./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem14_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem14_label09.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 1b3a5c95c10076386b15606d0ac6559403dceee57f74bca8a711eb692be2f98e --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:46:57,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:46:57,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:46:57,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:46:57,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:46:57,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:46:57,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:46:57,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:46:57,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:46:57,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:46:57,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:46:57,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:46:57,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:46:57,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:46:57,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:46:57,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:46:57,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:46:57,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:46:57,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:46:57,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:46:57,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:46:57,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:46:57,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:46:57,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:46:57,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:46:57,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:46:57,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:46:57,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:46:57,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:46:57,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:46:57,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:46:57,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:46:57,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:46:57,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:46:57,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:46:57,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:46:57,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:46:57,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:46:57,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:46:57,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:46:57,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:46:57,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:46:57,497 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:46:57,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:46:57,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:46:57,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:46:57,498 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:46:57,499 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:46:57,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:46:57,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:46:57,499 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:46:57,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:46:57,500 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:46:57,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:46:57,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:46:57,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:46:57,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:46:57,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:46:57,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:46:57,501 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:46:57,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:46:57,501 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:46:57,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:46:57,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:46:57,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:46:57,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:46:57,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:46:57,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:46:57,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:46:57,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:46:57,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:46:57,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:46:57,505 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:46:57,505 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:46:57,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:46:57,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:46:57,506 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b3a5c95c10076386b15606d0ac6559403dceee57f74bca8a711eb692be2f98e [2021-12-15 09:46:57,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:46:57,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:46:57,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:46:57,731 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:46:57,732 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:46:57,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem14_label09.c [2021-12-15 09:46:57,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52ee57176/2482bfd94dde427c9d5a0bb5227a8b41/FLAG3ffcc05e6 [2021-12-15 09:46:58,234 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:46:58,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label09.c [2021-12-15 09:46:58,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52ee57176/2482bfd94dde427c9d5a0bb5227a8b41/FLAG3ffcc05e6 [2021-12-15 09:46:58,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52ee57176/2482bfd94dde427c9d5a0bb5227a8b41 [2021-12-15 09:46:58,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:46:58,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:46:58,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:46:58,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:46:58,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:46:58,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:46:58" (1/1) ... [2021-12-15 09:46:58,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9e06f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:58, skipping insertion in model container [2021-12-15 09:46:58,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:46:58" (1/1) ... [2021-12-15 09:46:58,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:46:58,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:46:59,062 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/Problem14_label09.c[4722,4735] [2021-12-15 09:46:59,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:46:59,213 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:46:59,235 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/Problem14_label09.c[4722,4735] [2021-12-15 09:46:59,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:46:59,347 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:46:59,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:59 WrapperNode [2021-12-15 09:46:59,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:46:59,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:46:59,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:46:59,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:46:59,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:59" (1/1) ... [2021-12-15 09:46:59,375 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:59" (1/1) ... [2021-12-15 09:46:59,446 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2021-12-15 09:46:59,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:46:59,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:46:59,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:46:59,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:46:59,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:59" (1/1) ... [2021-12-15 09:46:59,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:59" (1/1) ... [2021-12-15 09:46:59,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:59" (1/1) ... [2021-12-15 09:46:59,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:59" (1/1) ... [2021-12-15 09:46:59,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:59" (1/1) ... [2021-12-15 09:46:59,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:59" (1/1) ... [2021-12-15 09:46:59,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:59" (1/1) ... [2021-12-15 09:46:59,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:46:59,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:46:59,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:46:59,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:46:59,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:59" (1/1) ... [2021-12-15 09:46:59,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:46:59,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:46:59,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:46:59,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:46:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:46:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:46:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:46:59,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:46:59,685 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:46:59,686 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:47:00,531 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:47:00,544 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:47:00,545 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:47:00,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:47:00 BoogieIcfgContainer [2021-12-15 09:47:00,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:47:00,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:47:00,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:47:00,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:47:00,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:46:58" (1/3) ... [2021-12-15 09:47:00,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a22fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:47:00, skipping insertion in model container [2021-12-15 09:47:00,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:59" (2/3) ... [2021-12-15 09:47:00,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a22fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:47:00, skipping insertion in model container [2021-12-15 09:47:00,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:47:00" (3/3) ... [2021-12-15 09:47:00,571 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label09.c [2021-12-15 09:47:00,578 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:47:00,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:47:00,630 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:47:00,635 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:47:00,635 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:47:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 09:47:00,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:00,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:47:00,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:00,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2021-12-15 09:47:00,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:00,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286493007] [2021-12-15 09:47:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:00,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:47:00,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:00,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286493007] [2021-12-15 09:47:00,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286493007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:00,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:47:00,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:47:00,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99946279] [2021-12-15 09:47:00,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:00,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:47:00,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:01,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:47:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:47:01,011 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 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 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:02,384 INFO L93 Difference]: Finished difference Result 850 states and 1558 transitions. [2021-12-15 09:47:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:47:02,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-15 09:47:02,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:02,398 INFO L225 Difference]: With dead ends: 850 [2021-12-15 09:47:02,398 INFO L226 Difference]: Without dead ends: 538 [2021-12-15 09:47:02,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:47:02,405 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 498 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:02,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 194 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:47:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-12-15 09:47:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-12-15 09:47:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.4487895716945995) internal successors, (778), 537 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:02,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 778 transitions. [2021-12-15 09:47:02,462 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 778 transitions. Word has length 45 [2021-12-15 09:47:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:02,464 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 778 transitions. [2021-12-15 09:47:02,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:02,464 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 778 transitions. [2021-12-15 09:47:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-15 09:47:02,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:02,468 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, 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] [2021-12-15 09:47:02,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:47:02,469 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:02,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1796285180, now seen corresponding path program 1 times [2021-12-15 09:47:02,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:02,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922726366] [2021-12-15 09:47:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:02,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:47:02,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:02,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922726366] [2021-12-15 09:47:02,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922726366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:02,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:47:02,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:47:02,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076206050] [2021-12-15 09:47:02,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:02,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:47:02,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:02,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:47:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:47:02,643 INFO L87 Difference]: Start difference. First operand 538 states and 778 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 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) [2021-12-15 09:47:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:03,384 INFO L93 Difference]: Finished difference Result 1281 states and 1978 transitions. [2021-12-15 09:47:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:47:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 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 125 [2021-12-15 09:47:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:03,389 INFO L225 Difference]: With dead ends: 1281 [2021-12-15 09:47:03,389 INFO L226 Difference]: Without dead ends: 894 [2021-12-15 09:47:03,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:47:03,392 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 118 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:03,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 119 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:47:03,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-12-15 09:47:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 716. [2021-12-15 09:47:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.220979020979021) internal successors, (873), 715 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 873 transitions. [2021-12-15 09:47:03,415 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 873 transitions. Word has length 125 [2021-12-15 09:47:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:03,415 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 873 transitions. [2021-12-15 09:47:03,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 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) [2021-12-15 09:47:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 873 transitions. [2021-12-15 09:47:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-15 09:47:03,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:03,424 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:47:03,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:47:03,424 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:03,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2036921752, now seen corresponding path program 1 times [2021-12-15 09:47:03,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:03,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530100109] [2021-12-15 09:47:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:03,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:47:03,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530100109] [2021-12-15 09:47:03,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530100109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:47:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618493391] [2021-12-15 09:47:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:03,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:03,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:47:03,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:47:03,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:47:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:03,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:47:03,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:47:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-15 09:47:04,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:47:04,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618493391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:04,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:47:04,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 09:47:04,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702106306] [2021-12-15 09:47:04,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:04,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:47:04,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:04,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:47:04,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:47:04,226 INFO L87 Difference]: Start difference. First operand 716 states and 873 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:04,715 INFO L93 Difference]: Finished difference Result 1608 states and 2071 transitions. [2021-12-15 09:47:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:47:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-12-15 09:47:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:04,719 INFO L225 Difference]: With dead ends: 1608 [2021-12-15 09:47:04,720 INFO L226 Difference]: Without dead ends: 1072 [2021-12-15 09:47:04,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:47:04,721 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 84 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:04,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 47 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:47:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-12-15 09:47:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-12-15 09:47:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.2156862745098038) internal successors, (1302), 1071 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1302 transitions. [2021-12-15 09:47:04,740 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1302 transitions. Word has length 216 [2021-12-15 09:47:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:04,740 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1302 transitions. [2021-12-15 09:47:04,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1302 transitions. [2021-12-15 09:47:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-15 09:47:04,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:04,744 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:47:04,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:47:04,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:04,968 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:04,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1670561777, now seen corresponding path program 1 times [2021-12-15 09:47:04,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:04,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709530559] [2021-12-15 09:47:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:04,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:47:05,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:05,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709530559] [2021-12-15 09:47:05,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709530559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:05,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:47:05,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:47:05,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835989920] [2021-12-15 09:47:05,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:05,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:47:05,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:05,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:47:05,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:47:05,066 INFO L87 Difference]: Start difference. First operand 1072 states and 1302 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:05,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:05,572 INFO L93 Difference]: Finished difference Result 2498 states and 3070 transitions. [2021-12-15 09:47:05,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:47:05,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 219 [2021-12-15 09:47:05,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:05,577 INFO L225 Difference]: With dead ends: 2498 [2021-12-15 09:47:05,577 INFO L226 Difference]: Without dead ends: 1606 [2021-12-15 09:47:05,578 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 [2021-12-15 09:47:05,580 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 111 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:05,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 77 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:47:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-12-15 09:47:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1606. [2021-12-15 09:47:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.168847352024922) internal successors, (1876), 1605 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1876 transitions. [2021-12-15 09:47:05,606 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1876 transitions. Word has length 219 [2021-12-15 09:47:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:05,606 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 1876 transitions. [2021-12-15 09:47:05,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1876 transitions. [2021-12-15 09:47:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-12-15 09:47:05,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:05,611 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, 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, 2, 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] [2021-12-15 09:47:05,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:47:05,611 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash -841281577, now seen corresponding path program 1 times [2021-12-15 09:47:05,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:05,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711106636] [2021-12-15 09:47:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:05,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-12-15 09:47:05,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:05,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711106636] [2021-12-15 09:47:05,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711106636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:05,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:47:05,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:47:05,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249320539] [2021-12-15 09:47:05,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:05,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:47:05,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:05,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:47:05,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:47:05,775 INFO L87 Difference]: Start difference. First operand 1606 states and 1876 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:06,324 INFO L93 Difference]: Finished difference Result 3061 states and 3636 transitions. [2021-12-15 09:47:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:47:06,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 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 336 [2021-12-15 09:47:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:06,334 INFO L225 Difference]: With dead ends: 3061 [2021-12-15 09:47:06,334 INFO L226 Difference]: Without dead ends: 1784 [2021-12-15 09:47:06,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:47:06,337 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 125 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:06,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 17 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:47:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-12-15 09:47:06,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1606. [2021-12-15 09:47:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.1196261682242992) internal successors, (1797), 1605 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1797 transitions. [2021-12-15 09:47:06,365 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1797 transitions. Word has length 336 [2021-12-15 09:47:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:06,366 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 1797 transitions. [2021-12-15 09:47:06,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1797 transitions. [2021-12-15 09:47:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2021-12-15 09:47:06,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:06,372 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, 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, 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] [2021-12-15 09:47:06,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:47:06,373 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:06,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1590776259, now seen corresponding path program 1 times [2021-12-15 09:47:06,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:06,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714345682] [2021-12-15 09:47:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:06,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-15 09:47:06,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:06,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714345682] [2021-12-15 09:47:06,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714345682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:47:06,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678937185] [2021-12-15 09:47:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:06,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:06,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:47:06,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:47:06,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:47:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:06,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:47:06,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:47:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-12-15 09:47:07,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:47:07,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678937185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:07,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:47:07,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:47:07,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156611973] [2021-12-15 09:47:07,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:07,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:47:07,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:47:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:47:07,380 INFO L87 Difference]: Start difference. First operand 1606 states and 1797 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:07,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:07,791 INFO L93 Difference]: Finished difference Result 2320 states and 2566 transitions. [2021-12-15 09:47:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:47:07,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 425 [2021-12-15 09:47:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:07,799 INFO L225 Difference]: With dead ends: 2320 [2021-12-15 09:47:07,799 INFO L226 Difference]: Without dead ends: 2318 [2021-12-15 09:47:07,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:47:07,800 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:07,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 11 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:47:07,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-12-15 09:47:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 1428. [2021-12-15 09:47:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.0939032936229853) internal successors, (1561), 1427 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:07,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1561 transitions. [2021-12-15 09:47:07,827 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1561 transitions. Word has length 425 [2021-12-15 09:47:07,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:07,827 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 1561 transitions. [2021-12-15 09:47:07,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1561 transitions. [2021-12-15 09:47:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2021-12-15 09:47:07,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:07,833 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, 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, 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, 1, 1, 1, 1, 1, 1] [2021-12-15 09:47:07,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:47:08,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 09:47:08,048 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:08,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:08,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1026613071, now seen corresponding path program 1 times [2021-12-15 09:47:08,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:08,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714257725] [2021-12-15 09:47:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:08,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 377 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-15 09:47:08,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:08,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714257725] [2021-12-15 09:47:08,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714257725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:08,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:47:08,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:47:08,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693325082] [2021-12-15 09:47:08,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:08,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:47:08,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:47:08,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:47:08,201 INFO L87 Difference]: Start difference. First operand 1428 states and 1561 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:08,656 INFO L93 Difference]: Finished difference Result 3210 states and 3559 transitions. [2021-12-15 09:47:08,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:47:08,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 431 [2021-12-15 09:47:08,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:08,663 INFO L225 Difference]: With dead ends: 3210 [2021-12-15 09:47:08,664 INFO L226 Difference]: Without dead ends: 1962 [2021-12-15 09:47:08,665 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 [2021-12-15 09:47:08,666 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 110 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:08,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 245 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:47:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-12-15 09:47:08,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1606. [2021-12-15 09:47:08,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.0841121495327102) internal successors, (1740), 1605 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1740 transitions. [2021-12-15 09:47:08,693 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1740 transitions. Word has length 431 [2021-12-15 09:47:08,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:08,694 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 1740 transitions. [2021-12-15 09:47:08,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1740 transitions. [2021-12-15 09:47:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-12-15 09:47:08,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:08,700 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, 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, 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] [2021-12-15 09:47:08,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:47:08,701 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1829033834, now seen corresponding path program 1 times [2021-12-15 09:47:08,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:08,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142296209] [2021-12-15 09:47:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:08,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 377 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-15 09:47:08,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:08,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142296209] [2021-12-15 09:47:08,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142296209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:08,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:47:08,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:47:08,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799407899] [2021-12-15 09:47:08,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:08,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:47:08,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:08,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:47:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:47:08,825 INFO L87 Difference]: Start difference. First operand 1606 states and 1740 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) [2021-12-15 09:47:09,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:09,279 INFO L93 Difference]: Finished difference Result 3744 states and 4121 transitions. [2021-12-15 09:47:09,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:47:09,280 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 438 [2021-12-15 09:47:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:09,287 INFO L225 Difference]: With dead ends: 3744 [2021-12-15 09:47:09,287 INFO L226 Difference]: Without dead ends: 2318 [2021-12-15 09:47:09,289 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 [2021-12-15 09:47:09,290 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 111 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:09,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 243 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:47:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-12-15 09:47:09,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2140. [2021-12-15 09:47:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.0710612435717626) internal successors, (2291), 2139 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2291 transitions. [2021-12-15 09:47:09,325 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2291 transitions. Word has length 438 [2021-12-15 09:47:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:09,326 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2291 transitions. [2021-12-15 09:47:09,326 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) [2021-12-15 09:47:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2291 transitions. [2021-12-15 09:47:09,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2021-12-15 09:47:09,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:09,330 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 09:47:09,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:47:09,331 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:09,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:09,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1994977414, now seen corresponding path program 1 times [2021-12-15 09:47:09,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:09,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166696038] [2021-12-15 09:47:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:09,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 489 proven. 0 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2021-12-15 09:47:09,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:09,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166696038] [2021-12-15 09:47:09,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166696038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:09,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:47:09,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:47:09,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547480755] [2021-12-15 09:47:09,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:09,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:47:09,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:09,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:47:09,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:47:09,520 INFO L87 Difference]: Start difference. First operand 2140 states and 2291 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:09,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:09,957 INFO L93 Difference]: Finished difference Result 4634 states and 5028 transitions. [2021-12-15 09:47:09,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:47:09,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 593 [2021-12-15 09:47:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:09,965 INFO L225 Difference]: With dead ends: 4634 [2021-12-15 09:47:09,965 INFO L226 Difference]: Without dead ends: 2674 [2021-12-15 09:47:09,967 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 [2021-12-15 09:47:09,968 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 110 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:09,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 241 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:47:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-12-15 09:47:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2674. [2021-12-15 09:47:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2673 states have (on average 1.0688365132809576) internal successors, (2857), 2673 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:10,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 2857 transitions. [2021-12-15 09:47:10,005 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 2857 transitions. Word has length 593 [2021-12-15 09:47:10,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:10,006 INFO L470 AbstractCegarLoop]: Abstraction has 2674 states and 2857 transitions. [2021-12-15 09:47:10,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 2857 transitions. [2021-12-15 09:47:10,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2021-12-15 09:47:10,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:10,012 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 09:47:10,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:47:10,012 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1825460045, now seen corresponding path program 1 times [2021-12-15 09:47:10,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:10,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912980306] [2021-12-15 09:47:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:10,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 676 proven. 93 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2021-12-15 09:47:10,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:10,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912980306] [2021-12-15 09:47:10,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912980306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:47:10,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687499916] [2021-12-15 09:47:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:10,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:10,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:47:10,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:47:10,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:47:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:10,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:47:10,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:47:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 489 proven. 0 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2021-12-15 09:47:11,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:47:11,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687499916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:11,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:47:11,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:47:11,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758993720] [2021-12-15 09:47:11,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:11,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:47:11,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:11,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:47:11,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:47:11,676 INFO L87 Difference]: Start difference. First operand 2674 states and 2857 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:12,214 INFO L93 Difference]: Finished difference Result 5524 states and 5917 transitions. [2021-12-15 09:47:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:47:12,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 611 [2021-12-15 09:47:12,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:12,223 INFO L225 Difference]: With dead ends: 5524 [2021-12-15 09:47:12,223 INFO L226 Difference]: Without dead ends: 3030 [2021-12-15 09:47:12,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:47:12,226 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 121 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:12,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 50 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:47:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-12-15 09:47:12,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2852. [2021-12-15 09:47:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 1.0698000701508243) internal successors, (3050), 2851 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 3050 transitions. [2021-12-15 09:47:12,264 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 3050 transitions. Word has length 611 [2021-12-15 09:47:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:12,265 INFO L470 AbstractCegarLoop]: Abstraction has 2852 states and 3050 transitions. [2021-12-15 09:47:12,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 3050 transitions. [2021-12-15 09:47:12,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2021-12-15 09:47:12,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:12,270 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-12-15 09:47:12,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:47:12,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:12,484 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1713531829, now seen corresponding path program 1 times [2021-12-15 09:47:12,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:12,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545517955] [2021-12-15 09:47:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:12,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 857 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-15 09:47:12,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:12,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545517955] [2021-12-15 09:47:12,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545517955] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:47:12,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246378378] [2021-12-15 09:47:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:12,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:12,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:47:12,691 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:47:12,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:47:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:12,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:47:12,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:47:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 857 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-15 09:47:13,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:47:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 857 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-15 09:47:14,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246378378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:47:14,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:47:14,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-15 09:47:14,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223170446] [2021-12-15 09:47:14,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:47:14,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 09:47:14,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:14,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 09:47:14,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:47:14,740 INFO L87 Difference]: Start difference. First operand 2852 states and 3050 transitions. Second operand has 6 states, 6 states have (on average 115.33333333333333) internal successors, (692), 6 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:15,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:15,582 INFO L93 Difference]: Finished difference Result 7484 states and 8070 transitions. [2021-12-15 09:47:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:47:15,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 115.33333333333333) internal successors, (692), 6 states have internal predecessors, (692), 0 states have call successors, (0), 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 634 [2021-12-15 09:47:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:15,597 INFO L225 Difference]: With dead ends: 7484 [2021-12-15 09:47:15,597 INFO L226 Difference]: Without dead ends: 4812 [2021-12-15 09:47:15,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1270 GetRequests, 1266 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:47:15,600 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 335 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:15,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 67 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:47:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4812 states. [2021-12-15 09:47:15,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4812 to 3920. [2021-12-15 09:47:15,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 1.070170961980097) internal successors, (4194), 3919 states have internal predecessors, (4194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 4194 transitions. [2021-12-15 09:47:15,682 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 4194 transitions. Word has length 634 [2021-12-15 09:47:15,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:15,683 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 4194 transitions. [2021-12-15 09:47:15,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 115.33333333333333) internal successors, (692), 6 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:15,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 4194 transitions. [2021-12-15 09:47:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2021-12-15 09:47:15,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:15,692 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 3, 3, 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] [2021-12-15 09:47:15,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:47:15,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:15,908 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:15,908 INFO L85 PathProgramCache]: Analyzing trace with hash 649154932, now seen corresponding path program 1 times [2021-12-15 09:47:15,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:15,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317575080] [2021-12-15 09:47:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:15,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 1102 proven. 93 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-12-15 09:47:16,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:16,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317575080] [2021-12-15 09:47:16,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317575080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:47:16,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491072734] [2021-12-15 09:47:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:16,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:16,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:47:16,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:47:16,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:47:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 09:47:16,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:47:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 1199 proven. 108 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2021-12-15 09:47:20,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:47:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 666 proven. 323 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2021-12-15 09:47:27,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491072734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:47:27,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:47:27,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 11 [2021-12-15 09:47:27,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98887041] [2021-12-15 09:47:27,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:47:27,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 09:47:27,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:27,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 09:47:27,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-12-15 09:47:27,664 INFO L87 Difference]: Start difference. First operand 3920 states and 4194 transitions. Second operand has 12 states, 12 states have (on average 90.83333333333333) internal successors, (1090), 11 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:30,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:30,099 INFO L93 Difference]: Finished difference Result 10780 states and 11524 transitions. [2021-12-15 09:47:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 09:47:30,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 90.83333333333333) internal successors, (1090), 11 states have internal predecessors, (1090), 0 states have call successors, (0), 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 719 [2021-12-15 09:47:30,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:30,118 INFO L225 Difference]: With dead ends: 10780 [2021-12-15 09:47:30,119 INFO L226 Difference]: Without dead ends: 7040 [2021-12-15 09:47:30,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1451 GetRequests, 1430 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2021-12-15 09:47:30,123 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1284 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 3280 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 3543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 3280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:30,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 79 Invalid, 3543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 3280 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:47:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7040 states. [2021-12-15 09:47:30,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7040 to 4276. [2021-12-15 09:47:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 4275 states have (on average 1.0545029239766082) internal successors, (4508), 4275 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 4508 transitions. [2021-12-15 09:47:30,229 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 4508 transitions. Word has length 719 [2021-12-15 09:47:30,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:30,230 INFO L470 AbstractCegarLoop]: Abstraction has 4276 states and 4508 transitions. [2021-12-15 09:47:30,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 90.83333333333333) internal successors, (1090), 11 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 4508 transitions. [2021-12-15 09:47:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2021-12-15 09:47:30,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:30,238 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 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] [2021-12-15 09:47:30,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:47:30,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 09:47:30,460 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:30,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:30,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1327784350, now seen corresponding path program 1 times [2021-12-15 09:47:30,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:30,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59706236] [2021-12-15 09:47:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:30,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 1166 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-15 09:47:30,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:30,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59706236] [2021-12-15 09:47:30,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59706236] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:47:30,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111231021] [2021-12-15 09:47:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:30,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:30,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:47:30,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:47:30,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:47:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:30,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 09:47:30,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:47:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 879 proven. 0 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2021-12-15 09:47:32,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:47:32,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111231021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:32,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:47:32,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-15 09:47:32,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170310675] [2021-12-15 09:47:32,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:32,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:47:32,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:32,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:47:32,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:47:32,153 INFO L87 Difference]: Start difference. First operand 4276 states and 4508 transitions. Second operand has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:32,790 INFO L93 Difference]: Finished difference Result 9974 states and 10536 transitions. [2021-12-15 09:47:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:47:32,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 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 801 [2021-12-15 09:47:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:32,800 INFO L225 Difference]: With dead ends: 9974 [2021-12-15 09:47:32,800 INFO L226 Difference]: Without dead ends: 5878 [2021-12-15 09:47:32,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 800 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:47:32,804 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 213 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:32,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 54 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:47:32,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-12-15 09:47:32,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 5166. [2021-12-15 09:47:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5166 states, 5165 states have (on average 1.0561471442400774) internal successors, (5455), 5165 states have internal predecessors, (5455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5166 states to 5166 states and 5455 transitions. [2021-12-15 09:47:32,859 INFO L78 Accepts]: Start accepts. Automaton has 5166 states and 5455 transitions. Word has length 801 [2021-12-15 09:47:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:32,860 INFO L470 AbstractCegarLoop]: Abstraction has 5166 states and 5455 transitions. [2021-12-15 09:47:32,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 5166 states and 5455 transitions. [2021-12-15 09:47:32,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 804 [2021-12-15 09:47:32,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:32,867 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:47:32,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:47:33,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:33,087 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:33,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:33,088 INFO L85 PathProgramCache]: Analyzing trace with hash 776024818, now seen corresponding path program 1 times [2021-12-15 09:47:33,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:33,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314210917] [2021-12-15 09:47:33,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:33,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 797 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-12-15 09:47:33,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:33,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314210917] [2021-12-15 09:47:33,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314210917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:33,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:47:33,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:47:33,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428624044] [2021-12-15 09:47:33,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:33,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:47:33,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:33,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:47:33,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:47:33,366 INFO L87 Difference]: Start difference. First operand 5166 states and 5455 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:33,815 INFO L93 Difference]: Finished difference Result 11220 states and 11876 transitions. [2021-12-15 09:47:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:47:33,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 803 [2021-12-15 09:47:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:33,828 INFO L225 Difference]: With dead ends: 11220 [2021-12-15 09:47:33,829 INFO L226 Difference]: Without dead ends: 6056 [2021-12-15 09:47:33,833 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 [2021-12-15 09:47:33,834 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 71 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:33,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 245 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:47:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6056 states. [2021-12-15 09:47:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6056 to 5344. [2021-12-15 09:47:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5344 states, 5343 states have (on average 1.0495976043421298) internal successors, (5608), 5343 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:33,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 5608 transitions. [2021-12-15 09:47:33,898 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 5608 transitions. Word has length 803 [2021-12-15 09:47:33,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:33,899 INFO L470 AbstractCegarLoop]: Abstraction has 5344 states and 5608 transitions. [2021-12-15 09:47:33,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:33,899 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 5608 transitions. [2021-12-15 09:47:33,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2021-12-15 09:47:33,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:33,907 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:47:33,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:47:33,907 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:33,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:33,908 INFO L85 PathProgramCache]: Analyzing trace with hash 580335584, now seen corresponding path program 1 times [2021-12-15 09:47:33,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:33,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146292913] [2021-12-15 09:47:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:33,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2218 backedges. 1202 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-15 09:47:34,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:34,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146292913] [2021-12-15 09:47:34,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146292913] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:47:34,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594323435] [2021-12-15 09:47:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:34,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:34,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:47:34,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:47:34,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:47:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:34,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 09:47:34,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:47:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2218 backedges. 1305 proven. 522 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-15 09:47:35,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:47:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2218 backedges. 1274 proven. 0 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-15 09:47:37,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594323435] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:47:37,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:47:37,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 10 [2021-12-15 09:47:37,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135996644] [2021-12-15 09:47:37,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:37,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 09:47:37,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 09:47:37,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-15 09:47:37,442 INFO L87 Difference]: Start difference. First operand 5344 states and 5608 transitions. Second operand has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:37,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:37,852 INFO L93 Difference]: Finished difference Result 11576 states and 12129 transitions. [2021-12-15 09:47:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:47:37,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 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 834 [2021-12-15 09:47:37,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:37,862 INFO L225 Difference]: With dead ends: 11576 [2021-12-15 09:47:37,862 INFO L226 Difference]: Without dead ends: 6412 [2021-12-15 09:47:37,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1671 GetRequests, 1662 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-15 09:47:37,867 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 282 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:37,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 247 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 545 Invalid, 0 Unknown, 240 Unchecked, 0.4s Time] [2021-12-15 09:47:37,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6412 states. [2021-12-15 09:47:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6412 to 5700. [2021-12-15 09:47:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5700 states, 5699 states have (on average 1.0491314265660643) internal successors, (5979), 5699 states have internal predecessors, (5979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 5979 transitions. [2021-12-15 09:47:37,926 INFO L78 Accepts]: Start accepts. Automaton has 5700 states and 5979 transitions. Word has length 834 [2021-12-15 09:47:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:37,927 INFO L470 AbstractCegarLoop]: Abstraction has 5700 states and 5979 transitions. [2021-12-15 09:47:37,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:37,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5700 states and 5979 transitions. [2021-12-15 09:47:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2021-12-15 09:47:37,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:37,935 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:47:37,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 09:47:38,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:38,156 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:38,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1968437427, now seen corresponding path program 1 times [2021-12-15 09:47:38,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:38,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511764078] [2021-12-15 09:47:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:38,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 1203 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-15 09:47:38,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:38,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511764078] [2021-12-15 09:47:38,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511764078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:47:38,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920846357] [2021-12-15 09:47:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:38,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:38,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:47:38,407 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:47:38,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 09:47:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:38,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 09:47:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:47:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 1305 proven. 523 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-15 09:47:42,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:47:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 916 proven. 0 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2021-12-15 09:47:43,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920846357] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:47:43,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:47:43,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 6] total 9 [2021-12-15 09:47:43,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918988731] [2021-12-15 09:47:43,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:43,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:47:43,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:47:43,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:47:43,915 INFO L87 Difference]: Start difference. First operand 5700 states and 5979 transitions. Second operand has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:44,417 INFO L93 Difference]: Finished difference Result 11754 states and 12335 transitions. [2021-12-15 09:47:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:47:44,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 835 [2021-12-15 09:47:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:44,426 INFO L225 Difference]: With dead ends: 11754 [2021-12-15 09:47:44,427 INFO L226 Difference]: Without dead ends: 6234 [2021-12-15 09:47:44,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1673 GetRequests, 1623 SyntacticMatches, 43 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:47:44,431 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 234 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:44,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 10 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:47:44,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6234 states. [2021-12-15 09:47:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6234 to 5878. [2021-12-15 09:47:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 1.0493449038625149) internal successors, (6167), 5877 states have internal predecessors, (6167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 6167 transitions. [2021-12-15 09:47:44,511 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 6167 transitions. Word has length 835 [2021-12-15 09:47:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:44,511 INFO L470 AbstractCegarLoop]: Abstraction has 5878 states and 6167 transitions. [2021-12-15 09:47:44,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:44,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 6167 transitions. [2021-12-15 09:47:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 888 [2021-12-15 09:47:44,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:44,523 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:47:44,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 09:47:44,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 09:47:44,740 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:44,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:44,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1839900235, now seen corresponding path program 1 times [2021-12-15 09:47:44,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:44,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591130206] [2021-12-15 09:47:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:44,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2419 backedges. 1432 proven. 0 refuted. 0 times theorem prover too weak. 987 trivial. 0 not checked. [2021-12-15 09:47:44,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:44,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591130206] [2021-12-15 09:47:44,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591130206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:44,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:47:44,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:47:44,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046734559] [2021-12-15 09:47:44,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:44,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:47:44,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:44,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:47:44,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:47:44,979 INFO L87 Difference]: Start difference. First operand 5878 states and 6167 transitions. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:45,386 INFO L93 Difference]: Finished difference Result 11932 states and 12557 transitions. [2021-12-15 09:47:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:47:45,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 887 [2021-12-15 09:47:45,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:45,396 INFO L225 Difference]: With dead ends: 11932 [2021-12-15 09:47:45,396 INFO L226 Difference]: Without dead ends: 6234 [2021-12-15 09:47:45,402 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 [2021-12-15 09:47:45,403 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:45,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 231 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:47:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6234 states. [2021-12-15 09:47:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6234 to 5878. [2021-12-15 09:47:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 1.0496852135443253) internal successors, (6169), 5877 states have internal predecessors, (6169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 6169 transitions. [2021-12-15 09:47:45,467 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 6169 transitions. Word has length 887 [2021-12-15 09:47:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:45,468 INFO L470 AbstractCegarLoop]: Abstraction has 5878 states and 6169 transitions. [2021-12-15 09:47:45,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 6169 transitions. [2021-12-15 09:47:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2021-12-15 09:47:45,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:45,478 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 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, 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] [2021-12-15 09:47:45,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 09:47:45,478 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:45,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1233679576, now seen corresponding path program 1 times [2021-12-15 09:47:45,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:45,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273265523] [2021-12-15 09:47:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:45,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 950 proven. 0 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-12-15 09:47:45,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:45,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273265523] [2021-12-15 09:47:45,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273265523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:45,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:47:45,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:47:45,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673307337] [2021-12-15 09:47:45,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:45,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:47:45,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:47:45,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:47:45,819 INFO L87 Difference]: Start difference. First operand 5878 states and 6169 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:46,222 INFO L93 Difference]: Finished difference Result 11754 states and 12336 transitions. [2021-12-15 09:47:46,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:47:46,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 961 [2021-12-15 09:47:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:46,228 INFO L225 Difference]: With dead ends: 11754 [2021-12-15 09:47:46,228 INFO L226 Difference]: Without dead ends: 6056 [2021-12-15 09:47:46,233 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 [2021-12-15 09:47:46,233 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 69 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:46,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 232 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:47:46,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6056 states. [2021-12-15 09:47:46,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6056 to 5522. [2021-12-15 09:47:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5522 states, 5521 states have (on average 1.0393044738272053) internal successors, (5738), 5521 states have internal predecessors, (5738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5522 states to 5522 states and 5738 transitions. [2021-12-15 09:47:46,293 INFO L78 Accepts]: Start accepts. Automaton has 5522 states and 5738 transitions. Word has length 961 [2021-12-15 09:47:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:46,294 INFO L470 AbstractCegarLoop]: Abstraction has 5522 states and 5738 transitions. [2021-12-15 09:47:46,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5522 states and 5738 transitions. [2021-12-15 09:47:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1394 [2021-12-15 09:47:46,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:46,311 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:47:46,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:47:46,312 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:46,313 INFO L85 PathProgramCache]: Analyzing trace with hash 960342611, now seen corresponding path program 1 times [2021-12-15 09:47:46,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:46,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938894812] [2021-12-15 09:47:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:46,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5988 backedges. 1412 proven. 0 refuted. 0 times theorem prover too weak. 4576 trivial. 0 not checked. [2021-12-15 09:47:46,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:46,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938894812] [2021-12-15 09:47:46,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938894812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:46,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:47:46,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:47:46,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628365863] [2021-12-15 09:47:46,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:46,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 09:47:46,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:46,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 09:47:46,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:47:46,809 INFO L87 Difference]: Start difference. First operand 5522 states and 5738 transitions. Second operand has 5 states, 5 states have (on average 66.4) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:47,601 INFO L93 Difference]: Finished difference Result 11422 states and 11867 transitions. [2021-12-15 09:47:47,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:47:47,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 66.4) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1393 [2021-12-15 09:47:47,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:47,608 INFO L225 Difference]: With dead ends: 11422 [2021-12-15 09:47:47,608 INFO L226 Difference]: Without dead ends: 6056 [2021-12-15 09:47:47,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:47:47,613 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:47,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 27 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:47:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6056 states. [2021-12-15 09:47:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6056 to 5878. [2021-12-15 09:47:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 1.035732516590097) internal successors, (6087), 5877 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 6087 transitions. [2021-12-15 09:47:47,683 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 6087 transitions. Word has length 1393 [2021-12-15 09:47:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:47,683 INFO L470 AbstractCegarLoop]: Abstraction has 5878 states and 6087 transitions. [2021-12-15 09:47:47,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.4) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:47:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 6087 transitions. [2021-12-15 09:47:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1512 [2021-12-15 09:47:47,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:47,704 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 7, 7, 7, 6, 6, 6, 5, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:47:47,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 09:47:47,704 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:47,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:47,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1140105243, now seen corresponding path program 1 times [2021-12-15 09:47:47,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:47,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826972543] [2021-12-15 09:47:47,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:47,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7218 backedges. 822 proven. 819 refuted. 0 times theorem prover too weak. 5577 trivial. 0 not checked. [2021-12-15 09:47:48,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:48,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826972543] [2021-12-15 09:47:48,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826972543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:47:48,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100003799] [2021-12-15 09:47:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:48,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:47:48,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:47:48,235 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:47:48,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 09:47:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:48,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:47:48,558 INFO L286 TraceCheckSpWp]: Computing forward predicates...