./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label36.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem15_label36.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 f8c7f180e45ffba5eb47ee4dc238e0b48ee8dddec8c88fb0da95366e7d605cc2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:14:20,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:14:20,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:14:20,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:14:20,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:14:20,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:14:20,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:14:20,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:14:20,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:14:20,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:14:20,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:14:20,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:14:20,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:14:20,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:14:20,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:14:20,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:14:20,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:14:20,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:14:20,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:14:20,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:14:20,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:14:20,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:14:20,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:14:20,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:14:20,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:14:20,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:14:20,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:14:20,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:14:20,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:14:20,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:14:20,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:14:20,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:14:20,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:14:20,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:14:20,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:14:20,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:14:20,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:14:20,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:14:20,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:14:20,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:14:20,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:14:20,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:14:20,504 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:14:20,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:14:20,504 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:14:20,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:14:20,505 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:14:20,505 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:14:20,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:14:20,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:14:20,506 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:14:20,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:14:20,507 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:14:20,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:14:20,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:14:20,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:14:20,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:14:20,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:14:20,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:14:20,508 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:14:20,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:14:20,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:14:20,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:14:20,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:14:20,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:14:20,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:14:20,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:14:20,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:14:20,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:14:20,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:14:20,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:14:20,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:14:20,510 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:14:20,511 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:14:20,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:14:20,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:14:20,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8c7f180e45ffba5eb47ee4dc238e0b48ee8dddec8c88fb0da95366e7d605cc2 [2021-12-21 11:14:20,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:14:20,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:14:20,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:14:20,700 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:14:20,700 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:14:20,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label36.c [2021-12-21 11:14:20,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51cc68e88/84d6dc0262b2480dad213103027b6e7d/FLAG2293678c1 [2021-12-21 11:14:21,233 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:14:21,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label36.c [2021-12-21 11:14:21,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51cc68e88/84d6dc0262b2480dad213103027b6e7d/FLAG2293678c1 [2021-12-21 11:14:21,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51cc68e88/84d6dc0262b2480dad213103027b6e7d [2021-12-21 11:14:21,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:14:21,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:14:21,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:14:21,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:14:21,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:14:21,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:14:21" (1/1) ... [2021-12-21 11:14:21,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7691bd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:21, skipping insertion in model container [2021-12-21 11:14:21,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:14:21" (1/1) ... [2021-12-21 11:14:21,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:14:21,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:14:21,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label36.c[7434,7447] [2021-12-21 11:14:21,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:14:21,846 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:14:21,870 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label36.c[7434,7447] [2021-12-21 11:14:21,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:14:22,008 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:14:22,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:22 WrapperNode [2021-12-21 11:14:22,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:14:22,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:14:22,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:14:22,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:14:22,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:22" (1/1) ... [2021-12-21 11:14:22,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:22" (1/1) ... [2021-12-21 11:14:22,207 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-21 11:14:22,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:14:22,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:14:22,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:14:22,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:14:22,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:22" (1/1) ... [2021-12-21 11:14:22,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:22" (1/1) ... [2021-12-21 11:14:22,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:22" (1/1) ... [2021-12-21 11:14:22,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:22" (1/1) ... [2021-12-21 11:14:22,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:22" (1/1) ... [2021-12-21 11:14:22,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:22" (1/1) ... [2021-12-21 11:14:22,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:22" (1/1) ... [2021-12-21 11:14:22,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:14:22,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:14:22,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:14:22,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:14:22,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:22" (1/1) ... [2021-12-21 11:14:22,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:14:22,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:22,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:14:22,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:14:22,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:14:22,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:14:22,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:14:22,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:14:22,477 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:14:22,478 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:14:24,191 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:14:24,199 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:14:24,199 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:14:24,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:14:24 BoogieIcfgContainer [2021-12-21 11:14:24,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:14:24,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:14:24,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:14:24,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:14:24,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:14:21" (1/3) ... [2021-12-21 11:14:24,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141a9795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:14:24, skipping insertion in model container [2021-12-21 11:14:24,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:14:22" (2/3) ... [2021-12-21 11:14:24,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141a9795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:14:24, skipping insertion in model container [2021-12-21 11:14:24,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:14:24" (3/3) ... [2021-12-21 11:14:24,207 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label36.c [2021-12-21 11:14:24,210 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:14:24,210 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:14:24,242 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:14:24,246 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:14:24,246 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:14:24,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 11:14:24,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:24,280 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:24,280 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times [2021-12-21 11:14:24,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:24,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105296134] [2021-12-21 11:14:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:24,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:14:24,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:24,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105296134] [2021-12-21 11:14:24,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105296134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:24,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:24,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:14:24,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062475295] [2021-12-21 11:14:24,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:24,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:24,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:24,520 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:25,945 INFO L93 Difference]: Finished difference Result 1155 states and 2106 transitions. [2021-12-21 11:14:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:25,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 11:14:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:25,958 INFO L225 Difference]: With dead ends: 1155 [2021-12-21 11:14:25,958 INFO L226 Difference]: Without dead ends: 667 [2021-12-21 11:14:25,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:25,964 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 283 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:25,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 371 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:14:25,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-12-21 11:14:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 665. [2021-12-21 11:14:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.4789156626506024) internal successors, (982), 664 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 982 transitions. [2021-12-21 11:14:26,034 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 982 transitions. Word has length 61 [2021-12-21 11:14:26,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:26,038 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 982 transitions. [2021-12-21 11:14:26,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:26,038 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 982 transitions. [2021-12-21 11:14:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-21 11:14:26,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:26,043 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, 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] [2021-12-21 11:14:26,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:14:26,044 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:26,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:26,047 INFO L85 PathProgramCache]: Analyzing trace with hash -12161809, now seen corresponding path program 1 times [2021-12-21 11:14:26,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:26,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271029049] [2021-12-21 11:14:26,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:26,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:14:26,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:26,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271029049] [2021-12-21 11:14:26,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271029049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:26,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:26,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:14:26,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72349537] [2021-12-21 11:14:26,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:26,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:26,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:26,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:26,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:26,230 INFO L87 Difference]: Start difference. First operand 665 states and 982 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:27,923 INFO L93 Difference]: Finished difference Result 1955 states and 2894 transitions. [2021-12-21 11:14:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:27,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-21 11:14:27,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:27,927 INFO L225 Difference]: With dead ends: 1955 [2021-12-21 11:14:27,927 INFO L226 Difference]: Without dead ends: 1292 [2021-12-21 11:14:27,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:27,930 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 258 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:27,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 327 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:14:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-12-21 11:14:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1282. [2021-12-21 11:14:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.3989071038251366) internal successors, (1792), 1281 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1792 transitions. [2021-12-21 11:14:27,982 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1792 transitions. Word has length 136 [2021-12-21 11:14:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:27,983 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1792 transitions. [2021-12-21 11:14:27,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1792 transitions. [2021-12-21 11:14:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-21 11:14:27,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:27,987 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, 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] [2021-12-21 11:14:27,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:14:27,988 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:27,988 INFO L85 PathProgramCache]: Analyzing trace with hash 527052153, now seen corresponding path program 1 times [2021-12-21 11:14:27,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:27,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710800289] [2021-12-21 11:14:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:27,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:14:28,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710800289] [2021-12-21 11:14:28,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710800289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:28,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:28,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:14:28,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451600654] [2021-12-21 11:14:28,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:28,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:28,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:28,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:28,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:28,092 INFO L87 Difference]: Start difference. First operand 1282 states and 1792 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:29,613 INFO L93 Difference]: Finished difference Result 3764 states and 5263 transitions. [2021-12-21 11:14:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:29,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-12-21 11:14:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:29,621 INFO L225 Difference]: With dead ends: 3764 [2021-12-21 11:14:29,621 INFO L226 Difference]: Without dead ends: 2484 [2021-12-21 11:14:29,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:29,625 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 236 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:29,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 366 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:14:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-12-21 11:14:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2182. [2021-12-21 11:14:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 1.2815222375057314) internal successors, (2795), 2181 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 2795 transitions. [2021-12-21 11:14:29,685 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 2795 transitions. Word has length 140 [2021-12-21 11:14:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:29,686 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 2795 transitions. [2021-12-21 11:14:29,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 2795 transitions. [2021-12-21 11:14:29,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-21 11:14:29,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:29,690 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:29,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:14:29,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:29,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1978174500, now seen corresponding path program 1 times [2021-12-21 11:14:29,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:29,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807191926] [2021-12-21 11:14:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:29,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 11:14:29,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:29,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807191926] [2021-12-21 11:14:29,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807191926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:29,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:29,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:14:29,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201346592] [2021-12-21 11:14:29,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:29,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:29,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:29,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:29,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:29,838 INFO L87 Difference]: Start difference. First operand 2182 states and 2795 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 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) [2021-12-21 11:14:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:30,932 INFO L93 Difference]: Finished difference Result 6166 states and 7961 transitions. [2021-12-21 11:14:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:30,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 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 231 [2021-12-21 11:14:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:30,944 INFO L225 Difference]: With dead ends: 6166 [2021-12-21 11:14:30,945 INFO L226 Difference]: Without dead ends: 3986 [2021-12-21 11:14:30,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:30,952 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:30,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:14:30,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-12-21 11:14:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3682. [2021-12-21 11:14:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 1.2200488997555012) internal successors, (4491), 3681 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4491 transitions. [2021-12-21 11:14:31,006 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4491 transitions. Word has length 231 [2021-12-21 11:14:31,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:31,006 INFO L470 AbstractCegarLoop]: Abstraction has 3682 states and 4491 transitions. [2021-12-21 11:14:31,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 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) [2021-12-21 11:14:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4491 transitions. [2021-12-21 11:14:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-12-21 11:14:31,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:31,011 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:31,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:14:31,011 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:31,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1603270012, now seen corresponding path program 1 times [2021-12-21 11:14:31,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:31,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427041469] [2021-12-21 11:14:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:31,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 11:14:31,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:31,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427041469] [2021-12-21 11:14:31,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427041469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:31,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:31,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:14:31,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539983906] [2021-12-21 11:14:31,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:31,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:31,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:31,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:31,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:31,137 INFO L87 Difference]: Start difference. First operand 3682 states and 4491 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:32,480 INFO L93 Difference]: Finished difference Result 7661 states and 9291 transitions. [2021-12-21 11:14:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:32,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 333 [2021-12-21 11:14:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:32,489 INFO L225 Difference]: With dead ends: 7661 [2021-12-21 11:14:32,490 INFO L226 Difference]: Without dead ends: 3981 [2021-12-21 11:14:32,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:32,493 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:32,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:14:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2021-12-21 11:14:32,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3981. [2021-12-21 11:14:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3980 states have (on average 1.2050251256281408) internal successors, (4796), 3980 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 4796 transitions. [2021-12-21 11:14:32,535 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 4796 transitions. Word has length 333 [2021-12-21 11:14:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:32,536 INFO L470 AbstractCegarLoop]: Abstraction has 3981 states and 4796 transitions. [2021-12-21 11:14:32,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 4796 transitions. [2021-12-21 11:14:32,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-21 11:14:32,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:32,539 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:32,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:14:32,539 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:32,540 INFO L85 PathProgramCache]: Analyzing trace with hash -985073555, now seen corresponding path program 1 times [2021-12-21 11:14:32,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:32,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783407710] [2021-12-21 11:14:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:32,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 11:14:32,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:32,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783407710] [2021-12-21 11:14:32,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783407710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:32,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:32,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:32,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277811907] [2021-12-21 11:14:32,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:32,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:32,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:32,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:32,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:32,657 INFO L87 Difference]: Start difference. First operand 3981 states and 4796 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:33,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:33,953 INFO L93 Difference]: Finished difference Result 9465 states and 11674 transitions. [2021-12-21 11:14:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:33,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 348 [2021-12-21 11:14:33,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:33,968 INFO L225 Difference]: With dead ends: 9465 [2021-12-21 11:14:33,968 INFO L226 Difference]: Without dead ends: 5785 [2021-12-21 11:14:33,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:33,973 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 255 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:33,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 671 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:14:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5785 states. [2021-12-21 11:14:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5785 to 5783. [2021-12-21 11:14:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5782 states have (on average 1.1675890695261155) internal successors, (6751), 5782 states have internal predecessors, (6751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 6751 transitions. [2021-12-21 11:14:34,046 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 6751 transitions. Word has length 348 [2021-12-21 11:14:34,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:34,047 INFO L470 AbstractCegarLoop]: Abstraction has 5783 states and 6751 transitions. [2021-12-21 11:14:34,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 6751 transitions. [2021-12-21 11:14:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-12-21 11:14:34,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:34,051 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:34,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:14:34,052 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:34,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash -988421462, now seen corresponding path program 1 times [2021-12-21 11:14:34,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:34,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787680855] [2021-12-21 11:14:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:34,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-21 11:14:34,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:34,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787680855] [2021-12-21 11:14:34,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787680855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:34,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:34,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:34,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942952937] [2021-12-21 11:14:34,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:34,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:34,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:34,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:34,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:34,177 INFO L87 Difference]: Start difference. First operand 5783 states and 6751 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:35,450 INFO L93 Difference]: Finished difference Result 13364 states and 15910 transitions. [2021-12-21 11:14:35,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:35,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 407 [2021-12-21 11:14:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:35,467 INFO L225 Difference]: With dead ends: 13364 [2021-12-21 11:14:35,468 INFO L226 Difference]: Without dead ends: 7882 [2021-12-21 11:14:35,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:35,473 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 266 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:35,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 635 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:14:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7882 states. [2021-12-21 11:14:35,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7882 to 7284. [2021-12-21 11:14:35,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7284 states, 7283 states have (on average 1.148702457778388) internal successors, (8366), 7283 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7284 states to 7284 states and 8366 transitions. [2021-12-21 11:14:35,550 INFO L78 Accepts]: Start accepts. Automaton has 7284 states and 8366 transitions. Word has length 407 [2021-12-21 11:14:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:35,551 INFO L470 AbstractCegarLoop]: Abstraction has 7284 states and 8366 transitions. [2021-12-21 11:14:35,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 7284 states and 8366 transitions. [2021-12-21 11:14:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-12-21 11:14:35,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:35,556 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:35,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:14:35,556 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1305181093, now seen corresponding path program 1 times [2021-12-21 11:14:35,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:35,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110575996] [2021-12-21 11:14:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:35,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 11:14:35,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:35,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110575996] [2021-12-21 11:14:35,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110575996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:35,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:35,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:35,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297407438] [2021-12-21 11:14:35,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:35,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:35,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:35,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:35,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:35,768 INFO L87 Difference]: Start difference. First operand 7284 states and 8366 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:37,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:37,051 INFO L93 Difference]: Finished difference Result 16064 states and 18802 transitions. [2021-12-21 11:14:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:37,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 422 [2021-12-21 11:14:37,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:37,069 INFO L225 Difference]: With dead ends: 16064 [2021-12-21 11:14:37,069 INFO L226 Difference]: Without dead ends: 9081 [2021-12-21 11:14:37,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:37,077 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 330 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:37,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 156 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:14:37,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9081 states. [2021-12-21 11:14:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9081 to 9081. [2021-12-21 11:14:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9081 states, 9080 states have (on average 1.1708149779735684) internal successors, (10631), 9080 states have internal predecessors, (10631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9081 states to 9081 states and 10631 transitions. [2021-12-21 11:14:37,234 INFO L78 Accepts]: Start accepts. Automaton has 9081 states and 10631 transitions. Word has length 422 [2021-12-21 11:14:37,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:37,235 INFO L470 AbstractCegarLoop]: Abstraction has 9081 states and 10631 transitions. [2021-12-21 11:14:37,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 9081 states and 10631 transitions. [2021-12-21 11:14:37,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-12-21 11:14:37,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:37,243 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:37,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:14:37,244 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:37,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:37,244 INFO L85 PathProgramCache]: Analyzing trace with hash 244724408, now seen corresponding path program 1 times [2021-12-21 11:14:37,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:37,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507217444] [2021-12-21 11:14:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:37,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-12-21 11:14:37,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:37,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507217444] [2021-12-21 11:14:37,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507217444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:37,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:37,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:37,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566556643] [2021-12-21 11:14:37,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:37,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:37,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:37,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:37,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:37,404 INFO L87 Difference]: Start difference. First operand 9081 states and 10631 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 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) [2021-12-21 11:14:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:39,038 INFO L93 Difference]: Finished difference Result 22955 states and 26976 transitions. [2021-12-21 11:14:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 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 497 [2021-12-21 11:14:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:39,069 INFO L225 Difference]: With dead ends: 22955 [2021-12-21 11:14:39,069 INFO L226 Difference]: Without dead ends: 11484 [2021-12-21 11:14:39,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:39,078 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 281 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:39,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 680 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:14:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11484 states. [2021-12-21 11:14:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11484 to 11484. [2021-12-21 11:14:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 1.1284507532874684) internal successors, (12958), 11483 states have internal predecessors, (12958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 12958 transitions. [2021-12-21 11:14:39,289 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 12958 transitions. Word has length 497 [2021-12-21 11:14:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:39,290 INFO L470 AbstractCegarLoop]: Abstraction has 11484 states and 12958 transitions. [2021-12-21 11:14:39,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 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) [2021-12-21 11:14:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 12958 transitions. [2021-12-21 11:14:39,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-12-21 11:14:39,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:39,296 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, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:39,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:14:39,296 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:39,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:39,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1693739582, now seen corresponding path program 1 times [2021-12-21 11:14:39,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:39,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300865802] [2021-12-21 11:14:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:39,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 266 proven. 79 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 11:14:39,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:39,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300865802] [2021-12-21 11:14:39,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300865802] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:14:39,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789272422] [2021-12-21 11:14:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:39,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:39,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:39,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:14:39,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:14:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:39,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:14:39,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:14:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-21 11:14:40,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:14:40,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789272422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:40,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:14:40,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-21 11:14:40,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510501219] [2021-12-21 11:14:40,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:40,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:40,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:40,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:40,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:14:40,430 INFO L87 Difference]: Start difference. First operand 11484 states and 12958 transitions. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:41,885 INFO L93 Difference]: Finished difference Result 25656 states and 29285 transitions. [2021-12-21 11:14:41,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:41,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 500 [2021-12-21 11:14:41,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:41,904 INFO L225 Difference]: With dead ends: 25656 [2021-12-21 11:14:41,904 INFO L226 Difference]: Without dead ends: 14473 [2021-12-21 11:14:41,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:14:41,913 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 361 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:41,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 451 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:14:41,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14473 states. [2021-12-21 11:14:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14473 to 14174. [2021-12-21 11:14:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14174 states, 14173 states have (on average 1.1343399421435123) internal successors, (16077), 14173 states have internal predecessors, (16077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14174 states to 14174 states and 16077 transitions. [2021-12-21 11:14:42,047 INFO L78 Accepts]: Start accepts. Automaton has 14174 states and 16077 transitions. Word has length 500 [2021-12-21 11:14:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:42,048 INFO L470 AbstractCegarLoop]: Abstraction has 14174 states and 16077 transitions. [2021-12-21 11:14:42,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 14174 states and 16077 transitions. [2021-12-21 11:14:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-12-21 11:14:42,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:42,054 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:42,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:14:42,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 11:14:42,268 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:42,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:42,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1820911888, now seen corresponding path program 1 times [2021-12-21 11:14:42,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:42,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058594185] [2021-12-21 11:14:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:42,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 278 proven. 79 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 11:14:42,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:42,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058594185] [2021-12-21 11:14:42,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058594185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:14:42,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983035554] [2021-12-21 11:14:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:42,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:42,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:42,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:14:42,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:14:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:42,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:14:42,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:14:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-12-21 11:14:43,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:14:43,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983035554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:43,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:14:43,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-21 11:14:43,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798760456] [2021-12-21 11:14:43,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:43,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:43,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:43,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:43,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:14:43,301 INFO L87 Difference]: Start difference. First operand 14174 states and 16077 transitions. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:44,524 INFO L93 Difference]: Finished difference Result 32829 states and 37445 transitions. [2021-12-21 11:14:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:44,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 507 [2021-12-21 11:14:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:44,547 INFO L225 Difference]: With dead ends: 32829 [2021-12-21 11:14:44,547 INFO L226 Difference]: Without dead ends: 16564 [2021-12-21 11:14:44,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:14:44,562 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 261 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:44,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 609 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:14:44,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16564 states. [2021-12-21 11:14:44,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16564 to 13862. [2021-12-21 11:14:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13862 states, 13861 states have (on average 1.1118245436837169) internal successors, (15411), 13861 states have internal predecessors, (15411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13862 states to 13862 states and 15411 transitions. [2021-12-21 11:14:44,724 INFO L78 Accepts]: Start accepts. Automaton has 13862 states and 15411 transitions. Word has length 507 [2021-12-21 11:14:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:44,724 INFO L470 AbstractCegarLoop]: Abstraction has 13862 states and 15411 transitions. [2021-12-21 11:14:44,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 13862 states and 15411 transitions. [2021-12-21 11:14:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2021-12-21 11:14:44,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:44,733 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:44,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 11:14:44,950 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,SelfDestructingSolverStorable10 [2021-12-21 11:14:44,951 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:44,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:44,951 INFO L85 PathProgramCache]: Analyzing trace with hash -149450233, now seen corresponding path program 1 times [2021-12-21 11:14:44,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:44,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101211671] [2021-12-21 11:14:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:44,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 370 proven. 79 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 11:14:45,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:45,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101211671] [2021-12-21 11:14:45,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101211671] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:14:45,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84170735] [2021-12-21 11:14:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:45,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:45,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:45,180 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:14:45,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:14:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:45,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:14:45,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:14:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-12-21 11:14:46,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:14:46,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84170735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:46,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:14:46,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-21 11:14:46,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792595879] [2021-12-21 11:14:46,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:46,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:46,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:14:46,155 INFO L87 Difference]: Start difference. First operand 13862 states and 15411 transitions. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:47,240 INFO L93 Difference]: Finished difference Result 31305 states and 35103 transitions. [2021-12-21 11:14:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:47,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 599 [2021-12-21 11:14:47,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:47,260 INFO L225 Difference]: With dead ends: 31305 [2021-12-21 11:14:47,260 INFO L226 Difference]: Without dead ends: 17744 [2021-12-21 11:14:47,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:14:47,270 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 279 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:47,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 239 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:14:47,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17744 states. [2021-12-21 11:14:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17744 to 14451. [2021-12-21 11:14:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14451 states, 14450 states have (on average 1.1170934256055363) internal successors, (16142), 14450 states have internal predecessors, (16142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14451 states to 14451 states and 16142 transitions. [2021-12-21 11:14:47,459 INFO L78 Accepts]: Start accepts. Automaton has 14451 states and 16142 transitions. Word has length 599 [2021-12-21 11:14:47,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:47,460 INFO L470 AbstractCegarLoop]: Abstraction has 14451 states and 16142 transitions. [2021-12-21 11:14:47,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 14451 states and 16142 transitions. [2021-12-21 11:14:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2021-12-21 11:14:47,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:47,471 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:47,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 11:14:47,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:47,698 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:47,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1374981731, now seen corresponding path program 1 times [2021-12-21 11:14:47,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:47,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535566616] [2021-12-21 11:14:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:47,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 390 proven. 79 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 11:14:47,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:47,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535566616] [2021-12-21 11:14:47,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535566616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:14:47,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424597578] [2021-12-21 11:14:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:47,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:47,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:47,937 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:14:47,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 11:14:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:48,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:14:48,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:14:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 469 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 11:14:48,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:14:48,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424597578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:48,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:14:48,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-21 11:14:48,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221394564] [2021-12-21 11:14:48,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:48,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:48,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:48,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:48,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:14:48,827 INFO L87 Difference]: Start difference. First operand 14451 states and 16142 transitions. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:49,783 INFO L93 Difference]: Finished difference Result 28602 states and 31984 transitions. [2021-12-21 11:14:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:49,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 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 621 [2021-12-21 11:14:49,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:49,800 INFO L225 Difference]: With dead ends: 28602 [2021-12-21 11:14:49,800 INFO L226 Difference]: Without dead ends: 14452 [2021-12-21 11:14:49,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 620 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:14:49,809 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 259 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:49,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 236 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 11:14:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14452 states. [2021-12-21 11:14:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14452 to 14150. [2021-12-21 11:14:49,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14150 states, 14149 states have (on average 1.101703300586614) internal successors, (15588), 14149 states have internal predecessors, (15588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14150 states to 14150 states and 15588 transitions. [2021-12-21 11:14:49,929 INFO L78 Accepts]: Start accepts. Automaton has 14150 states and 15588 transitions. Word has length 621 [2021-12-21 11:14:49,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:49,929 INFO L470 AbstractCegarLoop]: Abstraction has 14150 states and 15588 transitions. [2021-12-21 11:14:49,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 14150 states and 15588 transitions. [2021-12-21 11:14:49,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2021-12-21 11:14:49,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:49,937 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:14:49,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 11:14:50,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:50,151 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:50,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1143050440, now seen corresponding path program 1 times [2021-12-21 11:14:50,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:50,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028003576] [2021-12-21 11:14:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:50,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-12-21 11:14:50,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:50,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028003576] [2021-12-21 11:14:50,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028003576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:50,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:50,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:50,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767845353] [2021-12-21 11:14:50,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:50,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:50,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:50,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:50,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:50,436 INFO L87 Difference]: Start difference. First operand 14150 states and 15588 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 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) [2021-12-21 11:14:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:51,920 INFO L93 Difference]: Finished difference Result 33699 states and 37301 transitions. [2021-12-21 11:14:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:51,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 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 657 [2021-12-21 11:14:51,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:51,939 INFO L225 Difference]: With dead ends: 33699 [2021-12-21 11:14:51,939 INFO L226 Difference]: Without dead ends: 19850 [2021-12-21 11:14:51,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:51,950 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 269 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:51,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 596 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:14:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19850 states. [2021-12-21 11:14:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19850 to 18639. [2021-12-21 11:14:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18639 states, 18638 states have (on average 1.1045713059341131) internal successors, (20587), 18638 states have internal predecessors, (20587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18639 states to 18639 states and 20587 transitions. [2021-12-21 11:14:52,148 INFO L78 Accepts]: Start accepts. Automaton has 18639 states and 20587 transitions. Word has length 657 [2021-12-21 11:14:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:52,149 INFO L470 AbstractCegarLoop]: Abstraction has 18639 states and 20587 transitions. [2021-12-21 11:14:52,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 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) [2021-12-21 11:14:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 18639 states and 20587 transitions. [2021-12-21 11:14:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2021-12-21 11:14:52,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:52,159 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:14:52,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 11:14:52,159 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:52,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1492551500, now seen corresponding path program 1 times [2021-12-21 11:14:52,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:52,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625566083] [2021-12-21 11:14:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:52,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 528 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-21 11:14:52,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:52,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625566083] [2021-12-21 11:14:52,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625566083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:52,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:52,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:52,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37963172] [2021-12-21 11:14:52,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:52,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:52,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:52,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:52,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:52,331 INFO L87 Difference]: Start difference. First operand 18639 states and 20587 transitions. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:53,635 INFO L93 Difference]: Finished difference Result 42066 states and 46473 transitions. [2021-12-21 11:14:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:53,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 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 686 [2021-12-21 11:14:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:53,655 INFO L225 Difference]: With dead ends: 42066 [2021-12-21 11:14:53,655 INFO L226 Difference]: Without dead ends: 21635 [2021-12-21 11:14:53,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:53,669 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 92 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:53,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 543 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:14:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21635 states. [2021-12-21 11:14:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21635 to 20736. [2021-12-21 11:14:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20736 states, 20735 states have (on average 1.095828309621413) internal successors, (22722), 20735 states have internal predecessors, (22722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20736 states to 20736 states and 22722 transitions. [2021-12-21 11:14:53,875 INFO L78 Accepts]: Start accepts. Automaton has 20736 states and 22722 transitions. Word has length 686 [2021-12-21 11:14:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:53,876 INFO L470 AbstractCegarLoop]: Abstraction has 20736 states and 22722 transitions. [2021-12-21 11:14:53,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 20736 states and 22722 transitions. [2021-12-21 11:14:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2021-12-21 11:14:53,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:53,890 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:14:53,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 11:14:53,890 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:53,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:53,891 INFO L85 PathProgramCache]: Analyzing trace with hash -260936919, now seen corresponding path program 1 times [2021-12-21 11:14:53,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:53,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848380231] [2021-12-21 11:14:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:53,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 427 proven. 444 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-21 11:14:54,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:54,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848380231] [2021-12-21 11:14:54,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848380231] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:14:54,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783148354] [2021-12-21 11:14:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:54,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:54,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:54,190 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:14:54,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 11:14:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:54,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:14:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:14:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 681 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-21 11:14:55,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:14:55,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783148354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:55,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:14:55,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 11:14:55,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825908609] [2021-12-21 11:14:55,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:55,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:55,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:55,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:14:55,351 INFO L87 Difference]: Start difference. First operand 20736 states and 22722 transitions. Second operand has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:56,375 INFO L93 Difference]: Finished difference Result 40875 states and 44840 transitions. [2021-12-21 11:14:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:56,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 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 780 [2021-12-21 11:14:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:56,396 INFO L225 Difference]: With dead ends: 40875 [2021-12-21 11:14:56,396 INFO L226 Difference]: Without dead ends: 20440 [2021-12-21 11:14:56,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 780 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:14:56,410 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 127 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:56,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 408 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 11:14:56,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20440 states. [2021-12-21 11:14:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20440 to 20434. [2021-12-21 11:14:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20434 states, 20433 states have (on average 1.0852542455831253) internal successors, (22175), 20433 states have internal predecessors, (22175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:56,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20434 states to 20434 states and 22175 transitions. [2021-12-21 11:14:56,641 INFO L78 Accepts]: Start accepts. Automaton has 20434 states and 22175 transitions. Word has length 780 [2021-12-21 11:14:56,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:56,642 INFO L470 AbstractCegarLoop]: Abstraction has 20434 states and 22175 transitions. [2021-12-21 11:14:56,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:56,642 INFO L276 IsEmpty]: Start isEmpty. Operand 20434 states and 22175 transitions. [2021-12-21 11:14:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2021-12-21 11:14:56,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:56,657 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:14:56,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 11:14:56,869 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,SelfDestructingSolverStorable15 [2021-12-21 11:14:56,870 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1105372660, now seen corresponding path program 1 times [2021-12-21 11:14:56,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:56,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222532007] [2021-12-21 11:14:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:56,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 592 proven. 0 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2021-12-21 11:14:57,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:57,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222532007] [2021-12-21 11:14:57,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222532007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:14:57,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:14:57,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:14:57,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138093057] [2021-12-21 11:14:57,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:14:57,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:14:57,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:14:57,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:14:57,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:57,083 INFO L87 Difference]: Start difference. First operand 20434 states and 22175 transitions. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:14:58,479 INFO L93 Difference]: Finished difference Result 44449 states and 48266 transitions. [2021-12-21 11:14:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:14:58,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 846 [2021-12-21 11:14:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:14:58,501 INFO L225 Difference]: With dead ends: 44449 [2021-12-21 11:14:58,502 INFO L226 Difference]: Without dead ends: 23120 [2021-12-21 11:14:58,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:14:58,507 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 318 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:14:58,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 553 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:14:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23120 states. [2021-12-21 11:14:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23120 to 21322. [2021-12-21 11:14:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21322 states, 21321 states have (on average 1.075512405609493) internal successors, (22931), 21321 states have internal predecessors, (22931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21322 states to 21322 states and 22931 transitions. [2021-12-21 11:14:58,698 INFO L78 Accepts]: Start accepts. Automaton has 21322 states and 22931 transitions. Word has length 846 [2021-12-21 11:14:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:14:58,698 INFO L470 AbstractCegarLoop]: Abstraction has 21322 states and 22931 transitions. [2021-12-21 11:14:58,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:14:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 21322 states and 22931 transitions. [2021-12-21 11:14:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2021-12-21 11:14:58,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:14:58,713 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:14:58,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 11:14:58,714 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:14:58,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:14:58,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1187839850, now seen corresponding path program 1 times [2021-12-21 11:14:58,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:14:58,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147994795] [2021-12-21 11:14:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:58,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:14:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 637 proven. 269 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-12-21 11:14:59,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:14:59,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147994795] [2021-12-21 11:14:59,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147994795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:14:59,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320132472] [2021-12-21 11:14:59,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:14:59,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:14:59,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:14:59,064 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) [2021-12-21 11:14:59,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 11:14:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:14:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 11:14:59,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:15:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2021-12-21 11:15:00,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:15:00,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320132472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:15:00,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:15:00,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 11:15:00,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515819321] [2021-12-21 11:15:00,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:15:00,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:15:00,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:15:00,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:15:00,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:15:00,241 INFO L87 Difference]: Start difference. First operand 21322 states and 22931 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:15:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:15:01,505 INFO L93 Difference]: Finished difference Result 47748 states and 51294 transitions. [2021-12-21 11:15:01,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:15:01,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 867 [2021-12-21 11:15:01,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:15:01,546 INFO L225 Difference]: With dead ends: 47748 [2021-12-21 11:15:01,547 INFO L226 Difference]: Without dead ends: 26727 [2021-12-21 11:15:01,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 866 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:15:01,561 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:15:01,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 536 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:15:01,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26727 states. [2021-12-21 11:15:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26727 to 23724. [2021-12-21 11:15:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23724 states, 23723 states have (on average 1.0712388820975425) internal successors, (25413), 23723 states have internal predecessors, (25413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:15:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23724 states to 23724 states and 25413 transitions. [2021-12-21 11:15:01,893 INFO L78 Accepts]: Start accepts. Automaton has 23724 states and 25413 transitions. Word has length 867 [2021-12-21 11:15:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:15:01,894 INFO L470 AbstractCegarLoop]: Abstraction has 23724 states and 25413 transitions. [2021-12-21 11:15:01,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:15:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 23724 states and 25413 transitions. [2021-12-21 11:15:01,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2021-12-21 11:15:01,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:15:01,908 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:15:01,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-21 11:15:02,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 11:15:02,124 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:15:02,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:15:02,125 INFO L85 PathProgramCache]: Analyzing trace with hash -568589825, now seen corresponding path program 1 times [2021-12-21 11:15:02,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:15:02,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231382871] [2021-12-21 11:15:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:15:02,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:15:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:15:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 859 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2021-12-21 11:15:02,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:15:02,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231382871] [2021-12-21 11:15:02,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231382871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:15:02,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:15:02,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:15:02,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531039012] [2021-12-21 11:15:02,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:15:02,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:15:02,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:15:02,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:15:02,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:15:02,399 INFO L87 Difference]: Start difference. First operand 23724 states and 25413 transitions. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:15:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:15:03,709 INFO L93 Difference]: Finished difference Result 51052 states and 54577 transitions. [2021-12-21 11:15:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:15:03,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 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 900 [2021-12-21 11:15:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:15:03,739 INFO L225 Difference]: With dead ends: 51052 [2021-12-21 11:15:03,740 INFO L226 Difference]: Without dead ends: 27330 [2021-12-21 11:15:03,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:15:03,755 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 147 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:15:03,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 531 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:15:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27330 states. [2021-12-21 11:15:04,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27330 to 22823. [2021-12-21 11:15:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22823 states, 22822 states have (on average 1.0721233897116818) internal successors, (24468), 22822 states have internal predecessors, (24468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:15:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22823 states to 22823 states and 24468 transitions. [2021-12-21 11:15:04,047 INFO L78 Accepts]: Start accepts. Automaton has 22823 states and 24468 transitions. Word has length 900 [2021-12-21 11:15:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:15:04,048 INFO L470 AbstractCegarLoop]: Abstraction has 22823 states and 24468 transitions. [2021-12-21 11:15:04,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:15:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 22823 states and 24468 transitions. [2021-12-21 11:15:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 905 [2021-12-21 11:15:04,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:15:04,079 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:15:04,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 11:15:04,080 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:15:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:15:04,080 INFO L85 PathProgramCache]: Analyzing trace with hash 629237515, now seen corresponding path program 1 times [2021-12-21 11:15:04,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:15:04,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239285237] [2021-12-21 11:15:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:15:04,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:15:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:15:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 711 proven. 269 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-12-21 11:15:04,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:15:04,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239285237] [2021-12-21 11:15:04,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239285237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:15:04,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424020781] [2021-12-21 11:15:04,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:15:04,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:15:04,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:15:04,728 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) [2021-12-21 11:15:04,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 11:15:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:15:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 11:15:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:15:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2021-12-21 11:15:19,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:15:19,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424020781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:15:19,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:15:19,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 11:15:19,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233626136] [2021-12-21 11:15:19,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:15:19,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:15:19,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:15:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:15:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:15:19,246 INFO L87 Difference]: Start difference. First operand 22823 states and 24468 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:15:19,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:15:19,305 INFO L93 Difference]: Finished difference Result 23730 states and 25415 transitions. [2021-12-21 11:15:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:15:19,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 904 [2021-12-21 11:15:19,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:15:19,328 INFO L225 Difference]: With dead ends: 23730 [2021-12-21 11:15:19,328 INFO L226 Difference]: Without dead ends: 23728 [2021-12-21 11:15:19,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 903 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:15:19,335 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 251 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 879 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:15:19,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 581 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 879 Unchecked, 0.0s Time] [2021-12-21 11:15:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23728 states. [2021-12-21 11:15:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23728 to 22524. [2021-12-21 11:15:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22524 states, 22523 states have (on average 1.0718376770412468) internal successors, (24141), 22523 states have internal predecessors, (24141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:15:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22524 states to 22524 states and 24141 transitions. [2021-12-21 11:15:19,528 INFO L78 Accepts]: Start accepts. Automaton has 22524 states and 24141 transitions. Word has length 904 [2021-12-21 11:15:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:15:19,529 INFO L470 AbstractCegarLoop]: Abstraction has 22524 states and 24141 transitions. [2021-12-21 11:15:19,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:15:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 22524 states and 24141 transitions. [2021-12-21 11:15:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1026 [2021-12-21 11:15:19,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:15:19,546 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:15:19,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 11:15:19,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:15:19,763 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:15:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:15:19,764 INFO L85 PathProgramCache]: Analyzing trace with hash -849008212, now seen corresponding path program 1 times [2021-12-21 11:15:19,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:15:19,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387749439] [2021-12-21 11:15:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:15:19,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:15:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:15:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1775 backedges. 1281 proven. 90 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2021-12-21 11:15:20,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:15:20,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387749439] [2021-12-21 11:15:20,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387749439] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:15:20,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541203194] [2021-12-21 11:15:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:15:20,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:15:20,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:15:20,096 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) [2021-12-21 11:15:20,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 11:15:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:15:20,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 11:15:20,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:15:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1775 backedges. 1188 proven. 399 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-21 11:15:21,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:15:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1775 backedges. 933 proven. 0 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2021-12-21 11:15:22,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541203194] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 11:15:22,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 11:15:22,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 6] total 10 [2021-12-21 11:15:22,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973230454] [2021-12-21 11:15:22,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:15:22,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:15:22,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:15:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:15:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 11:15:22,961 INFO L87 Difference]: Start difference. First operand 22524 states and 24141 transitions. Second operand has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)