2021-08-26 03:45:33,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894015234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:33,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355813932] [2021-08-26 03:45:33,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:45:33,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:33,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:33,310 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) [2021-08-26 03:45:33,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-26 03:45:33,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-08-26 03:45:33,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:33,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 03:45:33,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 627 proven. 81 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-08-26 03:45:34,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355813932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:34,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:34,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 12] total 46 [2021-08-26 03:45:34,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264496906] [2021-08-26 03:45:34,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-26 03:45:34,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:34,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-26 03:45:34,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-08-26 03:45:34,362 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2021-08-26 03:45:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:34,513 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2021-08-26 03:45:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-26 03:45:34,513 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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 90 [2021-08-26 03:45:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:34,514 INFO L225 Difference]: With dead ends: 119 [2021-08-26 03:45:34,514 INFO L226 Difference]: Without dead ends: 96 [2021-08-26 03:45:34,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 708.8ms TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-08-26 03:45:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-26 03:45:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-08-26 03:45:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 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) [2021-08-26 03:45:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2021-08-26 03:45:34,517 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 90 [2021-08-26 03:45:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:34,517 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2021-08-26 03:45:34,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2021-08-26 03:45:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2021-08-26 03:45:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-26 03:45:34,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:34,518 INFO L512 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:34,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:34,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:34,725 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:34,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1852458889, now seen corresponding path program 31 times [2021-08-26 03:45:34,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:34,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581499044] [2021-08-26 03:45:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:34,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-08-26 03:45:35,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:35,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581499044] [2021-08-26 03:45:35,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581499044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:35,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471914883] [2021-08-26 03:45:35,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:45:35,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:35,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:35,239 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) [2021-08-26 03:45:35,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-26 03:45:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:35,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 03:45:35,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-08-26 03:45:36,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471914883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:36,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:36,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-08-26 03:45:36,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421578337] [2021-08-26 03:45:36,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-26 03:45:36,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:36,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-26 03:45:36,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 03:45:36,096 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 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) [2021-08-26 03:45:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:36,172 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2021-08-26 03:45:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-26 03:45:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 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) Word has length 94 [2021-08-26 03:45:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:36,173 INFO L225 Difference]: With dead ends: 122 [2021-08-26 03:45:36,173 INFO L226 Difference]: Without dead ends: 97 [2021-08-26 03:45:36,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 450.1ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 03:45:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-26 03:45:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-08-26 03:45:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1145833333333333) internal successors, (107), 96 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) [2021-08-26 03:45:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2021-08-26 03:45:36,178 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 94 [2021-08-26 03:45:36,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:36,178 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2021-08-26 03:45:36,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 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) [2021-08-26 03:45:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2021-08-26 03:45:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-26 03:45:36,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:36,179 INFO L512 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:36,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-26 03:45:36,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:36,379 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:36,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2008172972, now seen corresponding path program 32 times [2021-08-26 03:45:36,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:36,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585380234] [2021-08-26 03:45:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:36,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-08-26 03:45:36,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:36,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585380234] [2021-08-26 03:45:36,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585380234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:36,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382618948] [2021-08-26 03:45:36,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:45:36,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:36,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:36,946 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) [2021-08-26 03:45:36,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-26 03:45:37,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:45:37,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:37,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 03:45:37,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-08-26 03:45:37,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382618948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:37,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:37,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-08-26 03:45:37,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744144554] [2021-08-26 03:45:37,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-26 03:45:37,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:37,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-26 03:45:37,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 03:45:37,824 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:37,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:37,895 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-08-26 03:45:37,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-26 03:45:37,896 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-26 03:45:37,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:37,896 INFO L225 Difference]: With dead ends: 124 [2021-08-26 03:45:37,896 INFO L226 Difference]: Without dead ends: 99 [2021-08-26 03:45:37,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 500.7ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 03:45:37,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-26 03:45:37,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-08-26 03:45:37,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1122448979591837) internal successors, (109), 98 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-08-26 03:45:37,900 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 96 [2021-08-26 03:45:37,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:37,900 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-08-26 03:45:37,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-08-26 03:45:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-08-26 03:45:37,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:37,901 INFO L512 BasicCegarLoop]: trace histogram [46, 36, 10, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:37,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:38,117 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,SelfDestructingSolverStorable35 [2021-08-26 03:45:38,117 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1325551375, now seen corresponding path program 33 times [2021-08-26 03:45:38,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:38,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345238667] [2021-08-26 03:45:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:38,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 703 proven. 1332 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-08-26 03:45:38,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:38,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345238667] [2021-08-26 03:45:38,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345238667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:38,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787845818] [2021-08-26 03:45:38,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:45:38,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:38,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:38,716 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) [2021-08-26 03:45:38,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-26 03:45:39,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-08-26 03:45:39,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:39,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 03:45:39,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 756 proven. 100 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2021-08-26 03:45:39,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787845818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:39,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:39,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2021-08-26 03:45:39,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148461272] [2021-08-26 03:45:39,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-26 03:45:39,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:39,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-26 03:45:39,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-08-26 03:45:39,928 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 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) [2021-08-26 03:45:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:40,095 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-08-26 03:45:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-26 03:45:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 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) Word has length 98 [2021-08-26 03:45:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:40,098 INFO L225 Difference]: With dead ends: 129 [2021-08-26 03:45:40,098 INFO L226 Difference]: Without dead ends: 104 [2021-08-26 03:45:40,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 865.5ms TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-08-26 03:45:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-26 03:45:40,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-08-26 03:45:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 102 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:40,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2021-08-26 03:45:40,101 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 98 [2021-08-26 03:45:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:40,101 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2021-08-26 03:45:40,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 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) [2021-08-26 03:45:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2021-08-26 03:45:40,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-26 03:45:40,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:40,102 INFO L512 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:40,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:40,309 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,SelfDestructingSolverStorable36 [2021-08-26 03:45:40,309 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1778401897, now seen corresponding path program 34 times [2021-08-26 03:45:40,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:40,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163410197] [2021-08-26 03:45:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:40,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-26 03:45:40,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:40,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163410197] [2021-08-26 03:45:40,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163410197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:40,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918331755] [2021-08-26 03:45:40,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:45:40,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:40,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:40,902 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) [2021-08-26 03:45:40,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-26 03:45:41,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:45:41,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:41,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-26 03:45:41,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-26 03:45:41,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918331755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:41,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:41,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-08-26 03:45:41,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26302446] [2021-08-26 03:45:41,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-26 03:45:41,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:41,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-26 03:45:41,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-08-26 03:45:41,844 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:41,919 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2021-08-26 03:45:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-26 03:45:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-08-26 03:45:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:41,920 INFO L225 Difference]: With dead ends: 132 [2021-08-26 03:45:41,920 INFO L226 Difference]: Without dead ends: 105 [2021-08-26 03:45:41,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 525.0ms TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-08-26 03:45:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-26 03:45:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-08-26 03:45:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1153846153846154) internal successors, (116), 104 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) [2021-08-26 03:45:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-08-26 03:45:41,923 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 102 [2021-08-26 03:45:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:41,923 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-08-26 03:45:41,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-08-26 03:45:41,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-08-26 03:45:41,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:41,924 INFO L512 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:41,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-26 03:45:42,130 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,SelfDestructingSolverStorable37 [2021-08-26 03:45:42,131 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:42,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1518277446, now seen corresponding path program 35 times [2021-08-26 03:45:42,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:42,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268450320] [2021-08-26 03:45:42,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:42,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-26 03:45:42,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:42,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268450320] [2021-08-26 03:45:42,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268450320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:42,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276515814] [2021-08-26 03:45:42,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:45:42,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:42,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:42,752 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) [2021-08-26 03:45:42,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-26 03:45:43,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2021-08-26 03:45:43,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:43,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 03:45:43,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-26 03:45:43,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276515814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:43,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:43,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-08-26 03:45:43,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930082586] [2021-08-26 03:45:43,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-26 03:45:43,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-26 03:45:43,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 03:45:43,746 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:43,828 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2021-08-26 03:45:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-26 03:45:43,828 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-08-26 03:45:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:43,829 INFO L225 Difference]: With dead ends: 134 [2021-08-26 03:45:43,829 INFO L226 Difference]: Without dead ends: 107 [2021-08-26 03:45:43,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 03:45:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-26 03:45:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-08-26 03:45:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 106 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) [2021-08-26 03:45:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2021-08-26 03:45:43,832 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 104 [2021-08-26 03:45:43,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:43,832 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2021-08-26 03:45:43,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:43,832 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2021-08-26 03:45:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-26 03:45:43,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:43,833 INFO L512 BasicCegarLoop]: trace histogram [50, 39, 11, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:43,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-26 03:45:44,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-26 03:45:44,037 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:44,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:44,037 INFO L82 PathProgramCache]: Analyzing trace with hash -646783203, now seen corresponding path program 36 times [2021-08-26 03:45:44,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:44,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325417410] [2021-08-26 03:45:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:44,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 840 proven. 1560 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-26 03:45:44,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:44,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325417410] [2021-08-26 03:45:44,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325417410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:44,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313918938] [2021-08-26 03:45:44,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:45:44,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:44,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:44,705 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) [2021-08-26 03:45:44,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-26 03:45:45,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-08-26 03:45:45,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:45,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 03:45:45,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 897 proven. 121 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-08-26 03:45:46,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313918938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:46,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:46,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2021-08-26 03:45:46,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130278985] [2021-08-26 03:45:46,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-26 03:45:46,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:46,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-26 03:45:46,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 03:45:46,131 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 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) [2021-08-26 03:45:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:46,297 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2021-08-26 03:45:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-26 03:45:46,297 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 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 106 [2021-08-26 03:45:46,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:46,298 INFO L225 Difference]: With dead ends: 139 [2021-08-26 03:45:46,298 INFO L226 Difference]: Without dead ends: 112 [2021-08-26 03:45:46,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 976.0ms TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 03:45:46,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-26 03:45:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-08-26 03:45:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 110 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) [2021-08-26 03:45:46,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2021-08-26 03:45:46,301 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 106 [2021-08-26 03:45:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:46,301 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2021-08-26 03:45:46,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 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) [2021-08-26 03:45:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2021-08-26 03:45:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-26 03:45:46,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:46,301 INFO L512 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:46,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-26 03:45:46,502 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,SelfDestructingSolverStorable39 [2021-08-26 03:45:46,502 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:46,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:46,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 37 times [2021-08-26 03:45:46,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:46,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659876405] [2021-08-26 03:45:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:46,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-08-26 03:45:47,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:47,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659876405] [2021-08-26 03:45:47,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659876405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:47,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087014211] [2021-08-26 03:45:47,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:45:47,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:47,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:47,166 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) [2021-08-26 03:45:47,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-26 03:45:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:47,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-26 03:45:47,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-08-26 03:45:48,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087014211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:48,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:48,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-08-26 03:45:48,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178828809] [2021-08-26 03:45:48,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-26 03:45:48,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:48,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-26 03:45:48,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-08-26 03:45:48,243 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:48,324 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2021-08-26 03:45:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-26 03:45:48,325 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-26 03:45:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:48,325 INFO L225 Difference]: With dead ends: 142 [2021-08-26 03:45:48,325 INFO L226 Difference]: Without dead ends: 113 [2021-08-26 03:45:48,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 586.0ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-08-26 03:45:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-26 03:45:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-08-26 03:45:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1160714285714286) internal successors, (125), 112 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) [2021-08-26 03:45:48,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2021-08-26 03:45:48,328 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 110 [2021-08-26 03:45:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:48,328 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2021-08-26 03:45:48,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2021-08-26 03:45:48,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-26 03:45:48,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:48,329 INFO L512 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:48,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:48,544 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,SelfDestructingSolverStorable40 [2021-08-26 03:45:48,545 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:48,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1252870984, now seen corresponding path program 38 times [2021-08-26 03:45:48,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:48,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394942127] [2021-08-26 03:45:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:48,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-08-26 03:45:49,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:49,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394942127] [2021-08-26 03:45:49,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394942127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:49,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132882414] [2021-08-26 03:45:49,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:45:49,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:49,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:49,253 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) [2021-08-26 03:45:49,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-26 03:45:50,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:45:50,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:50,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-26 03:45:50,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-08-26 03:45:50,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132882414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:50,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:50,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-08-26 03:45:50,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026231673] [2021-08-26 03:45:50,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-26 03:45:50,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:50,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-26 03:45:50,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-08-26 03:45:50,351 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 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) [2021-08-26 03:45:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:50,439 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2021-08-26 03:45:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-26 03:45:50,439 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 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 112 [2021-08-26 03:45:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:50,440 INFO L225 Difference]: With dead ends: 144 [2021-08-26 03:45:50,440 INFO L226 Difference]: Without dead ends: 115 [2021-08-26 03:45:50,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-08-26 03:45:50,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-26 03:45:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-08-26 03:45:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 114 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-08-26 03:45:50,443 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 112 [2021-08-26 03:45:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:50,443 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-08-26 03:45:50,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 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) [2021-08-26 03:45:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-08-26 03:45:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-08-26 03:45:50,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:50,444 INFO L512 BasicCegarLoop]: trace histogram [54, 42, 12, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:50,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:50,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-26 03:45:50,656 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:50,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:50,656 INFO L82 PathProgramCache]: Analyzing trace with hash 84159147, now seen corresponding path program 39 times [2021-08-26 03:45:50,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:50,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442516589] [2021-08-26 03:45:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:50,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 989 proven. 1806 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-08-26 03:45:51,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:51,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442516589] [2021-08-26 03:45:51,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442516589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:51,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783628760] [2021-08-26 03:45:51,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:45:51,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:51,414 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) [2021-08-26 03:45:51,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-26 03:45:52,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-08-26 03:45:52,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:52,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 03:45:52,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1050 proven. 144 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-08-26 03:45:52,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783628760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:52,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:52,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 15] total 58 [2021-08-26 03:45:52,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035174683] [2021-08-26 03:45:52,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-26 03:45:52,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:52,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-26 03:45:52,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-08-26 03:45:52,967 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 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) [2021-08-26 03:45:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:53,124 INFO L93 Difference]: Finished difference Result 149 states and 177 transitions. [2021-08-26 03:45:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-26 03:45:53,124 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 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 114 [2021-08-26 03:45:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:53,125 INFO L225 Difference]: With dead ends: 149 [2021-08-26 03:45:53,125 INFO L226 Difference]: Without dead ends: 120 [2021-08-26 03:45:53,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1130.9ms TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-08-26 03:45:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-26 03:45:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-08-26 03:45:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.11864406779661) internal successors, (132), 118 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2021-08-26 03:45:53,128 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 114 [2021-08-26 03:45:53,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:53,128 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2021-08-26 03:45:53,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 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) [2021-08-26 03:45:53,128 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2021-08-26 03:45:53,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-26 03:45:53,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:53,129 INFO L512 BasicCegarLoop]: trace histogram [56, 43, 13, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:53,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-26 03:45:53,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-26 03:45:53,333 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:53,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1023214541, now seen corresponding path program 40 times [2021-08-26 03:45:53,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:53,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621598950] [2021-08-26 03:45:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:53,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-08-26 03:45:54,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:54,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621598950] [2021-08-26 03:45:54,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621598950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:54,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464969556] [2021-08-26 03:45:54,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:45:54,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:54,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:54,143 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:45:54,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-26 03:45:55,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:45:55,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-26 03:45:55,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-08-26 03:45:55,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464969556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:55,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:55,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-08-26 03:45:55,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991925856] [2021-08-26 03:45:55,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-26 03:45:55,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:55,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-26 03:45:55,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-08-26 03:45:55,322 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 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) [2021-08-26 03:45:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:55,413 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2021-08-26 03:45:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-26 03:45:55,413 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 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 118 [2021-08-26 03:45:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:55,413 INFO L225 Difference]: With dead ends: 152 [2021-08-26 03:45:55,413 INFO L226 Difference]: Without dead ends: 121 [2021-08-26 03:45:55,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 720.2ms TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-08-26 03:45:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-26 03:45:55,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-08-26 03:45:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1166666666666667) internal successors, (134), 120 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2021-08-26 03:45:55,416 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 118 [2021-08-26 03:45:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:55,416 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2021-08-26 03:45:55,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 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) [2021-08-26 03:45:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2021-08-26 03:45:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-26 03:45:55,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:55,417 INFO L512 BasicCegarLoop]: trace histogram [57, 44, 13, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:55,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-26 03:45:55,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:55,618 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:55,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:55,618 INFO L82 PathProgramCache]: Analyzing trace with hash -411073194, now seen corresponding path program 41 times [2021-08-26 03:45:55,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:55,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474694396] [2021-08-26 03:45:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:55,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-08-26 03:45:56,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:56,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474694396] [2021-08-26 03:45:56,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474694396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:56,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739291515] [2021-08-26 03:45:56,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:45:56,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:56,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:56,424 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:45:56,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-26 03:45:57,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2021-08-26 03:45:57,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:57,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 03:45:57,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-08-26 03:45:57,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739291515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:57,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:57,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-08-26 03:45:57,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146841358] [2021-08-26 03:45:57,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-26 03:45:57,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:57,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-26 03:45:57,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 03:45:57,634 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 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) [2021-08-26 03:45:57,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:57,733 INFO L93 Difference]: Finished difference Result 154 states and 181 transitions. [2021-08-26 03:45:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-26 03:45:57,734 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-08-26 03:45:57,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:57,734 INFO L225 Difference]: With dead ends: 154 [2021-08-26 03:45:57,734 INFO L226 Difference]: Without dead ends: 123 [2021-08-26 03:45:57,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 730.8ms TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 03:45:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-26 03:45:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-08-26 03:45:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 122 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) [2021-08-26 03:45:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2021-08-26 03:45:57,737 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 120 [2021-08-26 03:45:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:57,738 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2021-08-26 03:45:57,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 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) [2021-08-26 03:45:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2021-08-26 03:45:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-08-26 03:45:57,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:57,738 INFO L512 BasicCegarLoop]: trace histogram [58, 45, 13, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:57,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-26 03:45:57,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:57,953 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:57,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:57,953 INFO L82 PathProgramCache]: Analyzing trace with hash -553758279, now seen corresponding path program 42 times [2021-08-26 03:45:57,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:57,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241477053] [2021-08-26 03:45:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:57,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1150 proven. 2070 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-08-26 03:45:58,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:58,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241477053] [2021-08-26 03:45:58,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241477053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:58,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4807674] [2021-08-26 03:45:58,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:45:58,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:58,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:58,781 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:45:58,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-26 03:45:59,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-08-26 03:45:59,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:59,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 03:45:59,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1215 proven. 169 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2021-08-26 03:46:00,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4807674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:00,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:00,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 16] total 62 [2021-08-26 03:46:00,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570987191] [2021-08-26 03:46:00,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-26 03:46:00,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:00,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-26 03:46:00,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-08-26 03:46:00,578 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 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) [2021-08-26 03:46:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:00,811 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2021-08-26 03:46:00,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-26 03:46:00,811 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 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 122 [2021-08-26 03:46:00,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:00,812 INFO L225 Difference]: With dead ends: 159 [2021-08-26 03:46:00,812 INFO L226 Difference]: Without dead ends: 128 [2021-08-26 03:46:00,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1272.4ms TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-08-26 03:46:00,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-26 03:46:00,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-08-26 03:46:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.119047619047619) internal successors, (141), 126 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2021-08-26 03:46:00,815 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 122 [2021-08-26 03:46:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:00,815 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2021-08-26 03:46:00,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 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) [2021-08-26 03:46:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2021-08-26 03:46:00,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-08-26 03:46:00,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:00,816 INFO L512 BasicCegarLoop]: trace histogram [60, 46, 14, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:00,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:01,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-26 03:46:01,036 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:01,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1685652673, now seen corresponding path program 43 times [2021-08-26 03:46:01,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:01,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482775621] [2021-08-26 03:46:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:01,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-08-26 03:46:01,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:01,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482775621] [2021-08-26 03:46:01,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482775621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:01,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738605465] [2021-08-26 03:46:01,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:46:01,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:01,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:01,959 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:01,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-26 03:46:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:02,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-26 03:46:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-08-26 03:46:03,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738605465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:03,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:03,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-08-26 03:46:03,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384363488] [2021-08-26 03:46:03,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-26 03:46:03,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:03,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-26 03:46:03,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-08-26 03:46:03,265 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 50 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) [2021-08-26 03:46:03,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:03,356 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2021-08-26 03:46:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-26 03:46:03,357 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 50 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 126 [2021-08-26 03:46:03,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:03,357 INFO L225 Difference]: With dead ends: 162 [2021-08-26 03:46:03,357 INFO L226 Difference]: Without dead ends: 129 [2021-08-26 03:46:03,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 814.3ms TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-08-26 03:46:03,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-26 03:46:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-08-26 03:46:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.1171875) internal successors, (143), 128 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2021-08-26 03:46:03,360 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 126 [2021-08-26 03:46:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:03,360 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2021-08-26 03:46:03,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 50 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) [2021-08-26 03:46:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2021-08-26 03:46:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-08-26 03:46:03,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:03,361 INFO L512 BasicCegarLoop]: trace histogram [61, 47, 14, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:03,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:03,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-26 03:46:03,570 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:03,570 INFO L82 PathProgramCache]: Analyzing trace with hash 834124516, now seen corresponding path program 44 times [2021-08-26 03:46:03,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:03,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637299347] [2021-08-26 03:46:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:03,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-08-26 03:46:04,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:04,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637299347] [2021-08-26 03:46:04,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637299347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:04,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552051230] [2021-08-26 03:46:04,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:46:04,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:04,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:04,423 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:04,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-26 03:46:05,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:46:05,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:05,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-26 03:46:05,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-08-26 03:46:05,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552051230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:05,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:05,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-08-26 03:46:05,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62387558] [2021-08-26 03:46:05,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-26 03:46:05,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:05,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-26 03:46:05,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-08-26 03:46:05,793 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 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) [2021-08-26 03:46:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:05,885 INFO L93 Difference]: Finished difference Result 164 states and 193 transitions. [2021-08-26 03:46:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-26 03:46:05,886 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 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) Word has length 128 [2021-08-26 03:46:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:05,886 INFO L225 Difference]: With dead ends: 164 [2021-08-26 03:46:05,886 INFO L226 Difference]: Without dead ends: 131 [2021-08-26 03:46:05,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 774.9ms TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-08-26 03:46:05,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-26 03:46:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-08-26 03:46:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1153846153846154) internal successors, (145), 130 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2021-08-26 03:46:05,889 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 128 [2021-08-26 03:46:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:05,889 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2021-08-26 03:46:05,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 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) [2021-08-26 03:46:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2021-08-26 03:46:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-26 03:46:05,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:05,890 INFO L512 BasicCegarLoop]: trace histogram [62, 48, 14, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:05,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:06,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-26 03:46:06,113 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:06,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:06,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1440648121, now seen corresponding path program 45 times [2021-08-26 03:46:06,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:06,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484384477] [2021-08-26 03:46:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:06,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1323 proven. 2352 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-08-26 03:46:07,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:07,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484384477] [2021-08-26 03:46:07,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484384477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:07,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760879291] [2021-08-26 03:46:07,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:46:07,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:07,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:07,030 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:07,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-26 03:46:08,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-08-26 03:46:08,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:08,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 03:46:08,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1392 proven. 196 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2021-08-26 03:46:08,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760879291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:08,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:08,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 17] total 66 [2021-08-26 03:46:08,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135659093] [2021-08-26 03:46:08,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-26 03:46:08,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:08,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-26 03:46:08,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-08-26 03:46:08,994 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:09,163 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2021-08-26 03:46:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-26 03:46:09,164 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-08-26 03:46:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:09,164 INFO L225 Difference]: With dead ends: 169 [2021-08-26 03:46:09,164 INFO L226 Difference]: Without dead ends: 136 [2021-08-26 03:46:09,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1410.8ms TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-08-26 03:46:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-26 03:46:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-08-26 03:46:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1194029850746268) internal successors, (150), 134 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:09,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2021-08-26 03:46:09,168 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 130 [2021-08-26 03:46:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:09,168 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2021-08-26 03:46:09,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2021-08-26 03:46:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-08-26 03:46:09,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:09,169 INFO L512 BasicCegarLoop]: trace histogram [64, 49, 15, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:09,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:09,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:09,384 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:09,384 INFO L82 PathProgramCache]: Analyzing trace with hash -83220273, now seen corresponding path program 46 times [2021-08-26 03:46:09,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:09,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563702699] [2021-08-26 03:46:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:09,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-08-26 03:46:10,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:10,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563702699] [2021-08-26 03:46:10,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563702699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:10,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399292207] [2021-08-26 03:46:10,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:46:10,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:10,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:10,337 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:10,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-26 03:46:11,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:46:11,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:11,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-26 03:46:11,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-08-26 03:46:11,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399292207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:11,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:11,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-08-26 03:46:11,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198817100] [2021-08-26 03:46:11,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-26 03:46:11,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-26 03:46:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-08-26 03:46:11,838 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 53 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) [2021-08-26 03:46:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:11,930 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2021-08-26 03:46:11,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-26 03:46:11,930 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 53 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) Word has length 134 [2021-08-26 03:46:11,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:11,931 INFO L225 Difference]: With dead ends: 172 [2021-08-26 03:46:11,931 INFO L226 Difference]: Without dead ends: 137 [2021-08-26 03:46:11,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 871.3ms TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-08-26 03:46:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-26 03:46:11,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-08-26 03:46:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 136 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) [2021-08-26 03:46:11,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2021-08-26 03:46:11,933 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 134 [2021-08-26 03:46:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:11,934 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2021-08-26 03:46:11,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 53 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) [2021-08-26 03:46:11,934 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2021-08-26 03:46:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-08-26 03:46:11,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:11,934 INFO L512 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:11,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-26 03:46:12,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-26 03:46:12,147 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:12,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1769075726, now seen corresponding path program 47 times [2021-08-26 03:46:12,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:12,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370439680] [2021-08-26 03:46:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:12,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:13,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:13,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370439680] [2021-08-26 03:46:13,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370439680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:13,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116127598] [2021-08-26 03:46:13,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:46:13,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:13,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:13,747 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:13,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-26 03:46:14,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-08-26 03:46:14,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:14,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 03:46:14,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 1024 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-08-26 03:46:16,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116127598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:16,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:16,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 35] total 85 [2021-08-26 03:46:16,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969496873] [2021-08-26 03:46:16,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-08-26 03:46:16,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:16,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-08-26 03:46:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-08-26 03:46:16,251 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand has 85 states, 85 states have (on average 2.235294117647059) internal successors, (190), 85 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) [2021-08-26 03:46:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:16,604 INFO L93 Difference]: Finished difference Result 178 states and 229 transitions. [2021-08-26 03:46:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-26 03:46:16,605 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.235294117647059) internal successors, (190), 85 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 136 [2021-08-26 03:46:16,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:16,606 INFO L225 Difference]: With dead ends: 178 [2021-08-26 03:46:16,606 INFO L226 Difference]: Without dead ends: 174 [2021-08-26 03:46:16,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2460.2ms TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-08-26 03:46:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-26 03:46:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-08-26 03:46:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.197674418604651) internal successors, (206), 172 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 206 transitions. [2021-08-26 03:46:16,609 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 206 transitions. Word has length 136 [2021-08-26 03:46:16,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:16,610 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 206 transitions. [2021-08-26 03:46:16,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.235294117647059) internal successors, (190), 85 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) [2021-08-26 03:46:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 206 transitions. [2021-08-26 03:46:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-08-26 03:46:16,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:16,613 INFO L512 BasicCegarLoop]: trace histogram [83, 50, 33, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:16,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:16,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:16,829 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:16,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:16,829 INFO L82 PathProgramCache]: Analyzing trace with hash 823112396, now seen corresponding path program 48 times [2021-08-26 03:46:16,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:16,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969677001] [2021-08-26 03:46:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:16,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:19,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:19,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969677001] [2021-08-26 03:46:19,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969677001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:19,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200592281] [2021-08-26 03:46:19,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:46:19,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:19,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:19,390 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:19,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-26 03:46:20,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2021-08-26 03:46:20,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:20,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-26 03:46:20,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3486 proven. 1681 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-08-26 03:46:21,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200592281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:21,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:21,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 44] total 94 [2021-08-26 03:46:21,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099692615] [2021-08-26 03:46:21,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-08-26 03:46:21,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:21,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-08-26 03:46:21,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-08-26 03:46:21,625 INFO L87 Difference]: Start difference. First operand 173 states and 206 transitions. Second operand has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 94 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:22,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:22,175 INFO L93 Difference]: Finished difference Result 196 states and 247 transitions. [2021-08-26 03:46:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-08-26 03:46:22,176 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 94 states have internal predecessors, (201), 0 states have call successors, (0), 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 172 [2021-08-26 03:46:22,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:22,177 INFO L225 Difference]: With dead ends: 196 [2021-08-26 03:46:22,177 INFO L226 Difference]: Without dead ends: 192 [2021-08-26 03:46:22,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2936.8ms TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-08-26 03:46:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-26 03:46:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-08-26 03:46:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.2263157894736842) internal successors, (233), 190 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:22,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 233 transitions. [2021-08-26 03:46:22,182 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 233 transitions. Word has length 172 [2021-08-26 03:46:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:22,182 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 233 transitions. [2021-08-26 03:46:22,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 94 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:22,183 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 233 transitions. [2021-08-26 03:46:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-08-26 03:46:22,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:22,184 INFO L512 BasicCegarLoop]: trace histogram [92, 50, 42, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:22,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:22,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-26 03:46:22,397 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1326856103, now seen corresponding path program 49 times [2021-08-26 03:46:22,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:22,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111470561] [2021-08-26 03:46:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:22,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:25,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:25,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111470561] [2021-08-26 03:46:25,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111470561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:25,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465508516] [2021-08-26 03:46:25,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:46:25,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:25,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:25,482 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:25,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-26 03:46:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:26,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-26 03:46:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:27,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465508516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:27,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:27,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-08-26 03:46:27,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837612885] [2021-08-26 03:46:27,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-08-26 03:46:27,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:27,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-08-26 03:46:27,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-08-26 03:46:27,285 INFO L87 Difference]: Start difference. First operand 191 states and 233 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 96 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:27,857 INFO L93 Difference]: Finished difference Result 198 states and 242 transitions. [2021-08-26 03:46:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-26 03:46:27,858 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 96 states have internal predecessors, (193), 0 states have call successors, (0), 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 190 [2021-08-26 03:46:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:27,859 INFO L225 Difference]: With dead ends: 198 [2021-08-26 03:46:27,859 INFO L226 Difference]: Without dead ends: 194 [2021-08-26 03:46:27,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2926.3ms TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-08-26 03:46:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-08-26 03:46:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-08-26 03:46:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.2291666666666667) internal successors, (236), 192 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 236 transitions. [2021-08-26 03:46:27,863 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 236 transitions. Word has length 190 [2021-08-26 03:46:27,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:27,863 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 236 transitions. [2021-08-26 03:46:27,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 96 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 236 transitions. [2021-08-26 03:46:27,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-08-26 03:46:27,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:27,864 INFO L512 BasicCegarLoop]: trace histogram [93, 50, 43, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:27,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:28,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-26 03:46:28,073 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:28,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:28,073 INFO L82 PathProgramCache]: Analyzing trace with hash 548761726, now seen corresponding path program 50 times [2021-08-26 03:46:28,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:28,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125958489] [2021-08-26 03:46:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:28,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:31,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:31,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125958489] [2021-08-26 03:46:31,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125958489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:31,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951798396] [2021-08-26 03:46:31,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:46:31,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:31,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:31,308 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:31,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-26 03:46:32,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:46:32,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:32,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 95 conjunts are in the unsatisfiable core [2021-08-26 03:46:32,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:33,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951798396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:33,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:33,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2021-08-26 03:46:33,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010718476] [2021-08-26 03:46:33,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-08-26 03:46:33,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:33,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-08-26 03:46:33,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-08-26 03:46:33,190 INFO L87 Difference]: Start difference. First operand 193 states and 236 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:33,770 INFO L93 Difference]: Finished difference Result 200 states and 245 transitions. [2021-08-26 03:46:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-26 03:46:33,771 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 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 192 [2021-08-26 03:46:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:33,771 INFO L225 Difference]: With dead ends: 200 [2021-08-26 03:46:33,771 INFO L226 Difference]: Without dead ends: 196 [2021-08-26 03:46:33,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3055.6ms TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-08-26 03:46:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-26 03:46:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-08-26 03:46:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.231958762886598) internal successors, (239), 194 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 239 transitions. [2021-08-26 03:46:33,775 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 239 transitions. Word has length 192 [2021-08-26 03:46:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:33,775 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 239 transitions. [2021-08-26 03:46:33,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 239 transitions. [2021-08-26 03:46:33,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-08-26 03:46:33,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:33,776 INFO L512 BasicCegarLoop]: trace histogram [94, 50, 44, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:33,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:33,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:33,985 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:33,985 INFO L82 PathProgramCache]: Analyzing trace with hash -868768925, now seen corresponding path program 51 times [2021-08-26 03:46:33,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:33,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777871157] [2021-08-26 03:46:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:33,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:37,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:37,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777871157] [2021-08-26 03:46:37,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777871157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:37,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46812655] [2021-08-26 03:46:37,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:46:37,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:37,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:37,329 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:37,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-26 03:46:38,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2021-08-26 03:46:38,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:38,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-26 03:46:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 4450 proven. 1936 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-08-26 03:46:39,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46812655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:39,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:39,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 47] total 97 [2021-08-26 03:46:39,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904861352] [2021-08-26 03:46:39,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-08-26 03:46:39,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:39,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-08-26 03:46:39,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-08-26 03:46:39,324 INFO L87 Difference]: Start difference. First operand 195 states and 239 transitions. Second operand has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:39,945 INFO L93 Difference]: Finished difference Result 202 states and 248 transitions. [2021-08-26 03:46:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-26 03:46:39,946 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 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 194 [2021-08-26 03:46:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:39,947 INFO L225 Difference]: With dead ends: 202 [2021-08-26 03:46:39,947 INFO L226 Difference]: Without dead ends: 198 [2021-08-26 03:46:39,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3201.0ms TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-08-26 03:46:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-26 03:46:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-08-26 03:46:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.2346938775510203) internal successors, (242), 196 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:39,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 242 transitions. [2021-08-26 03:46:39,951 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 242 transitions. Word has length 194 [2021-08-26 03:46:39,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:39,951 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 242 transitions. [2021-08-26 03:46:39,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 242 transitions. [2021-08-26 03:46:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-08-26 03:46:39,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:39,952 INFO L512 BasicCegarLoop]: trace histogram [95, 50, 45, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:39,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-26 03:46:40,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-26 03:46:40,157 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:40,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1611091704, now seen corresponding path program 52 times [2021-08-26 03:46:40,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:40,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217215917] [2021-08-26 03:46:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:40,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:43,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:43,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217215917] [2021-08-26 03:46:43,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217215917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:43,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781193012] [2021-08-26 03:46:43,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:46:43,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:43,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:43,453 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:43,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-26 03:46:44,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:46:44,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:44,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 97 conjunts are in the unsatisfiable core [2021-08-26 03:46:44,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:45,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781193012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:45,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:45,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2021-08-26 03:46:45,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816326161] [2021-08-26 03:46:45,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-08-26 03:46:45,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:45,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-08-26 03:46:45,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-08-26 03:46:45,498 INFO L87 Difference]: Start difference. First operand 197 states and 242 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:46,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:46,148 INFO L93 Difference]: Finished difference Result 204 states and 251 transitions. [2021-08-26 03:46:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-26 03:46:46,149 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 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 196 [2021-08-26 03:46:46,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:46,150 INFO L225 Difference]: With dead ends: 204 [2021-08-26 03:46:46,150 INFO L226 Difference]: Without dead ends: 200 [2021-08-26 03:46:46,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3128.0ms TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-08-26 03:46:46,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-08-26 03:46:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-08-26 03:46:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.2373737373737375) internal successors, (245), 198 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 245 transitions. [2021-08-26 03:46:46,153 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 245 transitions. Word has length 196 [2021-08-26 03:46:46,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:46,154 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 245 transitions. [2021-08-26 03:46:46,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 245 transitions. [2021-08-26 03:46:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-08-26 03:46:46,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:46,155 INFO L512 BasicCegarLoop]: trace histogram [96, 50, 46, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:46,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:46,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-26 03:46:46,378 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:46,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2018711187, now seen corresponding path program 53 times [2021-08-26 03:46:46,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:46,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137923688] [2021-08-26 03:46:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:46,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:49,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:49,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137923688] [2021-08-26 03:46:49,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137923688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:49,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671457066] [2021-08-26 03:46:49,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:46:49,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:49,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:49,738 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:49,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-26 03:46:51,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2021-08-26 03:46:51,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:51,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-26 03:46:51,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 4656 proven. 2304 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2021-08-26 03:46:52,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671457066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:52,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:52,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 51] total 101 [2021-08-26 03:46:52,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123654737] [2021-08-26 03:46:52,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-08-26 03:46:52,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:52,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-08-26 03:46:52,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-08-26 03:46:52,053 INFO L87 Difference]: Start difference. First operand 199 states and 245 transitions. Second operand has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 101 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:52,678 INFO L93 Difference]: Finished difference Result 210 states and 262 transitions. [2021-08-26 03:46:52,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-08-26 03:46:52,678 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 101 states have internal predecessors, (209), 0 states have call successors, (0), 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 198 [2021-08-26 03:46:52,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:52,679 INFO L225 Difference]: With dead ends: 210 [2021-08-26 03:46:52,679 INFO L226 Difference]: Without dead ends: 206 [2021-08-26 03:46:52,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3369.9ms TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-08-26 03:46:52,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-26 03:46:52,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-08-26 03:46:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.2450980392156863) internal successors, (254), 204 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) [2021-08-26 03:46:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 254 transitions. [2021-08-26 03:46:52,683 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 254 transitions. Word has length 198 [2021-08-26 03:46:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:52,683 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 254 transitions. [2021-08-26 03:46:52,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 101 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 254 transitions. [2021-08-26 03:46:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-08-26 03:46:52,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:52,684 INFO L512 BasicCegarLoop]: trace histogram [99, 50, 49, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:52,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:52,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:52,893 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:52,893 INFO L82 PathProgramCache]: Analyzing trace with hash -400837860, now seen corresponding path program 54 times [2021-08-26 03:46:52,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:52,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307133629] [2021-08-26 03:46:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:52,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:56,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:56,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307133629] [2021-08-26 03:46:56,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307133629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:56,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143655028] [2021-08-26 03:46:56,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:46:56,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:56,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:56,450 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:56,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-26 03:46:58,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 99 check-sat command(s) [2021-08-26 03:46:58,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-26 03:46:58,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 4950 proven. 2401 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-08-26 03:46:58,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143655028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:58,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:58,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 52] total 102 [2021-08-26 03:46:58,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528344448] [2021-08-26 03:46:58,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-08-26 03:46:58,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:58,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-08-26 03:46:58,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-08-26 03:46:58,697 INFO L87 Difference]: Start difference. First operand 205 states and 254 transitions. Second operand has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:59,406 INFO L93 Difference]: Finished difference Result 211 states and 261 transitions. [2021-08-26 03:46:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-26 03:46:59,406 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 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 204 [2021-08-26 03:46:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:59,407 INFO L225 Difference]: With dead ends: 211 [2021-08-26 03:46:59,407 INFO L226 Difference]: Without dead ends: 207 [2021-08-26 03:46:59,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3422.5ms TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-08-26 03:46:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-08-26 03:46:59,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-08-26 03:46:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.2475728155339805) internal successors, (257), 206 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2021-08-26 03:46:59,411 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 204 [2021-08-26 03:46:59,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:59,411 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2021-08-26 03:46:59,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:59,412 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2021-08-26 03:46:59,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-08-26 03:46:59,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:59,412 INFO L512 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:59,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:59,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:59,625 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:59,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:59,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1394062977, now seen corresponding path program 55 times [2021-08-26 03:46:59,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:59,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146626928] [2021-08-26 03:46:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:59,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-08-26 03:47:01,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:01,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146626928] [2021-08-26 03:47:01,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146626928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:01,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729584048] [2021-08-26 03:47:01,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:47:01,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:01,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:01,069 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:01,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-26 03:47:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:02,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 105 conjunts are in the unsatisfiable core [2021-08-26 03:47:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:47:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-08-26 03:47:04,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729584048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:04,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:47:04,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-08-26 03:47:04,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751624565] [2021-08-26 03:47:04,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-26 03:47:04,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:04,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-26 03:47:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2021-08-26 03:47:04,143 INFO L87 Difference]: Start difference. First operand 207 states and 257 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:05,251 INFO L93 Difference]: Finished difference Result 2862 states and 4237 transitions. [2021-08-26 03:47:05,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-26 03:47:05,251 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-08-26 03:47:05,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:05,258 INFO L225 Difference]: With dead ends: 2862 [2021-08-26 03:47:05,258 INFO L226 Difference]: Without dead ends: 2858 [2021-08-26 03:47:05,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1298.9ms TimeCoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2021-08-26 03:47:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-08-26 03:47:05,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 209. [2021-08-26 03:47:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.25) internal successors, (260), 208 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:05,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 260 transitions. [2021-08-26 03:47:05,285 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 260 transitions. Word has length 206 [2021-08-26 03:47:05,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:05,285 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 260 transitions. [2021-08-26 03:47:05,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 260 transitions. [2021-08-26 03:47:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-08-26 03:47:05,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:47:05,287 INFO L512 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1] [2021-08-26 03:47:05,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-26 03:47:05,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:05,489 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:47:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:47:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash -283085658, now seen corresponding path program 56 times [2021-08-26 03:47:05,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:47:05,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841983547] [2021-08-26 03:47:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:47:05,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:47:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-08-26 03:47:06,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:06,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841983547] [2021-08-26 03:47:06,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841983547] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:47:06,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:47:06,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-08-26 03:47:06,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713495805] [2021-08-26 03:47:06,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-26 03:47:06,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:06,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-26 03:47:06,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-08-26 03:47:06,541 INFO L87 Difference]: Start difference. First operand 209 states and 260 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:06,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:06,793 INFO L93 Difference]: Finished difference Result 308 states and 408 transitions. [2021-08-26 03:47:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-26 03:47:06,794 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-08-26 03:47:06,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:06,794 INFO L225 Difference]: With dead ends: 308 [2021-08-26 03:47:06,794 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 03:47:06,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 916.1ms TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-08-26 03:47:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 03:47:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 03:47:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 03:47:06,795 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 208 [2021-08-26 03:47:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:06,795 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 03:47:06,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:06,795 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 03:47:06,796 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 03:47:06,798 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:47:06,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-08-26 03:47:06,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 03:47:06,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:47:06,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:47:07,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:47:08,737 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 03:47:08,738 INFO L857 garLoopResultBuilder]: For program point L27-2(lines 27 34) no Hoare annotation was computed. [2021-08-26 03:47:08,738 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-08-26 03:47:08,738 INFO L860 garLoopResultBuilder]: At program point L36(lines 24 37) the Hoare annotation is: true [2021-08-26 03:47:08,738 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 03:47:08,738 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 03:47:08,738 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 03:47:08,738 INFO L857 garLoopResultBuilder]: For program point L28(lines 28 33) no Hoare annotation was computed. [2021-08-26 03:47:08,738 INFO L853 garLoopResultBuilder]: At program point L28-2(lines 27 34) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~y~0 64) (<= 64 ULTIMATE.start_main_~y~0) (<= 64 ULTIMATE.start_main_~x~0) (< ULTIMATE.start_main_~x~0 65)) (and (<= 76 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 76) (<= ULTIMATE.start_main_~x~0 76) (<= 76 ULTIMATE.start_main_~x~0)) (and (<= 58 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 58) (<= 58 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 58)) (and (<= 61 ULTIMATE.start_main_~x~0) (<= 61 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 61) (<= ULTIMATE.start_main_~y~0 61)) (and (<= ULTIMATE.start_main_~y~0 89) (<= 89 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 89) (<= 89 ULTIMATE.start_main_~y~0)) (and (<= 79 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 79) (<= ULTIMATE.start_main_~x~0 79) (<= 79 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 90) (<= 90 ULTIMATE.start_main_~x~0) (<= 90 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 90)) (and (<= 52 ULTIMATE.start_main_~y~0) (<= 52 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 52) (< ULTIMATE.start_main_~x~0 53)) (and (<= 83 ULTIMATE.start_main_~y~0) (<= 83 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 83) (<= ULTIMATE.start_main_~y~0 83)) (and (<= ULTIMATE.start_main_~y~0 62) (<= ULTIMATE.start_main_~x~0 62) (<= 62 ULTIMATE.start_main_~y~0) (<= 62 ULTIMATE.start_main_~x~0)) (and (<= 81 ULTIMATE.start_main_~y~0) (<= 81 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 81) (<= ULTIMATE.start_main_~y~0 81)) (and (<= ULTIMATE.start_main_~x~0 82) (<= ULTIMATE.start_main_~y~0 82) (<= 82 ULTIMATE.start_main_~x~0) (<= 82 ULTIMATE.start_main_~y~0)) (and (<= 56 ULTIMATE.start_main_~y~0) (<= 56 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 56) (< ULTIMATE.start_main_~x~0 57)) (and (<= 54 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 54) (<= 54 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 54)) (and (<= ULTIMATE.start_main_~x~0 91) (<= 91 ULTIMATE.start_main_~x~0) (<= 91 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 91)) (and (<= 71 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 71) (<= ULTIMATE.start_main_~x~0 71) (<= 71 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 92) (<= 92 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 92) (<= 92 ULTIMATE.start_main_~x~0)) (and (<= 50 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 51) (<= ULTIMATE.start_main_~y~0 50)) (and (<= 96 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 96) (<= ULTIMATE.start_main_~y~0 96) (<= 96 ULTIMATE.start_main_~y~0)) (and (<= 97 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 97) (<= ULTIMATE.start_main_~y~0 97) (<= 97 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 85) (<= 85 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 85) (<= 85 ULTIMATE.start_main_~x~0)) (and (<= 57 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 57) (<= 57 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 58)) (and (<= 86 ULTIMATE.start_main_~y~0) (<= 86 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 86) (<= ULTIMATE.start_main_~x~0 86)) (and (<= 94 ULTIMATE.start_main_~y~0) (<= 94 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 94) (<= ULTIMATE.start_main_~y~0 94)) (and (<= 74 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 74) (<= 74 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 74)) (and (<= ULTIMATE.start_main_~y~0 53) (<= 53 ULTIMATE.start_main_~x~0) (<= 53 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 54)) (and (<= ULTIMATE.start_main_~y~0 87) (<= ULTIMATE.start_main_~x~0 87) (<= 87 ULTIMATE.start_main_~x~0) (<= 87 ULTIMATE.start_main_~y~0)) (and (<= 60 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 60) (<= ULTIMATE.start_main_~y~0 60) (<= 60 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 65) (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~y~0) (<= 65 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 98) (<= 98 ULTIMATE.start_main_~y~0) (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (<= 100 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 100) (< 99 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 88) (<= 88 ULTIMATE.start_main_~x~0) (<= 88 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 88)) (and (<= 59 ULTIMATE.start_main_~y~0) (<= 59 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 59) (<= ULTIMATE.start_main_~x~0 59)) (and (<= ULTIMATE.start_main_~y~0 55) (<= 55 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 56) (<= 55 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 70) (<= 70 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 70) (<= 70 ULTIMATE.start_main_~y~0)) (and (<= 77 ULTIMATE.start_main_~y~0) (<= 77 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 77) (<= ULTIMATE.start_main_~y~0 77)) (and (<= 73 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 73) (<= 73 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 73)) (and (<= ULTIMATE.start_main_~x~0 99) (<= 99 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 99) (<= 99 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 67) (<= 67 ULTIMATE.start_main_~x~0) (<= 67 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 67)) (and (< ULTIMATE.start_main_~x~0 64) (<= 63 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 63) (<= 63 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 93) (<= 93 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 93) (<= 93 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 84) (<= ULTIMATE.start_main_~x~0 84) (<= 84 ULTIMATE.start_main_~x~0) (<= 84 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 75) (<= 75 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 75) (<= 75 ULTIMATE.start_main_~y~0)) (and (<= 68 ULTIMATE.start_main_~y~0) (<= 68 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 68) (<= ULTIMATE.start_main_~x~0 68)) (and (<= 51 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 52) (<= 51 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 51)) (and (<= 69 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 69) (<= 69 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 69)) (and (<= ULTIMATE.start_main_~x~0 80) (<= ULTIMATE.start_main_~y~0 80) (<= 80 ULTIMATE.start_main_~y~0) (<= 80 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 95) (<= 95 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 95) (<= 95 ULTIMATE.start_main_~y~0)) (and (<= 78 ULTIMATE.start_main_~y~0) (<= 78 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 78) (<= ULTIMATE.start_main_~x~0 78)) (and (<= ULTIMATE.start_main_~y~0 72) (<= 72 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 72) (<= 72 ULTIMATE.start_main_~x~0)) (and (<= 66 ULTIMATE.start_main_~y~0) (<= 66 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 66) (<= ULTIMATE.start_main_~x~0 66))) [2021-08-26 03:47:08,739 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-26 03:47:08,739 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-08-26 03:47:08,739 INFO L860 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-08-26 03:47:08,741 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:47:08,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:47:08 BoogieIcfgContainer [2021-08-26 03:47:08,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:47:08,792 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:47:08,792 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:47:08,792 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:47:08,792 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:45:05" (3/4) ... [2021-08-26 03:47:08,794 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 03:47:08,800 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-26 03:47:08,801 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 03:47:08,801 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:47:08,802 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:47:08,823 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:47:08,823 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:47:08,825 INFO L168 Benchmark]: Toolchain (without parser) took 123451.94 ms. Allocated memory was 54.5 MB in the beginning and 906.0 MB in the end (delta: 851.4 MB). Free memory was 37.5 MB in the beginning and 519.1 MB in the end (delta: -481.6 MB). Peak memory consumption was 369.3 MB. Max. memory is 16.1 GB. [2021-08-26 03:47:08,825 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 44.0 MB. Free memory was 26.3 MB in the beginning and 26.3 MB in the end (delta: 43.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:47:08,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.65 ms. Allocated memory is still 54.5 MB. Free memory was 37.4 MB in the beginning and 38.8 MB in the end (delta: -1.5 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:47:08,826 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.05 ms. Allocated memory is still 54.5 MB. Free memory was 38.8 MB in the beginning and 37.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:47:08,826 INFO L168 Benchmark]: Boogie Preprocessor took 17.24 ms. Allocated memory is still 54.5 MB. Free memory was 37.5 MB in the beginning and 36.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:47:08,826 INFO L168 Benchmark]: RCFGBuilder took 252.22 ms. Allocated memory is still 54.5 MB. Free memory was 36.4 MB in the beginning and 37.5 MB in the end (delta: -1.0 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:47:08,827 INFO L168 Benchmark]: TraceAbstraction took 122934.06 ms. Allocated memory was 54.5 MB in the beginning and 906.0 MB in the end (delta: 851.4 MB). Free memory was 37.1 MB in the beginning and 522.2 MB in the end (delta: -485.2 MB). Peak memory consumption was 657.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:47:08,827 INFO L168 Benchmark]: Witness Printer took 31.40 ms. Allocated memory is still 906.0 MB. Free memory was 522.2 MB in the beginning and 519.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:47:08,828 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 44.0 MB. Free memory was 26.3 MB in the beginning and 26.3 MB in the end (delta: 43.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 190.65 ms. Allocated memory is still 54.5 MB. Free memory was 37.4 MB in the beginning and 38.8 MB in the end (delta: -1.5 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 21.05 ms. Allocated memory is still 54.5 MB. Free memory was 38.8 MB in the beginning and 37.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.24 ms. Allocated memory is still 54.5 MB. Free memory was 37.5 MB in the beginning and 36.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 252.22 ms. Allocated memory is still 54.5 MB. Free memory was 36.4 MB in the beginning and 37.5 MB in the end (delta: -1.0 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 122934.06 ms. Allocated memory was 54.5 MB in the beginning and 906.0 MB in the end (delta: 851.4 MB). Free memory was 37.1 MB in the beginning and 522.2 MB in the end (delta: -485.2 MB). Peak memory consumption was 657.4 MB. Max. memory is 16.1 GB. * Witness Printer took 31.40 ms. Allocated memory is still 906.0 MB. Free memory was 522.2 MB in the beginning and 519.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 122834.7ms, OverallIterations: 60, TraceHistogramMax: 101, EmptinessCheckTime: 34.9ms, AutomataDifference: 9958.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1938.8ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 501 SDtfs, 1345 SDslu, 6489 SDs, 0 SdLazy, 8165 SolverSat, 4412 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5032.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7207 GetRequests, 4930 SyntacticMatches, 7 SemanticMatches, 2270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2307 ImplicationChecksByTransitivity, 46199.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=209occurred in iteration=59, InterpolantAutomatonStates: 2352, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 191.2ms AutomataMinimizationTime, 60 MinimizatonAttempts, 2671 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 660 HoareAnnotationTreeSize, 3 FomulaSimplifications, 15405 FormulaSimplificationTreeSizeReduction, 581.0ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 420 FormulaSimplificationTreeSizeReductionInter, 1350.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 422.4ms SsaConstructionTime, 2207.5ms SatisfiabilityAnalysisTime, 63442.7ms InterpolantComputationTime, 10346 NumberOfCodeBlocks, 9986 NumberOfCodeBlocksAsserted, 1129 NumberOfCheckSat, 10230 ConstructedInterpolants, 0 QuantifiedInterpolants, 26595 SizeOfPredicates, 2 NumberOfNonLiveVariables, 12202 ConjunctsInSsa, 1649 ConjunctsInUnsatCore, 116 InterpolantComputations, 4 PerfectInterpolantSequences, 107648/293403 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 64 && 64 <= y) && 64 <= x) && x < 65) || (((76 <= y && y <= 76) && x <= 76) && 76 <= x)) || (((58 <= x && y <= 58) && 58 <= y) && x <= 58)) || (((61 <= x && 61 <= y) && x <= 61) && y <= 61)) || (((y <= 89 && 89 <= x) && x <= 89) && 89 <= y)) || (((79 <= y && y <= 79) && x <= 79) && 79 <= x)) || (((y <= 90 && 90 <= x) && 90 <= y) && x <= 90)) || (((52 <= y && 52 <= x) && y <= 52) && x < 53)) || (((83 <= y && 83 <= x) && x <= 83) && y <= 83)) || (((y <= 62 && x <= 62) && 62 <= y) && 62 <= x)) || (((81 <= y && 81 <= x) && x <= 81) && y <= 81)) || (((x <= 82 && y <= 82) && 82 <= x) && 82 <= y)) || (((56 <= y && 56 <= x) && y <= 56) && x < 57)) || (((54 <= x && y <= 54) && 54 <= y) && x <= 54)) || (((x <= 91 && 91 <= x) && 91 <= y) && y <= 91)) || (((71 <= x && y <= 71) && x <= 71) && 71 <= y)) || (((y <= 92 && 92 <= y) && x <= 92) && 92 <= x)) || ((50 <= y && x < 51) && y <= 50)) || (((96 <= x && x <= 96) && y <= 96) && 96 <= y)) || (((97 <= y && x <= 97) && y <= 97) && 97 <= x)) || (((x <= 85 && 85 <= y) && y <= 85) && 85 <= x)) || (((57 <= x && y <= 57) && 57 <= y) && x < 58)) || (((86 <= y && 86 <= x) && y <= 86) && x <= 86)) || (((94 <= y && 94 <= x) && x <= 94) && y <= 94)) || (((74 <= y && y <= 74) && 74 <= x) && x <= 74)) || (((y <= 53 && 53 <= x) && 53 <= y) && x < 54)) || (((y <= 87 && x <= 87) && 87 <= x) && 87 <= y)) || (((60 <= y && x <= 60) && y <= 60) && 60 <= x)) || (((y <= 65 && x <= 65) && 65 <= y) && 65 <= x)) || (((y <= 98 && 98 <= y) && 98 <= x) && x <= 98)) || ((100 <= x && y <= 100) && 99 < y)) || (((y <= 88 && 88 <= x) && 88 <= y) && x <= 88)) || (((59 <= y && 59 <= x) && y <= 59) && x <= 59)) || (((y <= 55 && 55 <= y) && x < 56) && 55 <= x)) || (((y <= 70 && 70 <= x) && x <= 70) && 70 <= y)) || (((77 <= y && 77 <= x) && x <= 77) && y <= 77)) || (((73 <= x && x <= 73) && 73 <= y) && y <= 73)) || (((x <= 99 && 99 <= x) && y <= 99) && 99 <= y)) || (((y <= 67 && 67 <= x) && 67 <= y) && x <= 67)) || (((x < 64 && 63 <= y) && y <= 63) && 63 <= x)) || (((x <= 93 && 93 <= y) && y <= 93) && 93 <= x)) || (((y <= 84 && x <= 84) && 84 <= x) && 84 <= y)) || (((y <= 75 && 75 <= x) && x <= 75) && 75 <= y)) || (((68 <= y && 68 <= x) && y <= 68) && x <= 68)) || (((51 <= y && x < 52) && 51 <= x) && y <= 51)) || (((69 <= y && x <= 69) && 69 <= x) && y <= 69)) || (((x <= 80 && y <= 80) && 80 <= y) && 80 <= x)) || (((y <= 95 && 95 <= x) && x <= 95) && 95 <= y)) || (((78 <= y && 78 <= x) && y <= 78) && x <= 78)) || (((y <= 72 && 72 <= y) && x <= 72) && 72 <= x)) || (((66 <= y && 66 <= x) && y <= 66) && x <= 66) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-26 03:47:08,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...