./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/Problem16_label03.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 68b04b3e92efca531819e21670e21ddf77866a9f1ae7d2feefbb783a67657ca9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:31:12,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:31:12,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:31:12,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:31:12,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:31:12,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:31:12,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:31:12,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:31:12,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:31:12,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:31:12,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:31:12,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:31:12,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:31:12,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:31:12,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:31:12,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:31:12,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:31:12,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:31:12,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:31:12,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:31:12,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:31:12,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:31:12,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:31:12,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:31:12,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:31:12,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:31:12,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:31:12,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:31:12,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:31:12,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:31:12,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:31:12,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:31:12,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:31:12,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:31:12,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:31:12,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:31:12,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:31:12,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:31:12,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:31:12,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:31:12,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:31:12,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:31:12,466 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:31:12,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:31:12,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:31:12,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:31:12,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:31:12,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:31:12,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:31:12,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:31:12,471 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:31:12,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:31:12,472 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:31:12,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:31:12,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:31:12,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:31:12,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:31:12,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:31:12,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:31:12,473 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:31:12,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:31:12,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:31:12,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:31:12,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:31:12,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:31:12,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:31:12,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:31:12,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:31:12,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:31:12,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:31:12,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:31:12,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:31:12,476 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:31:12,476 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:31:12,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:31:12,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:31:12,477 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68b04b3e92efca531819e21670e21ddf77866a9f1ae7d2feefbb783a67657ca9 [2021-12-22 09:31:12,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:31:12,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:31:12,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:31:12,720 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:31:12,721 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:31:12,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label03.c [2021-12-22 09:31:12,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cc33a9fb/99a646c22ea649b18af53aab34f607bc/FLAG17346dd34 [2021-12-22 09:31:13,220 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:31:13,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label03.c [2021-12-22 09:31:13,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cc33a9fb/99a646c22ea649b18af53aab34f607bc/FLAG17346dd34 [2021-12-22 09:31:13,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cc33a9fb/99a646c22ea649b18af53aab34f607bc [2021-12-22 09:31:13,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:31:13,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:31:13,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:31:13,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:31:13,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:31:13,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:31:13" (1/1) ... [2021-12-22 09:31:13,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16331bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:13, skipping insertion in model container [2021-12-22 09:31:13,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:31:13" (1/1) ... [2021-12-22 09:31:13,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:31:13,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:31:13,731 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/Problem16_label03.c[1025,1038] [2021-12-22 09:31:14,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:31:14,039 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:31:14,050 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/Problem16_label03.c[1025,1038] [2021-12-22 09:31:14,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:31:14,175 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:31:14,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:14 WrapperNode [2021-12-22 09:31:14,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:31:14,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:31:14,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:31:14,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:31:14,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:14" (1/1) ... [2021-12-22 09:31:14,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:14" (1/1) ... [2021-12-22 09:31:14,347 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-22 09:31:14,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:31:14,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:31:14,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:31:14,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:31:14,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:14" (1/1) ... [2021-12-22 09:31:14,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:14" (1/1) ... [2021-12-22 09:31:14,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:14" (1/1) ... [2021-12-22 09:31:14,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:14" (1/1) ... [2021-12-22 09:31:14,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:14" (1/1) ... [2021-12-22 09:31:14,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:14" (1/1) ... [2021-12-22 09:31:14,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:14" (1/1) ... [2021-12-22 09:31:14,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:31:14,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:31:14,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:31:14,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:31:14,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:14" (1/1) ... [2021-12-22 09:31:14,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:31:14,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:31:14,480 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) [2021-12-22 09:31:14,495 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 [2021-12-22 09:31:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:31:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:31:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:31:14,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:31:14,566 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:31:14,567 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:31:16,011 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:31:16,023 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:31:16,023 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:31:16,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:31:16 BoogieIcfgContainer [2021-12-22 09:31:16,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:31:16,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:31:16,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:31:16,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:31:16,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:31:13" (1/3) ... [2021-12-22 09:31:16,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445c05e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:31:16, skipping insertion in model container [2021-12-22 09:31:16,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:31:14" (2/3) ... [2021-12-22 09:31:16,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445c05e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:31:16, skipping insertion in model container [2021-12-22 09:31:16,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:31:16" (3/3) ... [2021-12-22 09:31:16,031 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label03.c [2021-12-22 09:31:16,035 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:31:16,035 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:31:16,074 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:31:16,080 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 [2021-12-22 09:31:16,080 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:31:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:16,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 09:31:16,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:16,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 09:31:16,107 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:16,111 INFO L85 PathProgramCache]: Analyzing trace with hash 889694410, now seen corresponding path program 1 times [2021-12-22 09:31:16,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:16,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252429339] [2021-12-22 09:31:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:16,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:31:16,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:16,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252429339] [2021-12-22 09:31:16,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252429339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:16,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:16,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:31:16,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699048223] [2021-12-22 09:31:16,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:16,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:16,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:16,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:16,265 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:17,585 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2021-12-22 09:31:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:17,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 09:31:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:17,600 INFO L225 Difference]: With dead ends: 1122 [2021-12-22 09:31:17,600 INFO L226 Difference]: Without dead ends: 662 [2021-12-22 09:31:17,603 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 [2021-12-22 09:31:17,605 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 354 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:17,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 223 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:31:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-22 09:31:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-22 09:31:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5824508320726172) internal successors, (1046), 661 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1046 transitions. [2021-12-22 09:31:17,654 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1046 transitions. Word has length 6 [2021-12-22 09:31:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:17,655 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1046 transitions. [2021-12-22 09:31:17,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1046 transitions. [2021-12-22 09:31:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 09:31:17,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:17,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:17,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:31:17,658 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:17,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:17,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1927918847, now seen corresponding path program 1 times [2021-12-22 09:31:17,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:17,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491003593] [2021-12-22 09:31:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:17,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:31:17,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:17,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491003593] [2021-12-22 09:31:17,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491003593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:17,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:17,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:31:17,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69610018] [2021-12-22 09:31:17,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:17,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:17,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:17,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:17,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:17,775 INFO L87 Difference]: Start difference. First operand 662 states and 1046 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:18,701 INFO L93 Difference]: Finished difference Result 1651 states and 2539 transitions. [2021-12-22 09:31:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:18,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-22 09:31:18,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:18,704 INFO L225 Difference]: With dead ends: 1651 [2021-12-22 09:31:18,704 INFO L226 Difference]: Without dead ends: 991 [2021-12-22 09:31:18,706 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 [2021-12-22 09:31:18,707 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 338 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:18,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 77 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:31:18,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-12-22 09:31:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2021-12-22 09:31:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 1.3767676767676769) internal successors, (1363), 990 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:18,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1363 transitions. [2021-12-22 09:31:18,726 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1363 transitions. Word has length 77 [2021-12-22 09:31:18,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:18,726 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1363 transitions. [2021-12-22 09:31:18,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:18,727 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1363 transitions. [2021-12-22 09:31:18,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-22 09:31:18,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:18,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:18,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:31:18,729 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:18,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1360524730, now seen corresponding path program 1 times [2021-12-22 09:31:18,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:18,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569899448] [2021-12-22 09:31:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:18,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:31:18,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:18,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569899448] [2021-12-22 09:31:18,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569899448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:18,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:18,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:31:18,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784659472] [2021-12-22 09:31:18,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:18,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:18,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:18,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:18,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:18,803 INFO L87 Difference]: Start difference. First operand 991 states and 1363 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:19,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:19,774 INFO L93 Difference]: Finished difference Result 2967 states and 4084 transitions. [2021-12-22 09:31:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:19,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-22 09:31:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:19,780 INFO L225 Difference]: With dead ends: 2967 [2021-12-22 09:31:19,781 INFO L226 Difference]: Without dead ends: 1978 [2021-12-22 09:31:19,782 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 [2021-12-22 09:31:19,782 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 287 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:19,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 211 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:31:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-12-22 09:31:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-12-22 09:31:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.2463328275164391) internal successors, (2464), 1977 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2464 transitions. [2021-12-22 09:31:19,808 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2464 transitions. Word has length 78 [2021-12-22 09:31:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:19,809 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2464 transitions. [2021-12-22 09:31:19,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2464 transitions. [2021-12-22 09:31:19,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 09:31:19,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:19,813 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:19,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:31:19,813 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:19,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:19,814 INFO L85 PathProgramCache]: Analyzing trace with hash -640794733, now seen corresponding path program 1 times [2021-12-22 09:31:19,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:19,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613117499] [2021-12-22 09:31:19,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:19,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-22 09:31:19,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:19,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613117499] [2021-12-22 09:31:19,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613117499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:19,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:19,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:31:19,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3509986] [2021-12-22 09:31:19,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:19,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:19,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:19,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:19,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:19,946 INFO L87 Difference]: Start difference. First operand 1978 states and 2464 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:20,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:20,862 INFO L93 Difference]: Finished difference Result 4612 states and 5849 transitions. [2021-12-22 09:31:20,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:20,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-22 09:31:20,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:20,869 INFO L225 Difference]: With dead ends: 4612 [2021-12-22 09:31:20,869 INFO L226 Difference]: Without dead ends: 2636 [2021-12-22 09:31:20,871 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 [2021-12-22 09:31:20,871 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 358 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:20,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 156 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:31:20,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-12-22 09:31:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2307. [2021-12-22 09:31:20,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.2350390286209887) internal successors, (2848), 2306 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 2848 transitions. [2021-12-22 09:31:20,899 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 2848 transitions. Word has length 161 [2021-12-22 09:31:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:20,900 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 2848 transitions. [2021-12-22 09:31:20,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 2848 transitions. [2021-12-22 09:31:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-12-22 09:31:20,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:20,905 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 09:31:20,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:31:20,905 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:20,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1617279391, now seen corresponding path program 1 times [2021-12-22 09:31:20,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:20,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860631280] [2021-12-22 09:31:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:20,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-22 09:31:20,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:20,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860631280] [2021-12-22 09:31:20,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860631280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:20,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:20,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:31:20,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418035648] [2021-12-22 09:31:20,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:20,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:20,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:20,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:20,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:20,998 INFO L87 Difference]: Start difference. First operand 2307 states and 2848 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:22,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:22,193 INFO L93 Difference]: Finished difference Result 6915 states and 8539 transitions. [2021-12-22 09:31:22,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:22,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 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 338 [2021-12-22 09:31:22,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:22,204 INFO L225 Difference]: With dead ends: 6915 [2021-12-22 09:31:22,205 INFO L226 Difference]: Without dead ends: 4610 [2021-12-22 09:31:22,207 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 [2021-12-22 09:31:22,207 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 254 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:22,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 119 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:31:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-12-22 09:31:22,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2021-12-22 09:31:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 1.206552397483185) internal successors, (5561), 4609 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 5561 transitions. [2021-12-22 09:31:22,257 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 5561 transitions. Word has length 338 [2021-12-22 09:31:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:22,258 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 5561 transitions. [2021-12-22 09:31:22,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 5561 transitions. [2021-12-22 09:31:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-12-22 09:31:22,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:22,262 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:22,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:31:22,262 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:22,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:22,263 INFO L85 PathProgramCache]: Analyzing trace with hash -913889575, now seen corresponding path program 1 times [2021-12-22 09:31:22,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:22,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116464771] [2021-12-22 09:31:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:22,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 09:31:22,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:22,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116464771] [2021-12-22 09:31:22,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116464771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:22,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:22,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:22,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666351763] [2021-12-22 09:31:22,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:22,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:31:22,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:22,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:31:22,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:31:22,440 INFO L87 Difference]: Start difference. First operand 4610 states and 5561 transitions. Second operand has 4 states, 4 states have (on average 89.75) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:23,526 INFO L93 Difference]: Finished difference Result 9591 states and 11505 transitions. [2021-12-22 09:31:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 09:31:23,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 89.75) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 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 362 [2021-12-22 09:31:23,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:23,539 INFO L225 Difference]: With dead ends: 9591 [2021-12-22 09:31:23,540 INFO L226 Difference]: Without dead ends: 4983 [2021-12-22 09:31:23,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:31:23,546 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 175 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:23,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 371 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 09:31:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4983 states. [2021-12-22 09:31:23,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4983 to 4939. [2021-12-22 09:31:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 4938 states have (on average 1.194005670311867) internal successors, (5896), 4938 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 5896 transitions. [2021-12-22 09:31:23,616 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 5896 transitions. Word has length 362 [2021-12-22 09:31:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:23,618 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 5896 transitions. [2021-12-22 09:31:23,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.75) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 5896 transitions. [2021-12-22 09:31:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-12-22 09:31:23,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:23,623 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:23,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:31:23,623 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:23,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:23,624 INFO L85 PathProgramCache]: Analyzing trace with hash -734406808, now seen corresponding path program 1 times [2021-12-22 09:31:23,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:23,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055243767] [2021-12-22 09:31:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:23,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-22 09:31:23,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:23,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055243767] [2021-12-22 09:31:23,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055243767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:23,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:23,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 09:31:23,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664267237] [2021-12-22 09:31:23,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:23,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 09:31:23,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 09:31:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:31:23,833 INFO L87 Difference]: Start difference. First operand 4939 states and 5896 transitions. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:25,472 INFO L93 Difference]: Finished difference Result 9406 states and 11302 transitions. [2021-12-22 09:31:25,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 09:31:25,474 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 449 [2021-12-22 09:31:25,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:25,484 INFO L225 Difference]: With dead ends: 9406 [2021-12-22 09:31:25,485 INFO L226 Difference]: Without dead ends: 4610 [2021-12-22 09:31:25,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:31:25,490 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 401 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:25,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 289 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:31:25,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-12-22 09:31:25,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2021-12-22 09:31:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 1.0744196137990887) internal successors, (4952), 4609 states have internal predecessors, (4952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 4952 transitions. [2021-12-22 09:31:25,541 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 4952 transitions. Word has length 449 [2021-12-22 09:31:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:25,541 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 4952 transitions. [2021-12-22 09:31:25,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 4952 transitions. [2021-12-22 09:31:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-12-22 09:31:25,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:25,548 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:25,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:31:25,548 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:25,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:25,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1783293130, now seen corresponding path program 1 times [2021-12-22 09:31:25,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:25,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552253676] [2021-12-22 09:31:25,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:25,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-22 09:31:25,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:25,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552253676] [2021-12-22 09:31:25,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552253676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:25,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:25,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:25,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680692322] [2021-12-22 09:31:25,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:25,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:25,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:25,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:25,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:25,677 INFO L87 Difference]: Start difference. First operand 4610 states and 4952 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:26,394 INFO L93 Difference]: Finished difference Result 11192 states and 12126 transitions. [2021-12-22 09:31:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 477 [2021-12-22 09:31:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:26,411 INFO L225 Difference]: With dead ends: 11192 [2021-12-22 09:31:26,412 INFO L226 Difference]: Without dead ends: 6913 [2021-12-22 09:31:26,432 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 [2021-12-22 09:31:26,432 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 219 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:26,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 434 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:31:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2021-12-22 09:31:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 6584. [2021-12-22 09:31:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6584 states, 6583 states have (on average 1.0589396931490203) internal successors, (6971), 6583 states have internal predecessors, (6971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 6971 transitions. [2021-12-22 09:31:26,502 INFO L78 Accepts]: Start accepts. Automaton has 6584 states and 6971 transitions. Word has length 477 [2021-12-22 09:31:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:26,503 INFO L470 AbstractCegarLoop]: Abstraction has 6584 states and 6971 transitions. [2021-12-22 09:31:26,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6584 states and 6971 transitions. [2021-12-22 09:31:26,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2021-12-22 09:31:26,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:26,515 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:26,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:31:26,519 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:26,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:26,520 INFO L85 PathProgramCache]: Analyzing trace with hash -852118930, now seen corresponding path program 1 times [2021-12-22 09:31:26,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:26,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480422903] [2021-12-22 09:31:26,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:26,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 444 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 09:31:26,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:26,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480422903] [2021-12-22 09:31:26,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480422903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:26,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:26,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:26,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713989164] [2021-12-22 09:31:26,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:26,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:26,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:26,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:26,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:26,669 INFO L87 Difference]: Start difference. First operand 6584 states and 6971 transitions. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:27,383 INFO L93 Difference]: Finished difference Result 15140 states and 16150 transitions. [2021-12-22 09:31:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:27,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 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 540 [2021-12-22 09:31:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:27,407 INFO L225 Difference]: With dead ends: 15140 [2021-12-22 09:31:27,408 INFO L226 Difference]: Without dead ends: 8887 [2021-12-22 09:31:27,412 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 [2021-12-22 09:31:27,414 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 178 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:27,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 418 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 09:31:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2021-12-22 09:31:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8887. [2021-12-22 09:31:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8887 states, 8886 states have (on average 1.0525545802385776) internal successors, (9353), 8886 states have internal predecessors, (9353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8887 states to 8887 states and 9353 transitions. [2021-12-22 09:31:27,511 INFO L78 Accepts]: Start accepts. Automaton has 8887 states and 9353 transitions. Word has length 540 [2021-12-22 09:31:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:27,512 INFO L470 AbstractCegarLoop]: Abstraction has 8887 states and 9353 transitions. [2021-12-22 09:31:27,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:27,512 INFO L276 IsEmpty]: Start isEmpty. Operand 8887 states and 9353 transitions. [2021-12-22 09:31:27,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2021-12-22 09:31:27,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:27,518 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:27,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:31:27,519 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:27,519 INFO L85 PathProgramCache]: Analyzing trace with hash 14045898, now seen corresponding path program 1 times [2021-12-22 09:31:27,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:27,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956834603] [2021-12-22 09:31:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:27,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-12-22 09:31:27,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:27,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956834603] [2021-12-22 09:31:27,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956834603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:27,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:27,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:27,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988447557] [2021-12-22 09:31:27,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:27,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:27,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:27,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:27,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:27,732 INFO L87 Difference]: Start difference. First operand 8887 states and 9353 transitions. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:28,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:28,667 INFO L93 Difference]: Finished difference Result 20075 states and 21268 transitions. [2021-12-22 09:31:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:28,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 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 700 [2021-12-22 09:31:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:28,686 INFO L225 Difference]: With dead ends: 20075 [2021-12-22 09:31:28,687 INFO L226 Difference]: Without dead ends: 11519 [2021-12-22 09:31:28,694 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 [2021-12-22 09:31:28,695 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 192 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:28,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 442 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:31:28,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2021-12-22 09:31:28,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 10532. [2021-12-22 09:31:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 1.0496629000094957) internal successors, (11054), 10531 states have internal predecessors, (11054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 11054 transitions. [2021-12-22 09:31:28,803 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 11054 transitions. Word has length 700 [2021-12-22 09:31:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:28,804 INFO L470 AbstractCegarLoop]: Abstraction has 10532 states and 11054 transitions. [2021-12-22 09:31:28,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 11054 transitions. [2021-12-22 09:31:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2021-12-22 09:31:28,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:28,812 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:28,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:31:28,812 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:28,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:28,813 INFO L85 PathProgramCache]: Analyzing trace with hash 166482586, now seen corresponding path program 1 times [2021-12-22 09:31:28,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:28,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236985999] [2021-12-22 09:31:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:28,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 12 proven. 474 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-12-22 09:31:29,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:29,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236985999] [2021-12-22 09:31:29,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236985999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:31:29,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283374484] [2021-12-22 09:31:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:29,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:29,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:31:29,100 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) [2021-12-22 09:31:29,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:31:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:29,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:31:29,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:31:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-12-22 09:31:30,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:31:30,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283374484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:30,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:31:30,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 09:31:30,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711836041] [2021-12-22 09:31:30,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:30,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:30,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:31:30,208 INFO L87 Difference]: Start difference. First operand 10532 states and 11054 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:30,957 INFO L93 Difference]: Finished difference Result 20733 states and 21775 transitions. [2021-12-22 09:31:30,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:30,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 725 [2021-12-22 09:31:30,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:30,970 INFO L225 Difference]: With dead ends: 20733 [2021-12-22 09:31:30,970 INFO L226 Difference]: Without dead ends: 10532 [2021-12-22 09:31:30,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:31:30,978 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 361 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:30,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 377 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:31:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10532 states. [2021-12-22 09:31:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10532 to 10532. [2021-12-22 09:31:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 1.0441553508688635) internal successors, (10996), 10531 states have internal predecessors, (10996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 10996 transitions. [2021-12-22 09:31:31,076 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 10996 transitions. Word has length 725 [2021-12-22 09:31:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:31,077 INFO L470 AbstractCegarLoop]: Abstraction has 10532 states and 10996 transitions. [2021-12-22 09:31:31,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 10996 transitions. [2021-12-22 09:31:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2021-12-22 09:31:31,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:31,086 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:31,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:31:31,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 09:31:31,296 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:31,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1908497371, now seen corresponding path program 1 times [2021-12-22 09:31:31,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:31,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161791517] [2021-12-22 09:31:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:31,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-12-22 09:31:31,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:31,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161791517] [2021-12-22 09:31:31,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161791517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:31,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:31,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:31,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3328167] [2021-12-22 09:31:31,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:31,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:31,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:31,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:31,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:31,541 INFO L87 Difference]: Start difference. First operand 10532 states and 10996 transitions. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:32,219 INFO L93 Difference]: Finished difference Result 25668 states and 26885 transitions. [2021-12-22 09:31:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:32,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 834 [2021-12-22 09:31:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:32,242 INFO L225 Difference]: With dead ends: 25668 [2021-12-22 09:31:32,243 INFO L226 Difference]: Without dead ends: 14809 [2021-12-22 09:31:32,252 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 [2021-12-22 09:31:32,253 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 270 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:32,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 429 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 09:31:32,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14809 states. [2021-12-22 09:31:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14809 to 13822. [2021-12-22 09:31:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0374068446566818) internal successors, (14338), 13821 states have internal predecessors, (14338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14338 transitions. [2021-12-22 09:31:32,445 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14338 transitions. Word has length 834 [2021-12-22 09:31:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:32,446 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14338 transitions. [2021-12-22 09:31:32,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14338 transitions. [2021-12-22 09:31:32,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1091 [2021-12-22 09:31:32,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:32,465 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:32,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:31:32,465 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:32,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:32,466 INFO L85 PathProgramCache]: Analyzing trace with hash 132832260, now seen corresponding path program 1 times [2021-12-22 09:31:32,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:32,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417863843] [2021-12-22 09:31:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:32,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2239 backedges. 1614 proven. 0 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-12-22 09:31:32,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:32,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417863843] [2021-12-22 09:31:32,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417863843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:32,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:32,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:32,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426011079] [2021-12-22 09:31:32,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:32,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:32,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:32,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:32,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:32,709 INFO L87 Difference]: Start difference. First operand 13822 states and 14338 transitions. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:33,509 INFO L93 Difference]: Finished difference Result 27642 states and 28673 transitions. [2021-12-22 09:31:33,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:33,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 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 1090 [2021-12-22 09:31:33,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:33,525 INFO L225 Difference]: With dead ends: 27642 [2021-12-22 09:31:33,525 INFO L226 Difference]: Without dead ends: 13822 [2021-12-22 09:31:33,534 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 [2021-12-22 09:31:33,535 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 220 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:33,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 433 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:31:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2021-12-22 09:31:33,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 12835. [2021-12-22 09:31:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12835 states, 12834 states have (on average 1.0229858189184977) internal successors, (13129), 12834 states have internal predecessors, (13129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13129 transitions. [2021-12-22 09:31:33,645 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13129 transitions. Word has length 1090 [2021-12-22 09:31:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:33,646 INFO L470 AbstractCegarLoop]: Abstraction has 12835 states and 13129 transitions. [2021-12-22 09:31:33,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13129 transitions. [2021-12-22 09:31:33,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1092 [2021-12-22 09:31:33,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:33,661 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:33,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:31:33,662 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:33,662 INFO L85 PathProgramCache]: Analyzing trace with hash -965535051, now seen corresponding path program 1 times [2021-12-22 09:31:33,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:33,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174155233] [2021-12-22 09:31:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:33,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 432 proven. 0 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2021-12-22 09:31:33,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:33,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174155233] [2021-12-22 09:31:33,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174155233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:33,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:33,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:33,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379633450] [2021-12-22 09:31:33,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:33,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:33,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:33,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:33,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:33,938 INFO L87 Difference]: Start difference. First operand 12835 states and 13129 transitions. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:34,583 INFO L93 Difference]: Finished difference Result 27971 states and 28652 transitions. [2021-12-22 09:31:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:34,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 1091 [2021-12-22 09:31:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:34,596 INFO L225 Difference]: With dead ends: 27971 [2021-12-22 09:31:34,596 INFO L226 Difference]: Without dead ends: 13822 [2021-12-22 09:31:34,603 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 [2021-12-22 09:31:34,604 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 273 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:34,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 415 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 09:31:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2021-12-22 09:31:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 11848. [2021-12-22 09:31:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11848 states, 11847 states have (on average 1.0210179792352494) internal successors, (12096), 11847 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:34,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12096 transitions. [2021-12-22 09:31:34,721 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12096 transitions. Word has length 1091 [2021-12-22 09:31:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:34,722 INFO L470 AbstractCegarLoop]: Abstraction has 11848 states and 12096 transitions. [2021-12-22 09:31:34,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:34,722 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12096 transitions. [2021-12-22 09:31:34,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1264 [2021-12-22 09:31:34,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:34,739 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 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, 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, 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:31:34,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 09:31:34,739 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:34,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1215469920, now seen corresponding path program 1 times [2021-12-22 09:31:34,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:34,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711023933] [2021-12-22 09:31:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:34,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3318 backedges. 1930 proven. 0 refuted. 0 times theorem prover too weak. 1388 trivial. 0 not checked. [2021-12-22 09:31:35,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:35,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711023933] [2021-12-22 09:31:35,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711023933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:35,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:35,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:31:35,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47103746] [2021-12-22 09:31:35,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:35,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:35,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:35,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:35,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:31:35,121 INFO L87 Difference]: Start difference. First operand 11848 states and 12096 transitions. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:35,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:35,777 INFO L93 Difference]: Finished difference Result 24023 states and 24528 transitions. [2021-12-22 09:31:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:35,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 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 1263 [2021-12-22 09:31:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:35,790 INFO L225 Difference]: With dead ends: 24023 [2021-12-22 09:31:35,791 INFO L226 Difference]: Without dead ends: 12506 [2021-12-22 09:31:35,800 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 [2021-12-22 09:31:35,802 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:35,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 434 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 09:31:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-12-22 09:31:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 12506. [2021-12-22 09:31:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12506 states, 12505 states have (on average 1.0203118752499) internal successors, (12759), 12505 states have internal predecessors, (12759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 12759 transitions. [2021-12-22 09:31:35,917 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 12759 transitions. Word has length 1263 [2021-12-22 09:31:35,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:35,918 INFO L470 AbstractCegarLoop]: Abstraction has 12506 states and 12759 transitions. [2021-12-22 09:31:35,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 12759 transitions. [2021-12-22 09:31:35,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1318 [2021-12-22 09:31:35,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:35,935 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 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, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:35,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 09:31:35,936 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:35,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1261915355, now seen corresponding path program 1 times [2021-12-22 09:31:35,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:35,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172809196] [2021-12-22 09:31:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:35,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3322 backedges. 2153 proven. 66 refuted. 0 times theorem prover too weak. 1103 trivial. 0 not checked. [2021-12-22 09:31:36,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:36,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172809196] [2021-12-22 09:31:36,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172809196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:31:36,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665940414] [2021-12-22 09:31:36,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:36,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:36,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:31:36,360 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) [2021-12-22 09:31:36,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:31:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:36,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1567 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 09:31:36,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:31:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3322 backedges. 1643 proven. 201 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2021-12-22 09:31:40,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:31:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3322 backedges. 1643 proven. 201 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2021-12-22 09:31:46,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665940414] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:31:46,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:31:46,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-22 09:31:46,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409082932] [2021-12-22 09:31:46,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:31:46,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 09:31:46,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:46,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 09:31:46,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:31:46,607 INFO L87 Difference]: Start difference. First operand 12506 states and 12759 transitions. Second operand has 9 states, 9 states have (on average 189.55555555555554) internal successors, (1706), 8 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:50,537 INFO L93 Difference]: Finished difference Result 37512 states and 38253 transitions. [2021-12-22 09:31:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 09:31:50,538 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 189.55555555555554) internal successors, (1706), 8 states have internal predecessors, (1706), 0 states have call successors, (0), 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 1317 [2021-12-22 09:31:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:50,592 INFO L225 Difference]: With dead ends: 37512 [2021-12-22 09:31:50,592 INFO L226 Difference]: Without dead ends: 24679 [2021-12-22 09:31:50,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2644 GetRequests, 2629 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-12-22 09:31:50,606 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2106 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 6170 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2106 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 6440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 6170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:50,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2106 Valid, 82 Invalid, 6440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 6170 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-22 09:31:50,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24679 states. [2021-12-22 09:31:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24679 to 18099. [2021-12-22 09:31:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18099 states, 18098 states have (on average 1.019283898773345) internal successors, (18447), 18098 states have internal predecessors, (18447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18099 states to 18099 states and 18447 transitions. [2021-12-22 09:31:50,795 INFO L78 Accepts]: Start accepts. Automaton has 18099 states and 18447 transitions. Word has length 1317 [2021-12-22 09:31:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:50,796 INFO L470 AbstractCegarLoop]: Abstraction has 18099 states and 18447 transitions. [2021-12-22 09:31:50,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 189.55555555555554) internal successors, (1706), 8 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 18099 states and 18447 transitions. [2021-12-22 09:31:50,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1348 [2021-12-22 09:31:50,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:50,824 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:31:50,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 09:31:51,030 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,SelfDestructingSolverStorable15 [2021-12-22 09:31:51,030 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:51,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:51,031 INFO L85 PathProgramCache]: Analyzing trace with hash -18592964, now seen corresponding path program 1 times [2021-12-22 09:31:51,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:51,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489101316] [2021-12-22 09:31:51,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:51,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3958 backedges. 1745 proven. 156 refuted. 0 times theorem prover too weak. 2057 trivial. 0 not checked. [2021-12-22 09:31:51,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:51,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489101316] [2021-12-22 09:31:51,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489101316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:31:51,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667852438] [2021-12-22 09:31:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:51,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:51,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:31:51,377 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) [2021-12-22 09:31:51,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 09:31:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:51,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1621 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 09:31:51,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:31:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3958 backedges. 1901 proven. 0 refuted. 0 times theorem prover too weak. 2057 trivial. 0 not checked. [2021-12-22 09:31:53,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:31:53,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667852438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:53,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:31:53,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-22 09:31:53,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980158545] [2021-12-22 09:31:53,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:53,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:31:53,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:53,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:31:53,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:31:53,571 INFO L87 Difference]: Start difference. First operand 18099 states and 18447 transitions. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:54,360 INFO L93 Difference]: Finished difference Result 37841 states and 38582 transitions. [2021-12-22 09:31:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:31:54,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 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 1347 [2021-12-22 09:31:54,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:54,375 INFO L225 Difference]: With dead ends: 37841 [2021-12-22 09:31:54,376 INFO L226 Difference]: Without dead ends: 19744 [2021-12-22 09:31:54,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1351 GetRequests, 1346 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:31:54,386 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:54,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 94 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:31:54,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2021-12-22 09:31:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 18099. [2021-12-22 09:31:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18099 states, 18098 states have (on average 1.017957785390651) internal successors, (18423), 18098 states have internal predecessors, (18423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18099 states to 18099 states and 18423 transitions. [2021-12-22 09:31:54,608 INFO L78 Accepts]: Start accepts. Automaton has 18099 states and 18423 transitions. Word has length 1347 [2021-12-22 09:31:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:54,609 INFO L470 AbstractCegarLoop]: Abstraction has 18099 states and 18423 transitions. [2021-12-22 09:31:54,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 18099 states and 18423 transitions. [2021-12-22 09:31:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1603 [2021-12-22 09:31:54,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:54,630 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2021-12-22 09:31:54,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 09:31:54,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:54,843 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1375832292, now seen corresponding path program 1 times [2021-12-22 09:31:54,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:54,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087190269] [2021-12-22 09:31:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:54,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4548 backedges. 3184 proven. 0 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2021-12-22 09:31:55,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:55,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087190269] [2021-12-22 09:31:55,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087190269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:31:55,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:31:55,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 09:31:55,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806226630] [2021-12-22 09:31:55,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:31:55,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 09:31:55,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:31:55,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 09:31:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:31:55,309 INFO L87 Difference]: Start difference. First operand 18099 states and 18423 transitions. Second operand has 5 states, 5 states have (on average 154.8) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:56,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:31:56,612 INFO L93 Difference]: Finished difference Result 36534 states and 37187 transitions. [2021-12-22 09:31:56,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 09:31:56,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 154.8) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 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 1602 [2021-12-22 09:31:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:31:56,636 INFO L225 Difference]: With dead ends: 36534 [2021-12-22 09:31:56,636 INFO L226 Difference]: Without dead ends: 18766 [2021-12-22 09:31:56,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:31:56,646 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 603 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:31:56,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 433 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:31:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18766 states. [2021-12-22 09:31:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18766 to 18428. [2021-12-22 09:31:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18428 states, 18427 states have (on average 1.017420090085201) internal successors, (18748), 18427 states have internal predecessors, (18748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18428 states to 18428 states and 18748 transitions. [2021-12-22 09:31:56,826 INFO L78 Accepts]: Start accepts. Automaton has 18428 states and 18748 transitions. Word has length 1602 [2021-12-22 09:31:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:31:56,826 INFO L470 AbstractCegarLoop]: Abstraction has 18428 states and 18748 transitions. [2021-12-22 09:31:56,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.8) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:31:56,826 INFO L276 IsEmpty]: Start isEmpty. Operand 18428 states and 18748 transitions. [2021-12-22 09:31:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1859 [2021-12-22 09:31:56,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:31:56,851 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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] [2021-12-22 09:31:56,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 09:31:56,851 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:31:56,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:31:56,852 INFO L85 PathProgramCache]: Analyzing trace with hash -79314125, now seen corresponding path program 1 times [2021-12-22 09:31:56,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:31:56,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201899121] [2021-12-22 09:31:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:56,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:31:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 3270 proven. 1035 refuted. 0 times theorem prover too weak. 1907 trivial. 0 not checked. [2021-12-22 09:31:57,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:31:57,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201899121] [2021-12-22 09:31:57,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201899121] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:31:57,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864405367] [2021-12-22 09:31:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:31:57,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:31:57,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:31:57,585 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) [2021-12-22 09:31:57,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 09:31:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:31:58,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 2168 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:31:58,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:32:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 3384 proven. 0 refuted. 0 times theorem prover too weak. 2828 trivial. 0 not checked. [2021-12-22 09:32:00,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:32:00,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864405367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:32:00,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:32:00,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-22 09:32:00,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543898759] [2021-12-22 09:32:00,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:32:00,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:32:00,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:32:00,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:32:00,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 09:32:00,326 INFO L87 Difference]: Start difference. First operand 18428 states and 18748 transitions. Second operand has 4 states, 4 states have (on average 214.5) internal successors, (858), 4 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:32:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:32:01,365 INFO L93 Difference]: Finished difference Result 36525 states and 37163 transitions. [2021-12-22 09:32:01,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:32:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 214.5) internal successors, (858), 4 states have internal predecessors, (858), 0 states have call successors, (0), 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 1858 [2021-12-22 09:32:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:32:01,381 INFO L225 Difference]: With dead ends: 36525 [2021-12-22 09:32:01,381 INFO L226 Difference]: Without dead ends: 18428 [2021-12-22 09:32:01,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1866 GetRequests, 1858 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 09:32:01,389 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 203 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:32:01,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 405 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:32:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18428 states. [2021-12-22 09:32:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18428 to 18428. [2021-12-22 09:32:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18428 states, 18427 states have (on average 1.0172030173115536) internal successors, (18744), 18427 states have internal predecessors, (18744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:32:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18428 states to 18428 states and 18744 transitions. [2021-12-22 09:32:01,535 INFO L78 Accepts]: Start accepts. Automaton has 18428 states and 18744 transitions. Word has length 1858 [2021-12-22 09:32:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:32:01,536 INFO L470 AbstractCegarLoop]: Abstraction has 18428 states and 18744 transitions. [2021-12-22 09:32:01,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 214.5) internal successors, (858), 4 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:32:01,537 INFO L276 IsEmpty]: Start isEmpty. Operand 18428 states and 18744 transitions. [2021-12-22 09:32:01,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2076 [2021-12-22 09:32:01,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:32:01,598 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:32:01,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-22 09:32:01,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:32:01,801 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:32:01,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:32:01,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1958083295, now seen corresponding path program 1 times [2021-12-22 09:32:01,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:32:01,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40849793] [2021-12-22 09:32:01,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:32:01,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:32:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:32:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8294 backedges. 4696 proven. 1581 refuted. 0 times theorem prover too weak. 2017 trivial. 0 not checked. [2021-12-22 09:32:02,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:32:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40849793] [2021-12-22 09:32:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40849793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:32:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91919962] [2021-12-22 09:32:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:32:02,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:32:02,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:32:02,559 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) [2021-12-22 09:32:02,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 09:32:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:32:03,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 2429 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 09:32:03,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:32:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8294 backedges. 4672 proven. 0 refuted. 0 times theorem prover too weak. 3622 trivial. 0 not checked. [2021-12-22 09:32:05,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:32:05,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91919962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:32:05,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:32:05,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 09:32:05,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721613076] [2021-12-22 09:32:05,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:32:05,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:32:05,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:32:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:32:05,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:32:05,168 INFO L87 Difference]: Start difference. First operand 18428 states and 18744 transitions. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:32:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:32:05,811 INFO L93 Difference]: Finished difference Result 37183 states and 37824 transitions. [2021-12-22 09:32:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:32:05,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 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 2075 [2021-12-22 09:32:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:32:05,832 INFO L225 Difference]: With dead ends: 37183 [2021-12-22 09:32:05,832 INFO L226 Difference]: Without dead ends: 19086 [2021-12-22 09:32:05,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2080 GetRequests, 2076 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:32:05,844 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 263 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:32:05,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 431 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 09:32:05,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19086 states. [2021-12-22 09:32:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19086 to 19086. [2021-12-22 09:32:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19086 states, 19085 states have (on average 1.0168194917474456) internal successors, (19406), 19085 states have internal predecessors, (19406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:32:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19086 states to 19086 states and 19406 transitions. [2021-12-22 09:32:06,019 INFO L78 Accepts]: Start accepts. Automaton has 19086 states and 19406 transitions. Word has length 2075 [2021-12-22 09:32:06,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:32:06,020 INFO L470 AbstractCegarLoop]: Abstraction has 19086 states and 19406 transitions. [2021-12-22 09:32:06,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:32:06,020 INFO L276 IsEmpty]: Start isEmpty. Operand 19086 states and 19406 transitions. [2021-12-22 09:32:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2289 [2021-12-22 09:32:06,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:32:06,051 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:32:06,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 09:32:06,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:32:06,267 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:32:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:32:06,268 INFO L85 PathProgramCache]: Analyzing trace with hash -601512558, now seen corresponding path program 1 times [2021-12-22 09:32:06,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:32:06,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119831275] [2021-12-22 09:32:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:32:06,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:32:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:32:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9547 backedges. 4726 proven. 1035 refuted. 0 times theorem prover too weak. 3786 trivial. 0 not checked. [2021-12-22 09:32:07,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:32:07,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119831275] [2021-12-22 09:32:07,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119831275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:32:07,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260288454] [2021-12-22 09:32:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:32:07,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:32:07,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:32:07,042 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) [2021-12-22 09:32:07,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 09:32:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:32:07,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2642 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:32:07,508 INFO L286 TraceCheckSpWp]: Computing forward predicates...