./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/eca-rers2012/Problem15_label28.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e1b64adb5298d170b0a0065804aa34285565fef303a8d1c9e978e6f35837be1e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:14:04,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:14:04,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:14:04,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:14:04,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:14:04,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:14:04,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:14:04,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:14:04,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:14:04,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:14:04,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:14:04,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:14:04,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:14:04,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:14:04,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:14:04,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:14:04,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:14:04,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:14:04,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:14:04,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:14:04,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:14:04,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:14:04,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:14:04,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:14:04,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:14:04,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:14:04,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:14:04,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:14:04,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:14:04,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:14:04,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:14:04,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:14:04,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:14:04,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:14:04,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:14:04,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:14:04,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:14:04,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:14:04,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:14:04,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:14:04,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:14:04,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:14:04,453 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:14:04,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:14:04,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:14:04,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:14:04,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:14:04,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:14:04,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:14:04,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:14:04,456 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:14:04,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:14:04,457 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:14:04,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:14:04,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:14:04,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:14:04,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:14:04,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:14:04,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:14:04,459 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:14:04,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:14:04,459 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:14:04,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:14:04,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:14:04,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:14:04,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:14:04,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:14:04,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:14:04,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:14:04,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:14:04,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:14:04,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:14:04,462 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:14:04,462 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:14:04,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:14:04,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:14:04,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1b64adb5298d170b0a0065804aa34285565fef303a8d1c9e978e6f35837be1e [2021-12-21 11:14:04,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:14:04,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:14:04,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:14:04,683 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:14:04,685 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:14:04,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label28.c [2021-12-21 11:14:04,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd43962be/082c851826ec488e859512a070ff3ebf/FLAG7bcc228db [2021-12-21 11:14:05,300 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:14:05,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label28.c [2021-12-21 11:14:05,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd43962be/082c851826ec488e859512a070ff3ebf/FLAG7bcc228db [2021-12-21 11:14:05,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd43962be/082c851826ec488e859512a070ff3ebf [2021-12-21 11:14:05,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:14:05,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:14:05,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:14:05,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:14:05,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:14:05,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:14:05" (1/1) ... [2021-12-21 11:14:05,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9c515e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:05, skipping insertion in model container [2021-12-21 11:14:05,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:14:05" (1/1) ... [2021-12-21 11:14:05,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:14:05,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:14:05,803 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label28.c[4049,4062] [2021-12-21 11:14:06,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:14:06,223 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:14:06,251 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label28.c[4049,4062] [2021-12-21 11:14:06,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:14:06,438 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:14:06,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:06 WrapperNode [2021-12-21 11:14:06,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:14:06,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:14:06,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:14:06,441 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:14:06,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:06" (1/1) ... [2021-12-21 11:14:06,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:06" (1/1) ... [2021-12-21 11:14:06,696 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-21 11:14:06,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:14:06,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:14:06,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:14:06,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:14:06,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:06" (1/1) ... [2021-12-21 11:14:06,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:06" (1/1) ... [2021-12-21 11:14:06,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:06" (1/1) ... [2021-12-21 11:14:06,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:06" (1/1) ... [2021-12-21 11:14:06,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:06" (1/1) ... [2021-12-21 11:14:06,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:06" (1/1) ... [2021-12-21 11:14:06,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:06" (1/1) ... [2021-12-21 11:14:06,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:14:06,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:14:06,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:14:06,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:14:06,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:06" (1/1) ... [2021-12-21 11:14:06,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:14:06,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:06,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:14:06,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:14:06,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:14:06,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:14:06,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:14:06,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:14:06,996 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:14:06,997 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:14:09,266 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:14:09,277 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:14:09,277 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:14:09,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:14:09 BoogieIcfgContainer [2021-12-21 11:14:09,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:14:09,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:14:09,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:14:09,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:14:09,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:14:05" (1/3) ... [2021-12-21 11:14:09,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30af97ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:14:09, skipping insertion in model container [2021-12-21 11:14:09,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:06" (2/3) ... [2021-12-21 11:14:09,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30af97ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:14:09, skipping insertion in model container [2021-12-21 11:14:09,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:14:09" (3/3) ... [2021-12-21 11:14:09,286 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label28.c [2021-12-21 11:14:09,293 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:14:09,294 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:14:09,345 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:14:09,351 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:14:09,351 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:14:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 11:14:09,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:09,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:09,390 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:09,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1317301102, now seen corresponding path program 1 times [2021-12-21 11:14:09,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:09,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652269230] [2021-12-21 11:14:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:09,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:14:09,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:09,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652269230] [2021-12-21 11:14:09,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652269230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:09,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:09,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:14:09,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150590718] [2021-12-21 11:14:09,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:09,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:09,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:09,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:09,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:09,646 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:11,412 INFO L93 Difference]: Finished difference Result 1155 states and 2106 transitions. [2021-12-21 11:14:11,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:11,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-21 11:14:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:11,437 INFO L225 Difference]: With dead ends: 1155 [2021-12-21 11:14:11,437 INFO L226 Difference]: Without dead ends: 667 [2021-12-21 11:14:11,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:11,446 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 312 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:11,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 371 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 11:14:11,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-12-21 11:14:11,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 665. [2021-12-21 11:14:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.4789156626506024) internal successors, (982), 664 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 982 transitions. [2021-12-21 11:14:11,514 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 982 transitions. Word has length 32 [2021-12-21 11:14:11,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:11,514 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 982 transitions. [2021-12-21 11:14:11,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 982 transitions. [2021-12-21 11:14:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-21 11:14:11,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:11,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:11,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:14:11,518 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:11,519 INFO L85 PathProgramCache]: Analyzing trace with hash 251864749, now seen corresponding path program 1 times [2021-12-21 11:14:11,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:11,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806294627] [2021-12-21 11:14:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:11,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:14:11,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:11,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806294627] [2021-12-21 11:14:11,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806294627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:11,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:11,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:14:11,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983731786] [2021-12-21 11:14:11,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:11,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:11,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:11,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:11,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:11,652 INFO L87 Difference]: Start difference. First operand 665 states and 982 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:13,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:13,464 INFO L93 Difference]: Finished difference Result 1955 states and 2894 transitions. [2021-12-21 11:14:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:13,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 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 107 [2021-12-21 11:14:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:13,470 INFO L225 Difference]: With dead ends: 1955 [2021-12-21 11:14:13,470 INFO L226 Difference]: Without dead ends: 1292 [2021-12-21 11:14:13,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:13,474 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 258 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:13,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 327 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 11:14:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-12-21 11:14:13,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1282. [2021-12-21 11:14:13,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.3989071038251366) internal successors, (1792), 1281 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1792 transitions. [2021-12-21 11:14:13,502 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1792 transitions. Word has length 107 [2021-12-21 11:14:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:13,503 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1792 transitions. [2021-12-21 11:14:13,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1792 transitions. [2021-12-21 11:14:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 11:14:13,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:13,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:13,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:14:13,507 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:13,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:13,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1575980701, now seen corresponding path program 1 times [2021-12-21 11:14:13,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:13,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880485605] [2021-12-21 11:14:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:13,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:14:13,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:13,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880485605] [2021-12-21 11:14:13,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880485605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:13,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:13,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:14:13,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390597663] [2021-12-21 11:14:13,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:13,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:13,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:13,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:13,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:13,591 INFO L87 Difference]: Start difference. First operand 1282 states and 1792 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:15,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:15,606 INFO L93 Difference]: Finished difference Result 3764 states and 5263 transitions. [2021-12-21 11:14:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:15,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 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 111 [2021-12-21 11:14:15,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:15,615 INFO L225 Difference]: With dead ends: 3764 [2021-12-21 11:14:15,616 INFO L226 Difference]: Without dead ends: 2484 [2021-12-21 11:14:15,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:15,618 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 236 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:15,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 366 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 11:14:15,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-12-21 11:14:15,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2182. [2021-12-21 11:14:15,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 1.2815222375057314) internal successors, (2795), 2181 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 2795 transitions. [2021-12-21 11:14:15,654 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 2795 transitions. Word has length 111 [2021-12-21 11:14:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:15,654 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 2795 transitions. [2021-12-21 11:14:15,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 2795 transitions. [2021-12-21 11:14:15,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-21 11:14:15,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:15,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:15,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:14:15,664 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:15,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:15,665 INFO L85 PathProgramCache]: Analyzing trace with hash -445236617, now seen corresponding path program 1 times [2021-12-21 11:14:15,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:15,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95227710] [2021-12-21 11:14:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:15,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 11:14:15,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:15,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95227710] [2021-12-21 11:14:15,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95227710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:15,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:15,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:14:15,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189976804] [2021-12-21 11:14:15,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:15,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:15,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:15,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:15,799 INFO L87 Difference]: Start difference. First operand 2182 states and 2795 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:17,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:17,126 INFO L93 Difference]: Finished difference Result 6166 states and 7961 transitions. [2021-12-21 11:14:17,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:17,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-12-21 11:14:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:17,140 INFO L225 Difference]: With dead ends: 6166 [2021-12-21 11:14:17,141 INFO L226 Difference]: Without dead ends: 3986 [2021-12-21 11:14:17,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:17,145 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:17,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:14:17,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-12-21 11:14:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3682. [2021-12-21 11:14:17,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 1.2200488997555012) internal successors, (4491), 3681 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4491 transitions. [2021-12-21 11:14:17,206 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4491 transitions. Word has length 202 [2021-12-21 11:14:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:17,207 INFO L470 AbstractCegarLoop]: Abstraction has 3682 states and 4491 transitions. [2021-12-21 11:14:17,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4491 transitions. [2021-12-21 11:14:17,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-12-21 11:14:17,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:17,211 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:17,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:14:17,212 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:17,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:17,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1158649091, now seen corresponding path program 1 times [2021-12-21 11:14:17,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:17,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709271062] [2021-12-21 11:14:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:17,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 11:14:17,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:17,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709271062] [2021-12-21 11:14:17,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709271062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:17,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:17,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:14:17,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641821536] [2021-12-21 11:14:17,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:17,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:17,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:17,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:17,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:17,455 INFO L87 Difference]: Start difference. First operand 3682 states and 4491 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:18,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:18,925 INFO L93 Difference]: Finished difference Result 7661 states and 9291 transitions. [2021-12-21 11:14:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:18,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 304 [2021-12-21 11:14:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:18,938 INFO L225 Difference]: With dead ends: 7661 [2021-12-21 11:14:18,938 INFO L226 Difference]: Without dead ends: 3981 [2021-12-21 11:14:18,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:18,943 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:18,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:14:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2021-12-21 11:14:18,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3981. [2021-12-21 11:14:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3980 states have (on average 1.2050251256281408) internal successors, (4796), 3980 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 4796 transitions. [2021-12-21 11:14:19,008 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 4796 transitions. Word has length 304 [2021-12-21 11:14:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:19,009 INFO L470 AbstractCegarLoop]: Abstraction has 3981 states and 4796 transitions. [2021-12-21 11:14:19,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:19,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 4796 transitions. [2021-12-21 11:14:19,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-12-21 11:14:19,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:19,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:19,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:14:19,014 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:19,014 INFO L85 PathProgramCache]: Analyzing trace with hash 579536590, now seen corresponding path program 1 times [2021-12-21 11:14:19,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:19,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874233911] [2021-12-21 11:14:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:19,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 11:14:19,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:19,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874233911] [2021-12-21 11:14:19,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874233911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:19,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:19,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:19,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026985150] [2021-12-21 11:14:19,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:19,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:19,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:19,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:19,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:19,178 INFO L87 Difference]: Start difference. First operand 3981 states and 4796 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:20,809 INFO L93 Difference]: Finished difference Result 8857 states and 10953 transitions. [2021-12-21 11:14:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:20,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 319 [2021-12-21 11:14:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:20,827 INFO L225 Difference]: With dead ends: 8857 [2021-12-21 11:14:20,828 INFO L226 Difference]: Without dead ends: 5177 [2021-12-21 11:14:20,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:20,837 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 283 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:20,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:14:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5177 states. [2021-12-21 11:14:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5177 to 3678. [2021-12-21 11:14:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3677 states have (on average 1.2181125917867828) internal successors, (4479), 3677 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:20,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 4479 transitions. [2021-12-21 11:14:20,911 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 4479 transitions. Word has length 319 [2021-12-21 11:14:20,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:20,912 INFO L470 AbstractCegarLoop]: Abstraction has 3678 states and 4479 transitions. [2021-12-21 11:14:20,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:20,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 4479 transitions. [2021-12-21 11:14:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-12-21 11:14:20,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:20,918 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:20,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:14:20,918 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:20,919 INFO L85 PathProgramCache]: Analyzing trace with hash -84480945, now seen corresponding path program 1 times [2021-12-21 11:14:20,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:20,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408194862] [2021-12-21 11:14:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:20,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-21 11:14:21,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:21,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408194862] [2021-12-21 11:14:21,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408194862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:21,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:21,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:21,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813340062] [2021-12-21 11:14:21,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:21,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:21,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:21,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:21,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:21,106 INFO L87 Difference]: Start difference. First operand 3678 states and 4479 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:22,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:22,477 INFO L93 Difference]: Finished difference Result 9157 states and 11369 transitions. [2021-12-21 11:14:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:22,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 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 378 [2021-12-21 11:14:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:22,492 INFO L225 Difference]: With dead ends: 9157 [2021-12-21 11:14:22,492 INFO L226 Difference]: Without dead ends: 5780 [2021-12-21 11:14:22,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:22,503 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 296 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:22,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 637 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:14:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2021-12-21 11:14:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 5182. [2021-12-21 11:14:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5182 states, 5181 states have (on average 1.1767998455896544) internal successors, (6097), 5181 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5182 states to 5182 states and 6097 transitions. [2021-12-21 11:14:22,589 INFO L78 Accepts]: Start accepts. Automaton has 5182 states and 6097 transitions. Word has length 378 [2021-12-21 11:14:22,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:22,589 INFO L470 AbstractCegarLoop]: Abstraction has 5182 states and 6097 transitions. [2021-12-21 11:14:22,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5182 states and 6097 transitions. [2021-12-21 11:14:22,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-12-21 11:14:22,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:22,596 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:22,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:14:22,596 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:22,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:22,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1647724765, now seen corresponding path program 1 times [2021-12-21 11:14:22,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:22,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114227333] [2021-12-21 11:14:22,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:22,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:14:22,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:22,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114227333] [2021-12-21 11:14:22,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114227333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:22,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:22,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:22,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858375622] [2021-12-21 11:14:22,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:22,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:22,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:22,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:22,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:22,801 INFO L87 Difference]: Start difference. First operand 5182 states and 6097 transitions. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:23,964 INFO L93 Difference]: Finished difference Result 10059 states and 11883 transitions. [2021-12-21 11:14:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:23,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 384 [2021-12-21 11:14:23,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:23,979 INFO L225 Difference]: With dead ends: 10059 [2021-12-21 11:14:23,980 INFO L226 Difference]: Without dead ends: 5178 [2021-12-21 11:14:23,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:23,985 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 314 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:23,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 144 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:14:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5178 states. [2021-12-21 11:14:24,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5178 to 5176. [2021-12-21 11:14:24,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 5175 states have (on average 1.1586473429951691) internal successors, (5996), 5175 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 5996 transitions. [2021-12-21 11:14:24,067 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 5996 transitions. Word has length 384 [2021-12-21 11:14:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:24,067 INFO L470 AbstractCegarLoop]: Abstraction has 5176 states and 5996 transitions. [2021-12-21 11:14:24,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 5996 transitions. [2021-12-21 11:14:24,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-12-21 11:14:24,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:24,071 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:24,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:14:24,073 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:24,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:24,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1013226234, now seen corresponding path program 1 times [2021-12-21 11:14:24,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:24,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886259937] [2021-12-21 11:14:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:24,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:14:24,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:24,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886259937] [2021-12-21 11:14:24,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886259937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:24,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:24,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:24,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019741117] [2021-12-21 11:14:24,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:24,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:24,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:24,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:24,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:24,237 INFO L87 Difference]: Start difference. First operand 5176 states and 5996 transitions. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:25,627 INFO L93 Difference]: Finished difference Result 11857 states and 13998 transitions. [2021-12-21 11:14:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:25,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-12-21 11:14:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:25,640 INFO L225 Difference]: With dead ends: 11857 [2021-12-21 11:14:25,640 INFO L226 Difference]: Without dead ends: 6982 [2021-12-21 11:14:25,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:25,645 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 247 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:25,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 599 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:14:25,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2021-12-21 11:14:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 6082. [2021-12-21 11:14:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6082 states, 6081 states have (on average 1.1494819930932412) internal successors, (6990), 6081 states have internal predecessors, (6990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:25,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6082 states to 6082 states and 6990 transitions. [2021-12-21 11:14:25,732 INFO L78 Accepts]: Start accepts. Automaton has 6082 states and 6990 transitions. Word has length 395 [2021-12-21 11:14:25,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:25,733 INFO L470 AbstractCegarLoop]: Abstraction has 6082 states and 6990 transitions. [2021-12-21 11:14:25,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 6082 states and 6990 transitions. [2021-12-21 11:14:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-12-21 11:14:25,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:25,737 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:25,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:14:25,738 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash 624859565, now seen corresponding path program 1 times [2021-12-21 11:14:25,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:25,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106892489] [2021-12-21 11:14:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:25,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:14:25,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:25,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106892489] [2021-12-21 11:14:25,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106892489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:14:25,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289372193] [2021-12-21 11:14:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:25,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:25,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:25,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:14:25,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:14:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:26,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:14:26,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:14:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-21 11:14:26,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:14:26,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289372193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:26,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:14:26,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 11:14:26,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128925008] [2021-12-21 11:14:26,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:26,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:26,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:26,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:14:26,895 INFO L87 Difference]: Start difference. First operand 6082 states and 6990 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:29,427 INFO L93 Difference]: Finished difference Result 14321 states and 16770 transitions. [2021-12-21 11:14:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:29,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 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 409 [2021-12-21 11:14:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:29,441 INFO L225 Difference]: With dead ends: 14321 [2021-12-21 11:14:29,442 INFO L226 Difference]: Without dead ends: 8540 [2021-12-21 11:14:29,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:14:29,448 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 384 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:29,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 540 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 11:14:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8540 states. [2021-12-21 11:14:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8540 to 8535. [2021-12-21 11:14:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8535 states, 8534 states have (on average 1.163229435200375) internal successors, (9927), 8534 states have internal predecessors, (9927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8535 states to 8535 states and 9927 transitions. [2021-12-21 11:14:29,556 INFO L78 Accepts]: Start accepts. Automaton has 8535 states and 9927 transitions. Word has length 409 [2021-12-21 11:14:29,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:29,557 INFO L470 AbstractCegarLoop]: Abstraction has 8535 states and 9927 transitions. [2021-12-21 11:14:29,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 8535 states and 9927 transitions. [2021-12-21 11:14:29,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-12-21 11:14:29,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:29,561 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:29,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:14:29,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 11:14:29,775 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:29,776 INFO L85 PathProgramCache]: Analyzing trace with hash -119436518, now seen corresponding path program 1 times [2021-12-21 11:14:29,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:29,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358686946] [2021-12-21 11:14:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:29,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 11:14:29,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:29,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358686946] [2021-12-21 11:14:29,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358686946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:29,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:29,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:29,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504042117] [2021-12-21 11:14:29,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:29,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:29,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:29,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:29,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:29,959 INFO L87 Difference]: Start difference. First operand 8535 states and 9927 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:31,339 INFO L93 Difference]: Finished difference Result 19164 states and 22694 transitions. [2021-12-21 11:14:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:31,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 411 [2021-12-21 11:14:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:31,357 INFO L225 Difference]: With dead ends: 19164 [2021-12-21 11:14:31,358 INFO L226 Difference]: Without dead ends: 10930 [2021-12-21 11:14:31,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:31,366 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 236 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:31,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 616 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:14:31,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10930 states. [2021-12-21 11:14:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10930 to 10926. [2021-12-21 11:14:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10926 states, 10925 states have (on average 1.1475514874141877) internal successors, (12537), 10925 states have internal predecessors, (12537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10926 states to 10926 states and 12537 transitions. [2021-12-21 11:14:31,484 INFO L78 Accepts]: Start accepts. Automaton has 10926 states and 12537 transitions. Word has length 411 [2021-12-21 11:14:31,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:31,485 INFO L470 AbstractCegarLoop]: Abstraction has 10926 states and 12537 transitions. [2021-12-21 11:14:31,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10926 states and 12537 transitions. [2021-12-21 11:14:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-12-21 11:14:31,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:31,490 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:31,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 11:14:31,491 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:31,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:31,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1176515794, now seen corresponding path program 1 times [2021-12-21 11:14:31,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:31,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240735950] [2021-12-21 11:14:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:31,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-21 11:14:31,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:31,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240735950] [2021-12-21 11:14:31,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240735950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:31,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:31,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:31,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869663767] [2021-12-21 11:14:31,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:31,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:31,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:31,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:31,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:31,740 INFO L87 Difference]: Start difference. First operand 10926 states and 12537 transitions. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:33,419 INFO L93 Difference]: Finished difference Result 28426 states and 32728 transitions. [2021-12-21 11:14:33,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:33,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 481 [2021-12-21 11:14:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:33,448 INFO L225 Difference]: With dead ends: 28426 [2021-12-21 11:14:33,449 INFO L226 Difference]: Without dead ends: 17801 [2021-12-21 11:14:33,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:33,461 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 303 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:33,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 191 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:14:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17801 states. [2021-12-21 11:14:33,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17801 to 15708. [2021-12-21 11:14:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15708 states, 15707 states have (on average 1.1423569109314318) internal successors, (17943), 15707 states have internal predecessors, (17943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15708 states to 15708 states and 17943 transitions. [2021-12-21 11:14:33,708 INFO L78 Accepts]: Start accepts. Automaton has 15708 states and 17943 transitions. Word has length 481 [2021-12-21 11:14:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:33,708 INFO L470 AbstractCegarLoop]: Abstraction has 15708 states and 17943 transitions. [2021-12-21 11:14:33,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 15708 states and 17943 transitions. [2021-12-21 11:14:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-12-21 11:14:33,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:33,713 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:33,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:14:33,714 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:33,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:33,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1477871461, now seen corresponding path program 1 times [2021-12-21 11:14:33,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:33,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293167189] [2021-12-21 11:14:33,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:33,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 469 proven. 39 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-21 11:14:33,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:33,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293167189] [2021-12-21 11:14:33,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293167189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:14:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786906279] [2021-12-21 11:14:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:33,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:33,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:33,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:14:33,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:14:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:34,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:14:34,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:14:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2021-12-21 11:14:34,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:14:34,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786906279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:34,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:14:34,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 11:14:34,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42583284] [2021-12-21 11:14:34,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:34,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:34,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:34,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:34,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:14:34,773 INFO L87 Difference]: Start difference. First operand 15708 states and 17943 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:36,248 INFO L93 Difference]: Finished difference Result 35596 states and 40688 transitions. [2021-12-21 11:14:36,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:36,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 516 [2021-12-21 11:14:36,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:36,278 INFO L225 Difference]: With dead ends: 35596 [2021-12-21 11:14:36,278 INFO L226 Difference]: Without dead ends: 20189 [2021-12-21 11:14:36,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:14:36,295 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 312 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:36,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 255 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:14:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20189 states. [2021-12-21 11:14:36,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20189 to 18393. [2021-12-21 11:14:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18393 states, 18392 states have (on average 1.1353305785123966) internal successors, (20881), 18392 states have internal predecessors, (20881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18393 states to 18393 states and 20881 transitions. [2021-12-21 11:14:36,518 INFO L78 Accepts]: Start accepts. Automaton has 18393 states and 20881 transitions. Word has length 516 [2021-12-21 11:14:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:36,519 INFO L470 AbstractCegarLoop]: Abstraction has 18393 states and 20881 transitions. [2021-12-21 11:14:36,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 18393 states and 20881 transitions. [2021-12-21 11:14:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-12-21 11:14:36,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:36,524 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:36,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 11:14:36,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 11:14:36,747 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:36,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash -629138351, now seen corresponding path program 1 times [2021-12-21 11:14:36,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:36,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134005909] [2021-12-21 11:14:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:36,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-21 11:14:36,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:36,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134005909] [2021-12-21 11:14:36,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134005909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:36,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:36,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:36,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884776637] [2021-12-21 11:14:36,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:36,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:36,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:36,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:36,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:36,971 INFO L87 Difference]: Start difference. First operand 18393 states and 20881 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:38,440 INFO L93 Difference]: Finished difference Result 44283 states and 50642 transitions. [2021-12-21 11:14:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:38,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 520 [2021-12-21 11:14:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:38,476 INFO L225 Difference]: With dead ends: 44283 [2021-12-21 11:14:38,476 INFO L226 Difference]: Without dead ends: 26191 [2021-12-21 11:14:38,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:38,494 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 246 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:38,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 596 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:14:38,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26191 states. [2021-12-21 11:14:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26191 to 25573. [2021-12-21 11:14:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25573 states, 25572 states have (on average 1.124745815735961) internal successors, (28762), 25572 states have internal predecessors, (28762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25573 states to 25573 states and 28762 transitions. [2021-12-21 11:14:38,892 INFO L78 Accepts]: Start accepts. Automaton has 25573 states and 28762 transitions. Word has length 520 [2021-12-21 11:14:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:38,892 INFO L470 AbstractCegarLoop]: Abstraction has 25573 states and 28762 transitions. [2021-12-21 11:14:38,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 25573 states and 28762 transitions. [2021-12-21 11:14:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2021-12-21 11:14:38,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:38,900 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:38,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 11:14:38,901 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:38,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1866465979, now seen corresponding path program 1 times [2021-12-21 11:14:38,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:38,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775868608] [2021-12-21 11:14:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:38,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 527 proven. 39 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-21 11:14:39,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:39,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775868608] [2021-12-21 11:14:39,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775868608] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:14:39,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328054693] [2021-12-21 11:14:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:39,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:39,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:39,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:14:39,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:14:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:39,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:14:39,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:14:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-12-21 11:14:39,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:14:39,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328054693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:39,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:14:39,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 11:14:39,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683026137] [2021-12-21 11:14:39,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:39,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:39,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:39,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:39,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:14:39,980 INFO L87 Difference]: Start difference. First operand 25573 states and 28762 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 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) [2021-12-21 11:14:41,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:41,459 INFO L93 Difference]: Finished difference Result 54133 states and 61132 transitions. [2021-12-21 11:14:41,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:41,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 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) Word has length 560 [2021-12-21 11:14:41,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:41,495 INFO L225 Difference]: With dead ends: 54133 [2021-12-21 11:14:41,496 INFO L226 Difference]: Without dead ends: 28861 [2021-12-21 11:14:41,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:14:41,514 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 382 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:41,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 445 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:14:41,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28861 states. [2021-12-21 11:14:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28861 to 20430. [2021-12-21 11:14:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20430 states, 20429 states have (on average 1.1097948994077047) internal successors, (22672), 20429 states have internal predecessors, (22672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20430 states to 20430 states and 22672 transitions. [2021-12-21 11:14:41,859 INFO L78 Accepts]: Start accepts. Automaton has 20430 states and 22672 transitions. Word has length 560 [2021-12-21 11:14:41,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:41,859 INFO L470 AbstractCegarLoop]: Abstraction has 20430 states and 22672 transitions. [2021-12-21 11:14:41,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 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) [2021-12-21 11:14:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 20430 states and 22672 transitions. [2021-12-21 11:14:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-12-21 11:14:41,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:41,870 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:41,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 11:14:42,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:42,092 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1840183349, now seen corresponding path program 1 times [2021-12-21 11:14:42,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:42,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220750368] [2021-12-21 11:14:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:42,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2021-12-21 11:14:42,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:42,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220750368] [2021-12-21 11:14:42,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220750368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:42,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:42,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:42,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644971288] [2021-12-21 11:14:42,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:42,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:42,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:42,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:42,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:42,340 INFO L87 Difference]: Start difference. First operand 20430 states and 22672 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:43,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:43,780 INFO L93 Difference]: Finished difference Result 47149 states and 52394 transitions. [2021-12-21 11:14:43,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:43,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 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 594 [2021-12-21 11:14:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:43,801 INFO L225 Difference]: With dead ends: 47149 [2021-12-21 11:14:43,801 INFO L226 Difference]: Without dead ends: 23731 [2021-12-21 11:14:43,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:43,815 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 310 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:43,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 653 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:14:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23731 states. [2021-12-21 11:14:43,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23731 to 22834. [2021-12-21 11:14:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22834 states, 22833 states have (on average 1.084264003854071) internal successors, (24757), 22833 states have internal predecessors, (24757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:44,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22834 states to 22834 states and 24757 transitions. [2021-12-21 11:14:44,033 INFO L78 Accepts]: Start accepts. Automaton has 22834 states and 24757 transitions. Word has length 594 [2021-12-21 11:14:44,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:44,033 INFO L470 AbstractCegarLoop]: Abstraction has 22834 states and 24757 transitions. [2021-12-21 11:14:44,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:44,034 INFO L276 IsEmpty]: Start isEmpty. Operand 22834 states and 24757 transitions. [2021-12-21 11:14:44,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2021-12-21 11:14:44,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:44,041 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:44,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 11:14:44,041 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:44,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:44,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1668920954, now seen corresponding path program 1 times [2021-12-21 11:14:44,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:44,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139788031] [2021-12-21 11:14:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:44,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-12-21 11:14:44,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:44,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139788031] [2021-12-21 11:14:44,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139788031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:44,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:44,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:44,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966681957] [2021-12-21 11:14:44,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:44,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:44,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:44,280 INFO L87 Difference]: Start difference. First operand 22834 states and 24757 transitions. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:45,343 INFO L93 Difference]: Finished difference Result 45066 states and 48897 transitions. [2021-12-21 11:14:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:45,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 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 615 [2021-12-21 11:14:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:45,367 INFO L225 Difference]: With dead ends: 45066 [2021-12-21 11:14:45,367 INFO L226 Difference]: Without dead ends: 22533 [2021-12-21 11:14:45,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:45,382 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 464 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:45,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 70 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 11:14:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22533 states. [2021-12-21 11:14:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22533 to 22533. [2021-12-21 11:14:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22533 states, 22532 states have (on average 1.084901473459968) internal successors, (24445), 22532 states have internal predecessors, (24445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22533 states to 22533 states and 24445 transitions. [2021-12-21 11:14:45,663 INFO L78 Accepts]: Start accepts. Automaton has 22533 states and 24445 transitions. Word has length 615 [2021-12-21 11:14:45,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:45,664 INFO L470 AbstractCegarLoop]: Abstraction has 22533 states and 24445 transitions. [2021-12-21 11:14:45,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22533 states and 24445 transitions. [2021-12-21 11:14:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2021-12-21 11:14:45,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:45,672 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:45,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 11:14:45,673 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:45,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1206065002, now seen corresponding path program 1 times [2021-12-21 11:14:45,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:45,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794939951] [2021-12-21 11:14:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:45,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 685 proven. 39 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-12-21 11:14:45,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:45,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794939951] [2021-12-21 11:14:45,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794939951] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:14:45,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144300289] [2021-12-21 11:14:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:45,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:45,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:45,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:14:45,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 11:14:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:46,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:14:46,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:14:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 560 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2021-12-21 11:14:46,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:14:46,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144300289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:46,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:14:46,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 11:14:46,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978791167] [2021-12-21 11:14:46,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:46,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:46,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:46,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:46,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:14:46,992 INFO L87 Difference]: Start difference. First operand 22533 states and 24445 transitions. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:48,293 INFO L93 Difference]: Finished difference Result 44460 states and 48271 transitions. [2021-12-21 11:14:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:48,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 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 642 [2021-12-21 11:14:48,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:48,320 INFO L225 Difference]: With dead ends: 44460 [2021-12-21 11:14:48,321 INFO L226 Difference]: Without dead ends: 22228 [2021-12-21 11:14:48,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 641 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:14:48,337 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 202 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:48,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 566 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:14:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22228 states. [2021-12-21 11:14:48,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22228 to 21630. [2021-12-21 11:14:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21630 states, 21629 states have (on average 1.0579777151047205) internal successors, (22883), 21629 states have internal predecessors, (22883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21630 states to 21630 states and 22883 transitions. [2021-12-21 11:14:48,668 INFO L78 Accepts]: Start accepts. Automaton has 21630 states and 22883 transitions. Word has length 642 [2021-12-21 11:14:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:48,668 INFO L470 AbstractCegarLoop]: Abstraction has 21630 states and 22883 transitions. [2021-12-21 11:14:48,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 21630 states and 22883 transitions. [2021-12-21 11:14:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2021-12-21 11:14:48,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:48,678 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:48,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 11:14:48,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 11:14:48,910 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:48,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:48,910 INFO L85 PathProgramCache]: Analyzing trace with hash 291937418, now seen corresponding path program 1 times [2021-12-21 11:14:48,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:48,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250966649] [2021-12-21 11:14:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:48,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 625 proven. 39 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-12-21 11:14:49,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:49,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250966649] [2021-12-21 11:14:49,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250966649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:14:49,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135392120] [2021-12-21 11:14:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:49,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:49,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:49,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:14:49,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 11:14:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:49,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 11:14:49,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:14:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 625 proven. 39 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-12-21 11:14:50,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:14:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 625 proven. 39 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-12-21 11:14:51,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135392120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:14:51,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:14:51,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-21 11:14:51,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307729091] [2021-12-21 11:14:51,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:14:51,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 11:14:51,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 11:14:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:14:51,943 INFO L87 Difference]: Start difference. First operand 21630 states and 22883 transitions. Second operand has 9 states, 9 states have (on average 86.33333333333333) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:56,112 INFO L93 Difference]: Finished difference Result 51293 states and 54243 transitions. [2021-12-21 11:14:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 11:14:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 86.33333333333333) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 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 656 [2021-12-21 11:14:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:56,132 INFO L225 Difference]: With dead ends: 51293 [2021-12-21 11:14:56,132 INFO L226 Difference]: Without dead ends: 23425 [2021-12-21 11:14:56,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1321 GetRequests, 1306 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-21 11:14:56,144 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 3103 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4621 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3103 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 5104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 4621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:56,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3103 Valid, 200 Invalid, 5104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 4621 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-21 11:14:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23425 states. [2021-12-21 11:14:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23425 to 19535. [2021-12-21 11:14:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19535 states, 19534 states have (on average 1.0309204464011468) internal successors, (20138), 19534 states have internal predecessors, (20138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19535 states to 19535 states and 20138 transitions. [2021-12-21 11:14:56,314 INFO L78 Accepts]: Start accepts. Automaton has 19535 states and 20138 transitions. Word has length 656 [2021-12-21 11:14:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:56,314 INFO L470 AbstractCegarLoop]: Abstraction has 19535 states and 20138 transitions. [2021-12-21 11:14:56,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 86.33333333333333) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 19535 states and 20138 transitions. [2021-12-21 11:14:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2021-12-21 11:14:56,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:56,320 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:56,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 11:14:56,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:56,521 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:56,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2007667598, now seen corresponding path program 1 times [2021-12-21 11:14:56,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:56,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969284845] [2021-12-21 11:14:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:56,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 473 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-21 11:14:56,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:56,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969284845] [2021-12-21 11:14:56,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969284845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:56,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:56,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:14:56,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829708248] [2021-12-21 11:14:56,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:56,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:14:56,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:56,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:14:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:14:56,735 INFO L87 Difference]: Start difference. First operand 19535 states and 20138 transitions. Second operand has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:58,174 INFO L93 Difference]: Finished difference Result 41764 states and 43075 transitions. [2021-12-21 11:14:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:14:58,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 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 659 [2021-12-21 11:14:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:58,194 INFO L225 Difference]: With dead ends: 41764 [2021-12-21 11:14:58,194 INFO L226 Difference]: Without dead ends: 22530 [2021-12-21 11:14:58,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:14:58,206 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 616 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:58,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 419 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:14:58,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22530 states. [2021-12-21 11:14:58,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22530 to 21929. [2021-12-21 11:14:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 21928 states have (on average 1.0263589930682233) internal successors, (22506), 21928 states have internal predecessors, (22506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 22506 transitions. [2021-12-21 11:14:58,426 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 22506 transitions. Word has length 659 [2021-12-21 11:14:58,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:58,426 INFO L470 AbstractCegarLoop]: Abstraction has 21929 states and 22506 transitions. [2021-12-21 11:14:58,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 22506 transitions. [2021-12-21 11:14:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2021-12-21 11:14:58,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:58,437 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:58,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 11:14:58,437 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1673837868, now seen corresponding path program 1 times [2021-12-21 11:14:58,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:58,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529094871] [2021-12-21 11:14:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:58,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-21 11:14:58,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:58,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529094871] [2021-12-21 11:14:58,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529094871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:58,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:58,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:58,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934328392] [2021-12-21 11:14:58,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:58,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:58,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:58,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:58,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:58,651 INFO L87 Difference]: Start difference. First operand 21929 states and 22506 transitions. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:59,767 INFO L93 Difference]: Finished difference Result 46858 states and 48100 transitions. [2021-12-21 11:14:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 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 699 [2021-12-21 11:14:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:59,792 INFO L225 Difference]: With dead ends: 46858 [2021-12-21 11:14:59,792 INFO L226 Difference]: Without dead ends: 25230 [2021-12-21 11:14:59,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:59,805 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 347 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:59,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 118 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:14:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25230 states. [2021-12-21 11:14:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25230 to 21926. [2021-12-21 11:14:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21926 states, 21925 states have (on average 1.024903078677309) internal successors, (22471), 21925 states have internal predecessors, (22471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21926 states to 21926 states and 22471 transitions. [2021-12-21 11:14:59,987 INFO L78 Accepts]: Start accepts. Automaton has 21926 states and 22471 transitions. Word has length 699 [2021-12-21 11:14:59,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:59,988 INFO L470 AbstractCegarLoop]: Abstraction has 21926 states and 22471 transitions. [2021-12-21 11:14:59,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 21926 states and 22471 transitions. [2021-12-21 11:14:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2021-12-21 11:14:59,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:59,995 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:59,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 11:14:59,995 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:59,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:59,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1173180747, now seen corresponding path program 1 times [2021-12-21 11:14:59,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:59,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869425779] [2021-12-21 11:14:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:59,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:15:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:15:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-21 11:15:00,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:15:00,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869425779] [2021-12-21 11:15:00,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869425779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:15:00,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:15:00,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:15:00,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618154637] [2021-12-21 11:15:00,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:15:00,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:15:00,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:15:00,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:15:00,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:15:00,298 INFO L87 Difference]: Start difference. First operand 21926 states and 22471 transitions. Second operand has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)