./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem11_label23.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/Problem11_label23.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 f869ff34b8d1fc9233da1bce651f8bc007d942cb0a36d4a975409aebb2d888b1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:58:38,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:58:38,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:58:38,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:58:38,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:58:38,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:58:38,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:58:38,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:58:38,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:58:38,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:58:38,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:58:38,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:58:38,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:58:38,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:58:38,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:58:38,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:58:38,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:58:38,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:58:38,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:58:38,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:58:38,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:58:38,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:58:38,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:58:38,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:58:38,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:58:38,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:58:38,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:58:38,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:58:38,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:58:38,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:58:38,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:58:38,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:58:38,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:58:38,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:58:38,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:58:38,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:58:38,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:58:38,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:58:38,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:58:38,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:58:38,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:58:38,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:58:38,485 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:58:38,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:58:38,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:58:38,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:58:38,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:58:38,489 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:58:38,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:58:38,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:58:38,490 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:58:38,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:58:38,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:58:38,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:58:38,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:58:38,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:58:38,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:58:38,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:58:38,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:58:38,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:58:38,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:58:38,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:58:38,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:58:38,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:58:38,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:58:38,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:58:38,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:58:38,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:58:38,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:58:38,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:58:38,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:58:38,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:58:38,495 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:58:38,495 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:58:38,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:58:38,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:58:38,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f869ff34b8d1fc9233da1bce651f8bc007d942cb0a36d4a975409aebb2d888b1 [2021-12-21 10:58:38,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:58:38,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:58:38,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:58:38,700 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:58:38,700 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:58:38,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label23.c [2021-12-21 10:58:38,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6686592c/62afeb088bc14cfa8c1a7e4d75bd018b/FLAG04ea75c06 [2021-12-21 10:58:39,136 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:58:39,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label23.c [2021-12-21 10:58:39,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6686592c/62afeb088bc14cfa8c1a7e4d75bd018b/FLAG04ea75c06 [2021-12-21 10:58:39,498 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6686592c/62afeb088bc14cfa8c1a7e4d75bd018b [2021-12-21 10:58:39,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:58:39,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:58:39,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:58:39,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:58:39,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:58:39,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:58:39" (1/1) ... [2021-12-21 10:58:39,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a3a44d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39, skipping insertion in model container [2021-12-21 10:58:39,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:58:39" (1/1) ... [2021-12-21 10:58:39,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:58:39,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:58:39,750 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/Problem11_label23.c[9364,9377] [2021-12-21 10:58:39,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:58:39,887 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:58:39,904 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/Problem11_label23.c[9364,9377] [2021-12-21 10:58:39,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:58:39,976 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:58:39,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39 WrapperNode [2021-12-21 10:58:39,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:58:39,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:58:39,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:58:39,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:58:39,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39" (1/1) ... [2021-12-21 10:58:40,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39" (1/1) ... [2021-12-21 10:58:40,079 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-12-21 10:58:40,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:58:40,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:58:40,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:58:40,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:58:40,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39" (1/1) ... [2021-12-21 10:58:40,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39" (1/1) ... [2021-12-21 10:58:40,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39" (1/1) ... [2021-12-21 10:58:40,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39" (1/1) ... [2021-12-21 10:58:40,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39" (1/1) ... [2021-12-21 10:58:40,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39" (1/1) ... [2021-12-21 10:58:40,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39" (1/1) ... [2021-12-21 10:58:40,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:58:40,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:58:40,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:58:40,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:58:40,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39" (1/1) ... [2021-12-21 10:58:40,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:58:40,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:40,196 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 10:58:40,212 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 10:58:40,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:58:40,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:58:40,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:58:40,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:58:40,266 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:58:40,267 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:58:41,508 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:58:41,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:58:41,530 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:58:41,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:58:41 BoogieIcfgContainer [2021-12-21 10:58:41,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:58:41,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:58:41,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:58:41,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:58:41,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:58:39" (1/3) ... [2021-12-21 10:58:41,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49132c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:58:41, skipping insertion in model container [2021-12-21 10:58:41,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:39" (2/3) ... [2021-12-21 10:58:41,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49132c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:58:41, skipping insertion in model container [2021-12-21 10:58:41,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:58:41" (3/3) ... [2021-12-21 10:58:41,542 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label23.c [2021-12-21 10:58:41,546 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:58:41,546 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:58:41,581 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:58:41,588 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 10:58:41,588 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:58:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 10:58:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 10:58:41,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:41,617 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, 1, 1, 1, 1] [2021-12-21 10:58:41,618 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:41,624 INFO L85 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2021-12-21 10:58:41,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:41,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752360406] [2021-12-21 10:58:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:41,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:41,895 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 10:58:41,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:41,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752360406] [2021-12-21 10:58:41,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752360406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:41,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:41,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:41,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307820290] [2021-12-21 10:58:41,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:41,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:41,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:41,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:41,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:41,918 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 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 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:42,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:42,727 INFO L93 Difference]: Finished difference Result 769 states and 1360 transitions. [2021-12-21 10:58:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:42,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-21 10:58:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:42,746 INFO L225 Difference]: With dead ends: 769 [2021-12-21 10:58:42,746 INFO L226 Difference]: Without dead ends: 422 [2021-12-21 10:58:42,752 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 10:58:42,756 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 175 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:42,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 163 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-21 10:58:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2021-12-21 10:58:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.5231143552311435) internal successors, (626), 411 states have internal predecessors, (626), 0 states have call successors, (0), 0 states 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 10:58:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 626 transitions. [2021-12-21 10:58:42,810 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 626 transitions. Word has length 65 [2021-12-21 10:58:42,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:42,810 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 626 transitions. [2021-12-21 10:58:42,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 626 transitions. [2021-12-21 10:58:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-21 10:58:42,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:42,814 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:42,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:58:42,814 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:42,815 INFO L85 PathProgramCache]: Analyzing trace with hash -566112933, now seen corresponding path program 1 times [2021-12-21 10:58:42,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:42,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433496418] [2021-12-21 10:58:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:42,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:42,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:42,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433496418] [2021-12-21 10:58:42,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433496418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:42,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:42,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:42,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910936595] [2021-12-21 10:58:42,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:42,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:42,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:42,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:42,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:42,896 INFO L87 Difference]: Start difference. First operand 412 states and 626 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:43,472 INFO L93 Difference]: Finished difference Result 1194 states and 1821 transitions. [2021-12-21 10:58:43,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:43,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-12-21 10:58:43,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:43,476 INFO L225 Difference]: With dead ends: 1194 [2021-12-21 10:58:43,476 INFO L226 Difference]: Without dead ends: 784 [2021-12-21 10:58:43,480 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 10:58:43,482 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 175 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:43,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 154 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-21 10:58:43,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2021-12-21 10:58:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.3742017879948913) internal successors, (1076), 783 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states 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 10:58:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1076 transitions. [2021-12-21 10:58:43,511 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1076 transitions. Word has length 131 [2021-12-21 10:58:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:43,514 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 1076 transitions. [2021-12-21 10:58:43,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1076 transitions. [2021-12-21 10:58:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 10:58:43,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:43,525 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:43,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:58:43,526 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:43,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1935044965, now seen corresponding path program 1 times [2021-12-21 10:58:43,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:43,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872307894] [2021-12-21 10:58:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:43,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:43,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:43,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872307894] [2021-12-21 10:58:43,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872307894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:43,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:43,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:43,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634592355] [2021-12-21 10:58:43,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:43,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:43,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:43,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:43,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:43,665 INFO L87 Difference]: Start difference. First operand 784 states and 1076 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:44,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:44,260 INFO L93 Difference]: Finished difference Result 1936 states and 2599 transitions. [2021-12-21 10:58:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:44,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-21 10:58:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:44,264 INFO L225 Difference]: With dead ends: 1936 [2021-12-21 10:58:44,265 INFO L226 Difference]: Without dead ends: 1154 [2021-12-21 10:58:44,266 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 10:58:44,271 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 119 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:44,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 190 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:44,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-12-21 10:58:44,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1153. [2021-12-21 10:58:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.2699652777777777) internal successors, (1463), 1152 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states 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 10:58:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1463 transitions. [2021-12-21 10:58:44,287 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1463 transitions. Word has length 135 [2021-12-21 10:58:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:44,287 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1463 transitions. [2021-12-21 10:58:44,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1463 transitions. [2021-12-21 10:58:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-21 10:58:44,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:44,290 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:44,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:58:44,290 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:44,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:44,291 INFO L85 PathProgramCache]: Analyzing trace with hash -444441444, now seen corresponding path program 1 times [2021-12-21 10:58:44,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:44,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335040536] [2021-12-21 10:58:44,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:44,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:44,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:44,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335040536] [2021-12-21 10:58:44,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335040536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:44,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:44,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:44,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798576929] [2021-12-21 10:58:44,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:44,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:44,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:44,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:44,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:44,383 INFO L87 Difference]: Start difference. First operand 1153 states and 1463 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 10:58:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:44,971 INFO L93 Difference]: Finished difference Result 2679 states and 3481 transitions. [2021-12-21 10:58:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:44,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 177 [2021-12-21 10:58:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:44,976 INFO L225 Difference]: With dead ends: 2679 [2021-12-21 10:58:44,976 INFO L226 Difference]: Without dead ends: 1712 [2021-12-21 10:58:44,977 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 10:58:44,978 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 141 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:44,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 332 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-12-21 10:58:44,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1521. [2021-12-21 10:58:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 1.255921052631579) internal successors, (1909), 1520 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states 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 10:58:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1909 transitions. [2021-12-21 10:58:44,997 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 1909 transitions. Word has length 177 [2021-12-21 10:58:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:44,998 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 1909 transitions. [2021-12-21 10:58:44,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 10:58:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 1909 transitions. [2021-12-21 10:58:45,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-21 10:58:45,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:45,000 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, 3, 3, 3, 3, 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] [2021-12-21 10:58:45,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:58:45,001 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:45,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:45,001 INFO L85 PathProgramCache]: Analyzing trace with hash 522290920, now seen corresponding path program 1 times [2021-12-21 10:58:45,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:45,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118003080] [2021-12-21 10:58:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:45,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-21 10:58:45,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:45,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118003080] [2021-12-21 10:58:45,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118003080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:45,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:45,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:45,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743926429] [2021-12-21 10:58:45,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:45,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:45,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:45,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:45,099 INFO L87 Difference]: Start difference. First operand 1521 states and 1909 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 10:58:45,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:45,714 INFO L93 Difference]: Finished difference Result 3597 states and 4559 transitions. [2021-12-21 10:58:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:45,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 247 [2021-12-21 10:58:45,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:45,720 INFO L225 Difference]: With dead ends: 3597 [2021-12-21 10:58:45,720 INFO L226 Difference]: Without dead ends: 2078 [2021-12-21 10:58:45,722 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 10:58:45,722 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 132 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:45,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 391 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-12-21 10:58:45,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1889. [2021-12-21 10:58:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 1.2473516949152543) internal successors, (2355), 1888 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states 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 10:58:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2355 transitions. [2021-12-21 10:58:45,757 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2355 transitions. Word has length 247 [2021-12-21 10:58:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:45,758 INFO L470 AbstractCegarLoop]: Abstraction has 1889 states and 2355 transitions. [2021-12-21 10:58:45,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 10:58:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2355 transitions. [2021-12-21 10:58:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-12-21 10:58:45,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:45,761 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:45,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:58:45,761 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:45,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1609653245, now seen corresponding path program 1 times [2021-12-21 10:58:45,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:45,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085924007] [2021-12-21 10:58:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:45,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:45,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:45,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085924007] [2021-12-21 10:58:45,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085924007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:45,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:45,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:45,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764496256] [2021-12-21 10:58:45,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:45,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:45,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:45,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:45,844 INFO L87 Difference]: Start difference. First operand 1889 states and 2355 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 10:58:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:46,428 INFO L93 Difference]: Finished difference Result 5075 states and 6326 transitions. [2021-12-21 10:58:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:46,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 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 274 [2021-12-21 10:58:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:46,436 INFO L225 Difference]: With dead ends: 5075 [2021-12-21 10:58:46,436 INFO L226 Difference]: Without dead ends: 3188 [2021-12-21 10:58:46,438 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 10:58:46,438 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:46,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 140 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3188 states. [2021-12-21 10:58:46,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3188 to 3186. [2021-12-21 10:58:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 1.2160125588697017) internal successors, (3873), 3185 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states 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 10:58:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3873 transitions. [2021-12-21 10:58:46,481 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3873 transitions. Word has length 274 [2021-12-21 10:58:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:46,482 INFO L470 AbstractCegarLoop]: Abstraction has 3186 states and 3873 transitions. [2021-12-21 10:58:46,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 10:58:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3873 transitions. [2021-12-21 10:58:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-21 10:58:46,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:46,485 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:58:46,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 10:58:46,486 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:46,486 INFO L85 PathProgramCache]: Analyzing trace with hash 328502846, now seen corresponding path program 1 times [2021-12-21 10:58:46,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:46,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747894310] [2021-12-21 10:58:46,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:46,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:46,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:46,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747894310] [2021-12-21 10:58:46,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747894310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:46,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:46,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:46,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455939610] [2021-12-21 10:58:46,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:46,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:46,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:46,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:46,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:46,634 INFO L87 Difference]: Start difference. First operand 3186 states and 3873 transitions. Second operand has 4 states, 4 states have (on average 70.0) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 10:58:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:47,629 INFO L93 Difference]: Finished difference Result 10433 states and 12706 transitions. [2021-12-21 10:58:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 70.0) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 280 [2021-12-21 10:58:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:47,647 INFO L225 Difference]: With dead ends: 10433 [2021-12-21 10:58:47,647 INFO L226 Difference]: Without dead ends: 7249 [2021-12-21 10:58:47,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:47,652 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 214 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:47,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 151 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:58:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7249 states. [2021-12-21 10:58:47,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7249 to 7242. [2021-12-21 10:58:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7241 states have (on average 1.1959674078165998) internal successors, (8660), 7241 states have internal predecessors, (8660), 0 states have call successors, (0), 0 states 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 10:58:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 8660 transitions. [2021-12-21 10:58:47,743 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 8660 transitions. Word has length 280 [2021-12-21 10:58:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:47,743 INFO L470 AbstractCegarLoop]: Abstraction has 7242 states and 8660 transitions. [2021-12-21 10:58:47,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.0) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 10:58:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 8660 transitions. [2021-12-21 10:58:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-21 10:58:47,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:47,748 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:47,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 10:58:47,748 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1580395159, now seen corresponding path program 1 times [2021-12-21 10:58:47,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:47,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466142947] [2021-12-21 10:58:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:47,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 157 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:47,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:47,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466142947] [2021-12-21 10:58:47,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466142947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:47,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097404672] [2021-12-21 10:58:47,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:47,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:47,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:47,962 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 10:58:47,963 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 10:58:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:48,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:58:48,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-21 10:58:48,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:48,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097404672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:48,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:48,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-21 10:58:48,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118053304] [2021-12-21 10:58:48,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:48,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:48,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:48,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:48,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:58:48,616 INFO L87 Difference]: Start difference. First operand 7242 states and 8660 transitions. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 10:58:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:49,614 INFO L93 Difference]: Finished difference Result 19470 states and 23084 transitions. [2021-12-21 10:58:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:49,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 283 [2021-12-21 10:58:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:49,665 INFO L225 Difference]: With dead ends: 19470 [2021-12-21 10:58:49,674 INFO L226 Difference]: Without dead ends: 12598 [2021-12-21 10:58:49,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:58:49,683 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 258 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:49,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 178 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:58:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12598 states. [2021-12-21 10:58:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12598 to 10010. [2021-12-21 10:58:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10010 states, 10009 states have (on average 1.1815366170446597) internal successors, (11826), 10009 states have internal predecessors, (11826), 0 states have call successors, (0), 0 states 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 10:58:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10010 states to 10010 states and 11826 transitions. [2021-12-21 10:58:49,818 INFO L78 Accepts]: Start accepts. Automaton has 10010 states and 11826 transitions. Word has length 283 [2021-12-21 10:58:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:49,818 INFO L470 AbstractCegarLoop]: Abstraction has 10010 states and 11826 transitions. [2021-12-21 10:58:49,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 10:58:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 10010 states and 11826 transitions. [2021-12-21 10:58:49,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-12-21 10:58:49,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:49,823 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, 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, 1, 1, 1, 1, 1, 1, 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 10:58:49,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 10:58:50,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:50,040 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:50,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1984989751, now seen corresponding path program 1 times [2021-12-21 10:58:50,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:50,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612828874] [2021-12-21 10:58:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:50,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-21 10:58:50,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:50,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612828874] [2021-12-21 10:58:50,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612828874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:50,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:50,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:50,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262444991] [2021-12-21 10:58:50,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:50,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:50,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:50,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:50,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:50,125 INFO L87 Difference]: Start difference. First operand 10010 states and 11826 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 10:58:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:50,724 INFO L93 Difference]: Finished difference Result 19648 states and 23262 transitions. [2021-12-21 10:58:50,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:50,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 295 [2021-12-21 10:58:50,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:50,747 INFO L225 Difference]: With dead ends: 19648 [2021-12-21 10:58:50,747 INFO L226 Difference]: Without dead ends: 10008 [2021-12-21 10:58:50,757 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 10:58:50,758 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 170 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:50,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 304 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10008 states. [2021-12-21 10:58:50,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10008 to 10008. [2021-12-21 10:58:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10008 states, 10007 states have (on average 1.1504946537423804) internal successors, (11513), 10007 states have internal predecessors, (11513), 0 states have call successors, (0), 0 states 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 10:58:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10008 states to 10008 states and 11513 transitions. [2021-12-21 10:58:50,876 INFO L78 Accepts]: Start accepts. Automaton has 10008 states and 11513 transitions. Word has length 295 [2021-12-21 10:58:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:50,877 INFO L470 AbstractCegarLoop]: Abstraction has 10008 states and 11513 transitions. [2021-12-21 10:58:50,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 10:58:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 10008 states and 11513 transitions. [2021-12-21 10:58:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-12-21 10:58:50,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:50,882 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, 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, 1, 1, 1, 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 10:58:50,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 10:58:50,882 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:50,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:50,883 INFO L85 PathProgramCache]: Analyzing trace with hash 286412562, now seen corresponding path program 1 times [2021-12-21 10:58:50,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:50,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090762949] [2021-12-21 10:58:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:50,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 125 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:51,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:51,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090762949] [2021-12-21 10:58:51,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090762949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:51,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066239877] [2021-12-21 10:58:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:51,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:51,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:51,037 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 10:58:51,038 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 10:58:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:51,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:58:51,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:51,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:51,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066239877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:51,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:51,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 10:58:51,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199657350] [2021-12-21 10:58:51,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:51,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:51,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:51,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:51,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:58:51,863 INFO L87 Difference]: Start difference. First operand 10008 states and 11513 transitions. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 10:58:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:52,511 INFO L93 Difference]: Finished difference Result 20954 states and 24251 transitions. [2021-12-21 10:58:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:52,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 298 [2021-12-21 10:58:52,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:52,526 INFO L225 Difference]: With dead ends: 20954 [2021-12-21 10:58:52,526 INFO L226 Difference]: Without dead ends: 11316 [2021-12-21 10:58:52,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:58:52,536 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 99 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:52,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 326 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11316 states. [2021-12-21 10:58:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11316 to 11307. [2021-12-21 10:58:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11307 states, 11306 states have (on average 1.151689368476915) internal successors, (13021), 11306 states have internal predecessors, (13021), 0 states have call successors, (0), 0 states 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 10:58:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11307 states to 11307 states and 13021 transitions. [2021-12-21 10:58:52,708 INFO L78 Accepts]: Start accepts. Automaton has 11307 states and 13021 transitions. Word has length 298 [2021-12-21 10:58:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:52,708 INFO L470 AbstractCegarLoop]: Abstraction has 11307 states and 13021 transitions. [2021-12-21 10:58:52,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 10:58:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 11307 states and 13021 transitions. [2021-12-21 10:58:52,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-21 10:58:52,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:52,713 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:52,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:52,930 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,SelfDestructingSolverStorable9 [2021-12-21 10:58:52,930 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1382301666, now seen corresponding path program 1 times [2021-12-21 10:58:52,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:52,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901532272] [2021-12-21 10:58:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:52,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-21 10:58:53,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:53,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901532272] [2021-12-21 10:58:53,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901532272] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:53,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366617551] [2021-12-21 10:58:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:53,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:53,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:53,051 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 10:58:53,052 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 10:58:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:53,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:58:53,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-21 10:58:53,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:58:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-21 10:58:55,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366617551] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:55,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:58:55,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-21 10:58:55,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725880516] [2021-12-21 10:58:55,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:55,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:55,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:55,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:58:55,013 INFO L87 Difference]: Start difference. First operand 11307 states and 13021 transitions. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:55,904 INFO L93 Difference]: Finished difference Result 18343 states and 21259 transitions. [2021-12-21 10:58:55,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:55,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 303 [2021-12-21 10:58:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:55,987 INFO L225 Difference]: With dead ends: 18343 [2021-12-21 10:58:55,987 INFO L226 Difference]: Without dead ends: 18341 [2021-12-21 10:58:55,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:58:55,989 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 263 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:55,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 206 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18341 states. [2021-12-21 10:58:56,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18341 to 12779. [2021-12-21 10:58:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12779 states, 12778 states have (on average 1.1523712631084677) internal successors, (14725), 12778 states have internal predecessors, (14725), 0 states have call successors, (0), 0 states 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 10:58:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12779 states to 12779 states and 14725 transitions. [2021-12-21 10:58:56,122 INFO L78 Accepts]: Start accepts. Automaton has 12779 states and 14725 transitions. Word has length 303 [2021-12-21 10:58:56,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:56,122 INFO L470 AbstractCegarLoop]: Abstraction has 12779 states and 14725 transitions. [2021-12-21 10:58:56,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 12779 states and 14725 transitions. [2021-12-21 10:58:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-12-21 10:58:56,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:56,129 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:56,161 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 10:58:56,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:56,346 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:56,347 INFO L85 PathProgramCache]: Analyzing trace with hash -807971748, now seen corresponding path program 1 times [2021-12-21 10:58:56,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:56,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136300371] [2021-12-21 10:58:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:56,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 55 proven. 70 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-21 10:58:56,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:56,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136300371] [2021-12-21 10:58:56,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136300371] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:56,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938378611] [2021-12-21 10:58:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:56,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:56,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:56,476 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 10:58:56,477 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 10:58:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:56,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:58:56,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-21 10:58:56,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:56,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938378611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:56,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:56,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 10:58:56,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001616754] [2021-12-21 10:58:56,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:56,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:56,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:56,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:56,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:58:56,951 INFO L87 Difference]: Start difference. First operand 12779 states and 14725 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 10:58:57,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:57,558 INFO L93 Difference]: Finished difference Result 28131 states and 32517 transitions. [2021-12-21 10:58:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:57,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 327 [2021-12-21 10:58:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:57,615 INFO L225 Difference]: With dead ends: 28131 [2021-12-21 10:58:57,616 INFO L226 Difference]: Without dead ends: 15722 [2021-12-21 10:58:57,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:58:57,643 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 133 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:57,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 369 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:57,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15722 states. [2021-12-21 10:58:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15722 to 14618. [2021-12-21 10:58:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14618 states, 14617 states have (on average 1.1441472258329342) internal successors, (16724), 14617 states have internal predecessors, (16724), 0 states have call successors, (0), 0 states 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 10:58:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14618 states to 14618 states and 16724 transitions. [2021-12-21 10:58:57,964 INFO L78 Accepts]: Start accepts. Automaton has 14618 states and 16724 transitions. Word has length 327 [2021-12-21 10:58:57,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:57,965 INFO L470 AbstractCegarLoop]: Abstraction has 14618 states and 16724 transitions. [2021-12-21 10:58:57,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 10:58:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 14618 states and 16724 transitions. [2021-12-21 10:58:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-12-21 10:58:57,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:57,995 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, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:58,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:58,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:58,212 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:58,213 INFO L85 PathProgramCache]: Analyzing trace with hash 332634922, now seen corresponding path program 1 times [2021-12-21 10:58:58,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:58,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406893490] [2021-12-21 10:58:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:58,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 281 proven. 27 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-21 10:58:58,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:58,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406893490] [2021-12-21 10:58:58,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406893490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:58,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942210047] [2021-12-21 10:58:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:58,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:58,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:58,536 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 10:58:58,537 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 10:58:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:58,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:58:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 362 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-21 10:58:59,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:59,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942210047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:59,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:59,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 10:58:59,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856053128] [2021-12-21 10:58:59,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:59,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:59,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:59,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:58:59,301 INFO L87 Difference]: Start difference. First operand 14618 states and 16724 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 10:58:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:59,821 INFO L93 Difference]: Finished difference Result 30531 states and 34952 transitions. [2021-12-21 10:58:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:59,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 352 [2021-12-21 10:58:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:59,840 INFO L225 Difference]: With dead ends: 30531 [2021-12-21 10:58:59,840 INFO L226 Difference]: Without dead ends: 16283 [2021-12-21 10:58:59,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:58:59,853 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 84 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:59,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 369 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:58:59,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16283 states. [2021-12-21 10:58:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16283 to 15360. [2021-12-21 10:58:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15360 states, 15359 states have (on average 1.1405039390585325) internal successors, (17517), 15359 states have internal predecessors, (17517), 0 states have call successors, (0), 0 states 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 10:58:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15360 states to 15360 states and 17517 transitions. [2021-12-21 10:58:59,990 INFO L78 Accepts]: Start accepts. Automaton has 15360 states and 17517 transitions. Word has length 352 [2021-12-21 10:58:59,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:59,990 INFO L470 AbstractCegarLoop]: Abstraction has 15360 states and 17517 transitions. [2021-12-21 10:58:59,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 10:58:59,990 INFO L276 IsEmpty]: Start isEmpty. Operand 15360 states and 17517 transitions. [2021-12-21 10:58:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-12-21 10:58:59,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:59,999 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, 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, 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 10:59:00,016 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 10:59:00,215 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,SelfDestructingSolverStorable12 [2021-12-21 10:59:00,216 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:00,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:00,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1737705753, now seen corresponding path program 1 times [2021-12-21 10:59:00,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:00,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135310722] [2021-12-21 10:59:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:00,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 208 proven. 168 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-21 10:59:00,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:00,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135310722] [2021-12-21 10:59:00,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135310722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:59:00,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264587755] [2021-12-21 10:59:00,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:00,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:59:00,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:59:00,436 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 10:59:00,437 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 10:59:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:00,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:59:00,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:59:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-21 10:59:01,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:59:01,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264587755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:59:01,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:59:01,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 10:59:01,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140334857] [2021-12-21 10:59:01,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:59:01,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:59:01,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:01,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:59:01,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:59:01,109 INFO L87 Difference]: Start difference. First operand 15360 states and 17517 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 10:59:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:01,586 INFO L93 Difference]: Finished difference Result 30720 states and 35028 transitions. [2021-12-21 10:59:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:59:01,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 373 [2021-12-21 10:59:01,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:01,601 INFO L225 Difference]: With dead ends: 30720 [2021-12-21 10:59:01,602 INFO L226 Difference]: Without dead ends: 15362 [2021-12-21 10:59:01,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:59:01,612 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 91 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:01,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 170 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:59:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15362 states. [2021-12-21 10:59:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15362 to 14256. [2021-12-21 10:59:01,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14256 states, 14255 states have (on average 1.1349701858996843) internal successors, (16179), 14255 states have internal predecessors, (16179), 0 states have call successors, (0), 0 states 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 10:59:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14256 states to 14256 states and 16179 transitions. [2021-12-21 10:59:01,849 INFO L78 Accepts]: Start accepts. Automaton has 14256 states and 16179 transitions. Word has length 373 [2021-12-21 10:59:01,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:01,850 INFO L470 AbstractCegarLoop]: Abstraction has 14256 states and 16179 transitions. [2021-12-21 10:59:01,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 10:59:01,850 INFO L276 IsEmpty]: Start isEmpty. Operand 14256 states and 16179 transitions. [2021-12-21 10:59:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-12-21 10:59:01,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:01,860 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, 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, 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 10:59:01,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:59:02,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:59:02,077 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:02,078 INFO L85 PathProgramCache]: Analyzing trace with hash -764587049, now seen corresponding path program 1 times [2021-12-21 10:59:02,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:02,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028199629] [2021-12-21 10:59:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:02,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 188 proven. 211 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-21 10:59:02,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:02,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028199629] [2021-12-21 10:59:02,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028199629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:59:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121113061] [2021-12-21 10:59:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:02,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:59:02,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:59:02,235 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 10:59:02,236 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 10:59:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:02,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:59:02,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:59:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-21 10:59:02,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:59:02,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121113061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:59:02,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:59:02,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 10:59:02,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986989406] [2021-12-21 10:59:02,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:59:02,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:59:02,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:59:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:59:02,996 INFO L87 Difference]: Start difference. First operand 14256 states and 16179 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 10:59:03,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:03,557 INFO L93 Difference]: Finished difference Result 31482 states and 35888 transitions. [2021-12-21 10:59:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:59:03,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 410 [2021-12-21 10:59:03,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:03,573 INFO L225 Difference]: With dead ends: 31482 [2021-12-21 10:59:03,574 INFO L226 Difference]: Without dead ends: 17596 [2021-12-21 10:59:03,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:59:03,583 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 105 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:03,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 306 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:59:03,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17596 states. [2021-12-21 10:59:03,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17596 to 17219. [2021-12-21 10:59:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17219 states, 17218 states have (on average 1.1388082239516786) internal successors, (19608), 17218 states have internal predecessors, (19608), 0 states have call successors, (0), 0 states 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 10:59:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17219 states to 17219 states and 19608 transitions. [2021-12-21 10:59:03,881 INFO L78 Accepts]: Start accepts. Automaton has 17219 states and 19608 transitions. Word has length 410 [2021-12-21 10:59:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:03,882 INFO L470 AbstractCegarLoop]: Abstraction has 17219 states and 19608 transitions. [2021-12-21 10:59:03,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 10:59:03,882 INFO L276 IsEmpty]: Start isEmpty. Operand 17219 states and 19608 transitions. [2021-12-21 10:59:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-12-21 10:59:03,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:03,894 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, 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, 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 10:59:03,913 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 10:59:04,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:59:04,111 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:04,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:04,111 INFO L85 PathProgramCache]: Analyzing trace with hash 890840300, now seen corresponding path program 1 times [2021-12-21 10:59:04,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:04,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814197412] [2021-12-21 10:59:04,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:04,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 188 proven. 229 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-21 10:59:04,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:04,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814197412] [2021-12-21 10:59:04,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814197412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:59:04,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378142767] [2021-12-21 10:59:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:04,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:59:04,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:59:04,283 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 10:59:04,284 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 10:59:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 10:59:04,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:59:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 293 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:59:06,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:59:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 293 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:59:09,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378142767] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:59:09,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:59:09,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2021-12-21 10:59:09,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620702861] [2021-12-21 10:59:09,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:59:09,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:59:09,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:09,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:59:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:59:09,206 INFO L87 Difference]: Start difference. First operand 17219 states and 19608 transitions. Second operand has 12 states, 12 states have (on average 83.33333333333333) internal successors, (1000), 11 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states 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 10:59:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:14,695 INFO L93 Difference]: Finished difference Result 47415 states and 53772 transitions. [2021-12-21 10:59:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-21 10:59:14,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 83.33333333333333) internal successors, (1000), 11 states have internal predecessors, (1000), 0 states have call successors, (0), 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 432 [2021-12-21 10:59:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:14,730 INFO L225 Difference]: With dead ends: 47415 [2021-12-21 10:59:14,730 INFO L226 Difference]: Without dead ends: 30014 [2021-12-21 10:59:14,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=1011, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 10:59:14,743 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 3830 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 7555 mSolverCounterSat, 1764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3830 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 9319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1764 IncrementalHoareTripleChecker+Valid, 7555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:14,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3830 Valid, 206 Invalid, 9319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1764 Valid, 7555 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-21 10:59:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30014 states. [2021-12-21 10:59:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30014 to 18668. [2021-12-21 10:59:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18668 states, 18667 states have (on average 1.1046767022017463) internal successors, (20621), 18667 states have internal predecessors, (20621), 0 states have call successors, (0), 0 states 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 10:59:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18668 states to 18668 states and 20621 transitions. [2021-12-21 10:59:14,965 INFO L78 Accepts]: Start accepts. Automaton has 18668 states and 20621 transitions. Word has length 432 [2021-12-21 10:59:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:14,965 INFO L470 AbstractCegarLoop]: Abstraction has 18668 states and 20621 transitions. [2021-12-21 10:59:14,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 83.33333333333333) internal successors, (1000), 11 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states 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 10:59:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 18668 states and 20621 transitions. [2021-12-21 10:59:14,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-12-21 10:59:14,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:14,976 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:59:14,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 10:59:15,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 10:59:15,193 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:15,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:15,193 INFO L85 PathProgramCache]: Analyzing trace with hash -482780604, now seen corresponding path program 1 times [2021-12-21 10:59:15,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:15,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14213398] [2021-12-21 10:59:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:15,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 525 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:59:15,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:15,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14213398] [2021-12-21 10:59:15,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14213398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:59:15,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200433178] [2021-12-21 10:59:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:15,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:59:15,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:59:15,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:59:15,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 10:59:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:15,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:59:15,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:59:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-21 10:59:16,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:59:16,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200433178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:59:16,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:59:16,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-21 10:59:16,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057746323] [2021-12-21 10:59:16,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:59:16,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:59:16,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:16,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:59:16,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:59:16,454 INFO L87 Difference]: Start difference. First operand 18668 states and 20621 transitions. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 10:59:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:17,093 INFO L93 Difference]: Finished difference Result 37337 states and 41264 transitions. [2021-12-21 10:59:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:59:17,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 448 [2021-12-21 10:59:17,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:17,112 INFO L225 Difference]: With dead ends: 37337 [2021-12-21 10:59:17,113 INFO L226 Difference]: Without dead ends: 19039 [2021-12-21 10:59:17,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:59:17,126 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 44 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:17,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 355 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:59:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19039 states. [2021-12-21 10:59:17,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19039 to 19036. [2021-12-21 10:59:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19036 states, 19035 states have (on average 1.1016023115313895) internal successors, (20969), 19035 states have internal predecessors, (20969), 0 states have call successors, (0), 0 states 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 10:59:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19036 states to 19036 states and 20969 transitions. [2021-12-21 10:59:17,328 INFO L78 Accepts]: Start accepts. Automaton has 19036 states and 20969 transitions. Word has length 448 [2021-12-21 10:59:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:17,329 INFO L470 AbstractCegarLoop]: Abstraction has 19036 states and 20969 transitions. [2021-12-21 10:59:17,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 10:59:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 19036 states and 20969 transitions. [2021-12-21 10:59:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2021-12-21 10:59:17,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:17,347 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, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-21 10:59:17,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 10:59:17,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 10:59:17,563 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:17,564 INFO L85 PathProgramCache]: Analyzing trace with hash 743274997, now seen corresponding path program 1 times [2021-12-21 10:59:17,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:17,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637563734] [2021-12-21 10:59:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:17,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 314 proven. 516 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2021-12-21 10:59:17,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:17,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637563734] [2021-12-21 10:59:17,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637563734] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:59:17,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265406387] [2021-12-21 10:59:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:17,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:59:17,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:59:17,709 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:59:17,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 10:59:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:17,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:59:17,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:59:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 701 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2021-12-21 10:59:18,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:59:18,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265406387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:59:18,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:59:18,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 10:59:18,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768350786] [2021-12-21 10:59:18,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:59:18,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:59:18,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:18,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:59:18,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:59:18,761 INFO L87 Difference]: Start difference. First operand 19036 states and 20969 transitions. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 10:59:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:19,741 INFO L93 Difference]: Finished difference Result 38624 states and 42525 transitions. [2021-12-21 10:59:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:59:19,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 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 569 [2021-12-21 10:59:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:19,759 INFO L225 Difference]: With dead ends: 38624 [2021-12-21 10:59:19,759 INFO L226 Difference]: Without dead ends: 19774 [2021-12-21 10:59:19,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:59:19,770 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 200 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:19,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 122 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:59:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19774 states. [2021-12-21 10:59:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19774 to 19588. [2021-12-21 10:59:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19588 states, 19587 states have (on average 1.099606882115689) internal successors, (21538), 19587 states have internal predecessors, (21538), 0 states have call successors, (0), 0 states 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 10:59:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19588 states to 19588 states and 21538 transitions. [2021-12-21 10:59:19,941 INFO L78 Accepts]: Start accepts. Automaton has 19588 states and 21538 transitions. Word has length 569 [2021-12-21 10:59:19,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:19,941 INFO L470 AbstractCegarLoop]: Abstraction has 19588 states and 21538 transitions. [2021-12-21 10:59:19,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 10:59:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 19588 states and 21538 transitions. [2021-12-21 10:59:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2021-12-21 10:59:19,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:19,958 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, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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 10:59:19,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 10:59:20,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 10:59:20,175 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:20,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:20,175 INFO L85 PathProgramCache]: Analyzing trace with hash -245713591, now seen corresponding path program 1 times [2021-12-21 10:59:20,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:20,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685112173] [2021-12-21 10:59:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:20,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 251 proven. 406 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-21 10:59:20,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:20,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685112173] [2021-12-21 10:59:20,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685112173] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:59:20,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101866508] [2021-12-21 10:59:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:20,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:59:20,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:59:20,416 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:59:20,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 10:59:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:20,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 10:59:20,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:59:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 286 proven. 469 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-21 10:59:21,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:59:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 251 proven. 406 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-21 10:59:23,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101866508] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:59:23,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:59:23,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2021-12-21 10:59:23,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462650428] [2021-12-21 10:59:23,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:59:23,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 10:59:23,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:23,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 10:59:23,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:59:23,766 INFO L87 Difference]: Start difference. First operand 19588 states and 21538 transitions. Second operand has 10 states, 10 states have (on average 85.1) internal successors, (851), 9 states have internal predecessors, (851), 0 states have call successors, (0), 0 states 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 10:59:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:26,009 INFO L93 Difference]: Finished difference Result 61129 states and 66877 transitions. [2021-12-21 10:59:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:59:26,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 85.1) internal successors, (851), 9 states have internal predecessors, (851), 0 states have call successors, (0), 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 587 [2021-12-21 10:59:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:26,053 INFO L225 Difference]: With dead ends: 61129 [2021-12-21 10:59:26,054 INFO L226 Difference]: Without dead ends: 41911 [2021-12-21 10:59:26,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 1168 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:59:26,072 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1073 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 3625 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 4101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 3625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:26,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 141 Invalid, 4101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 3625 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 10:59:26,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41911 states. [2021-12-21 10:59:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41911 to 30470. [2021-12-21 10:59:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30470 states, 30469 states have (on average 1.0938987167284782) internal successors, (33330), 30469 states have internal predecessors, (33330), 0 states have call successors, (0), 0 states 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 10:59:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30470 states to 30470 states and 33330 transitions. [2021-12-21 10:59:26,429 INFO L78 Accepts]: Start accepts. Automaton has 30470 states and 33330 transitions. Word has length 587 [2021-12-21 10:59:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:26,523 INFO L470 AbstractCegarLoop]: Abstraction has 30470 states and 33330 transitions. [2021-12-21 10:59:26,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 85.1) internal successors, (851), 9 states have internal predecessors, (851), 0 states have call successors, (0), 0 states 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 10:59:26,523 INFO L276 IsEmpty]: Start isEmpty. Operand 30470 states and 33330 transitions. [2021-12-21 10:59:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2021-12-21 10:59:26,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:26,539 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, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1] [2021-12-21 10:59:26,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 10:59:26,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:59:26,757 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:26,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1548100475, now seen corresponding path program 1 times [2021-12-21 10:59:26,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:26,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954212025] [2021-12-21 10:59:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:26,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 947 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-12-21 10:59:26,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:26,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954212025] [2021-12-21 10:59:26,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954212025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:59:26,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:59:26,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:59:26,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558062749] [2021-12-21 10:59:26,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:59:26,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:59:26,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:59:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:59:26,918 INFO L87 Difference]: Start difference. First operand 30470 states and 33330 transitions. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 10:59:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:27,921 INFO L93 Difference]: Finished difference Result 71645 states and 78264 transitions. [2021-12-21 10:59:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:59:27,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 601 [2021-12-21 10:59:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:27,959 INFO L225 Difference]: With dead ends: 71645 [2021-12-21 10:59:27,960 INFO L226 Difference]: Without dead ends: 40621 [2021-12-21 10:59:27,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:59:27,982 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 203 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:27,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 63 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:59:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40621 states. [2021-12-21 10:59:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40621 to 34884. [2021-12-21 10:59:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34884 states, 34883 states have (on average 1.0912192185305163) internal successors, (38065), 34883 states have internal predecessors, (38065), 0 states have call successors, (0), 0 states 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 10:59:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34884 states to 34884 states and 38065 transitions. [2021-12-21 10:59:28,336 INFO L78 Accepts]: Start accepts. Automaton has 34884 states and 38065 transitions. Word has length 601 [2021-12-21 10:59:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:28,336 INFO L470 AbstractCegarLoop]: Abstraction has 34884 states and 38065 transitions. [2021-12-21 10:59:28,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 10:59:28,337 INFO L276 IsEmpty]: Start isEmpty. Operand 34884 states and 38065 transitions. [2021-12-21 10:59:28,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2021-12-21 10:59:28,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:28,357 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, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 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] [2021-12-21 10:59:28,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 10:59:28,357 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:28,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:28,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1608928017, now seen corresponding path program 1 times [2021-12-21 10:59:28,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:28,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695743686] [2021-12-21 10:59:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:28,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 921 proven. 209 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-21 10:59:28,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:28,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695743686] [2021-12-21 10:59:28,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695743686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:59:28,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97160433] [2021-12-21 10:59:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:28,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:59:28,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:59:28,673 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:59:28,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 10:59:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:28,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:59:28,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:59:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 1004 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-21 10:59:29,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:59:29,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97160433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:59:29,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:59:29,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-21 10:59:29,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443087118] [2021-12-21 10:59:29,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:59:29,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:59:29,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:29,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:59:29,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:59:29,679 INFO L87 Difference]: Start difference. First operand 34884 states and 38065 transitions. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 10:59:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:30,372 INFO L93 Difference]: Finished difference Result 69587 states and 75943 transitions. [2021-12-21 10:59:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:59:30,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 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 627 [2021-12-21 10:59:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:30,407 INFO L225 Difference]: With dead ends: 69587 [2021-12-21 10:59:30,407 INFO L226 Difference]: Without dead ends: 34889 [2021-12-21 10:59:30,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:59:30,427 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 67 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:30,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 331 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:59:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34889 states. [2021-12-21 10:59:30,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34889 to 34884. [2021-12-21 10:59:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34884 states, 34883 states have (on average 1.0784909554797466) internal successors, (37621), 34883 states have internal predecessors, (37621), 0 states have call successors, (0), 0 states 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 10:59:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34884 states to 34884 states and 37621 transitions. [2021-12-21 10:59:30,745 INFO L78 Accepts]: Start accepts. Automaton has 34884 states and 37621 transitions. Word has length 627 [2021-12-21 10:59:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:30,745 INFO L470 AbstractCegarLoop]: Abstraction has 34884 states and 37621 transitions. [2021-12-21 10:59:30,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 10:59:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 34884 states and 37621 transitions. [2021-12-21 10:59:30,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2021-12-21 10:59:30,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:30,763 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, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:59:30,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 10:59:30,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-21 10:59:30,980 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1421710171, now seen corresponding path program 1 times [2021-12-21 10:59:30,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:30,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14136712] [2021-12-21 10:59:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:30,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 878 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2021-12-21 10:59:31,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:31,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14136712] [2021-12-21 10:59:31,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14136712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:59:31,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:59:31,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:59:31,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028447294] [2021-12-21 10:59:31,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:59:31,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:59:31,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:31,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:59:31,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:59:31,124 INFO L87 Difference]: Start difference. First operand 34884 states and 37621 transitions. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 10:59:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:31,875 INFO L93 Difference]: Finished difference Result 71981 states and 77623 transitions. [2021-12-21 10:59:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:59:31,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 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 643 [2021-12-21 10:59:31,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:31,911 INFO L225 Difference]: With dead ends: 71981 [2021-12-21 10:59:31,912 INFO L226 Difference]: Without dead ends: 39309 [2021-12-21 10:59:31,926 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 10:59:31,927 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 107 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:31,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 61 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:59:31,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39309 states. [2021-12-21 10:59:32,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39309 to 34138. [2021-12-21 10:59:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34138 states, 34137 states have (on average 1.0763980431789555) internal successors, (36745), 34137 states have internal predecessors, (36745), 0 states have call successors, (0), 0 states 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 10:59:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34138 states to 34138 states and 36745 transitions. [2021-12-21 10:59:32,266 INFO L78 Accepts]: Start accepts. Automaton has 34138 states and 36745 transitions. Word has length 643 [2021-12-21 10:59:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:32,266 INFO L470 AbstractCegarLoop]: Abstraction has 34138 states and 36745 transitions. [2021-12-21 10:59:32,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 10:59:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 34138 states and 36745 transitions. [2021-12-21 10:59:32,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 697 [2021-12-21 10:59:32,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:32,285 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, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 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] [2021-12-21 10:59:32,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 10:59:32,285 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:32,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:32,286 INFO L85 PathProgramCache]: Analyzing trace with hash 200944737, now seen corresponding path program 1 times [2021-12-21 10:59:32,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:32,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137352351] [2021-12-21 10:59:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:32,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1434 backedges. 1099 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-12-21 10:59:32,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:32,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137352351] [2021-12-21 10:59:32,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137352351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:59:32,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:59:32,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:59:32,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739450928] [2021-12-21 10:59:32,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:59:32,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:59:32,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:32,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:59:32,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:59:32,428 INFO L87 Difference]: Start difference. First operand 34138 states and 36745 transitions. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states 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 10:59:33,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:33,085 INFO L93 Difference]: Finished difference Result 68088 states and 73298 transitions. [2021-12-21 10:59:33,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:59:33,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 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 696 [2021-12-21 10:59:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:33,118 INFO L225 Difference]: With dead ends: 68088 [2021-12-21 10:59:33,118 INFO L226 Difference]: Without dead ends: 34320 [2021-12-21 10:59:33,137 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 10:59:33,138 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 61 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:33,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 296 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:59:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34320 states. [2021-12-21 10:59:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34320 to 33584. [2021-12-21 10:59:33,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33584 states, 33583 states have (on average 1.0676830539260935) internal successors, (35856), 33583 states have internal predecessors, (35856), 0 states have call successors, (0), 0 states 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 10:59:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33584 states to 33584 states and 35856 transitions. [2021-12-21 10:59:33,649 INFO L78 Accepts]: Start accepts. Automaton has 33584 states and 35856 transitions. Word has length 696 [2021-12-21 10:59:33,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:33,649 INFO L470 AbstractCegarLoop]: Abstraction has 33584 states and 35856 transitions. [2021-12-21 10:59:33,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states 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 10:59:33,649 INFO L276 IsEmpty]: Start isEmpty. Operand 33584 states and 35856 transitions. [2021-12-21 10:59:33,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2021-12-21 10:59:33,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:33,670 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-12-21 10:59:33,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 10:59:33,670 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:33,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:33,671 INFO L85 PathProgramCache]: Analyzing trace with hash -807446658, now seen corresponding path program 1 times [2021-12-21 10:59:33,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:33,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864052693] [2021-12-21 10:59:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:33,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 440 proven. 0 refuted. 0 times theorem prover too weak. 1802 trivial. 0 not checked. [2021-12-21 10:59:33,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:33,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864052693] [2021-12-21 10:59:33,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864052693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:59:33,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:59:33,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:59:33,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781554586] [2021-12-21 10:59:33,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:59:33,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:59:33,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:33,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:59:33,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:59:33,835 INFO L87 Difference]: Start difference. First operand 33584 states and 35856 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 10:59:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:34,520 INFO L93 Difference]: Finished difference Result 71046 states and 75874 transitions. [2021-12-21 10:59:34,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:59:34,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 760 [2021-12-21 10:59:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:34,557 INFO L225 Difference]: With dead ends: 71046 [2021-12-21 10:59:34,558 INFO L226 Difference]: Without dead ends: 37832 [2021-12-21 10:59:34,576 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 10:59:34,577 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 150 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:34,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 297 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:59:34,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37832 states. [2021-12-21 10:59:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37832 to 30641. [2021-12-21 10:59:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30641 states, 30640 states have (on average 1.0673629242819844) internal successors, (32704), 30640 states have internal predecessors, (32704), 0 states have call successors, (0), 0 states 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 10:59:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30641 states to 30641 states and 32704 transitions. [2021-12-21 10:59:34,931 INFO L78 Accepts]: Start accepts. Automaton has 30641 states and 32704 transitions. Word has length 760 [2021-12-21 10:59:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:34,931 INFO L470 AbstractCegarLoop]: Abstraction has 30641 states and 32704 transitions. [2021-12-21 10:59:34,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 10:59:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 30641 states and 32704 transitions. [2021-12-21 10:59:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2021-12-21 10:59:34,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:34,950 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:59:34,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 10:59:34,952 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:34,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1099534904, now seen corresponding path program 1 times [2021-12-21 10:59:34,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:34,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809875479] [2021-12-21 10:59:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:34,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1897 backedges. 1324 proven. 77 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-21 10:59:35,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:35,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809875479] [2021-12-21 10:59:35,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809875479] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:59:35,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375208589] [2021-12-21 10:59:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:35,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:59:35,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:59:35,294 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:59:35,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 10:59:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:59:35,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:59:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1897 backedges. 1401 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-21 10:59:36,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:59:36,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375208589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:59:36,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:59:36,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 10:59:36,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151486691] [2021-12-21 10:59:36,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:59:36,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:59:36,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:36,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:59:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:59:36,237 INFO L87 Difference]: Start difference. First operand 30641 states and 32704 transitions. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states 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 10:59:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:36,790 INFO L93 Difference]: Finished difference Result 61456 states and 65601 transitions. [2021-12-21 10:59:36,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:59:36,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 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 767 [2021-12-21 10:59:36,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:36,824 INFO L225 Difference]: With dead ends: 61456 [2021-12-21 10:59:36,824 INFO L226 Difference]: Without dead ends: 31185 [2021-12-21 10:59:36,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:59:36,844 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 59 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:36,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 125 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:59:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31185 states. [2021-12-21 10:59:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31185 to 27502. [2021-12-21 10:59:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27502 states, 27501 states have (on average 1.0617068470237445) internal successors, (29198), 27501 states have internal predecessors, (29198), 0 states have call successors, (0), 0 states 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 10:59:37,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27502 states to 27502 states and 29198 transitions. [2021-12-21 10:59:37,180 INFO L78 Accepts]: Start accepts. Automaton has 27502 states and 29198 transitions. Word has length 767 [2021-12-21 10:59:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:37,180 INFO L470 AbstractCegarLoop]: Abstraction has 27502 states and 29198 transitions. [2021-12-21 10:59:37,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states 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 10:59:37,181 INFO L276 IsEmpty]: Start isEmpty. Operand 27502 states and 29198 transitions. [2021-12-21 10:59:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2021-12-21 10:59:37,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:37,199 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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 10:59:37,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-21 10:59:37,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-21 10:59:37,413 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:37,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:37,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1099454636, now seen corresponding path program 1 times [2021-12-21 10:59:37,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:37,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409450001] [2021-12-21 10:59:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:37,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1729 backedges. 1191 proven. 0 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-12-21 10:59:37,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:37,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409450001] [2021-12-21 10:59:37,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409450001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:59:37,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:59:37,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:59:37,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026592306] [2021-12-21 10:59:37,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:59:37,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:59:37,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:37,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:59:37,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:59:37,597 INFO L87 Difference]: Start difference. First operand 27502 states and 29198 transitions. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 10:59:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:59:38,271 INFO L93 Difference]: Finished difference Result 54085 states and 57350 transitions. [2021-12-21 10:59:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:59:38,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 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 774 [2021-12-21 10:59:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:59:38,299 INFO L225 Difference]: With dead ends: 54085 [2021-12-21 10:59:38,299 INFO L226 Difference]: Without dead ends: 28611 [2021-12-21 10:59:38,311 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 10:59:38,312 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 139 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:59:38,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 69 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:59:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28611 states. [2021-12-21 10:59:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28611 to 26212. [2021-12-21 10:59:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26212 states, 26211 states have (on average 1.0592880851550877) internal successors, (27765), 26211 states have internal predecessors, (27765), 0 states have call successors, (0), 0 states 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 10:59:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26212 states to 26212 states and 27765 transitions. [2021-12-21 10:59:38,644 INFO L78 Accepts]: Start accepts. Automaton has 26212 states and 27765 transitions. Word has length 774 [2021-12-21 10:59:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:59:38,645 INFO L470 AbstractCegarLoop]: Abstraction has 26212 states and 27765 transitions. [2021-12-21 10:59:38,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 10:59:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 26212 states and 27765 transitions. [2021-12-21 10:59:38,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2021-12-21 10:59:38,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:59:38,665 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 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 10:59:38,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 10:59:38,665 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:59:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:59:38,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1609928325, now seen corresponding path program 1 times [2021-12-21 10:59:38,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:59:38,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847898683] [2021-12-21 10:59:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:38,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:59:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 1359 proven. 73 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2021-12-21 10:59:38,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:59:38,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847898683] [2021-12-21 10:59:38,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847898683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:59:38,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688048483] [2021-12-21 10:59:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:59:38,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:59:38,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:59:38,999 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:59:39,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 10:59:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:39,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 10:59:39,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:59:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 1050 proven. 496 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-21 10:59:41,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:59:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 1050 proven. 496 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-21 10:59:44,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688048483] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:59:44,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:59:44,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 13 [2021-12-21 10:59:44,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601411806] [2021-12-21 10:59:44,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:59:44,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 10:59:44,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:59:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 10:59:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:59:44,326 INFO L87 Difference]: Start difference. First operand 26212 states and 27765 transitions. Second operand has 13 states, 13 states have (on average 98.53846153846153) internal successors, (1281), 13 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)