./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.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 71189e3cc465fa9296e61b90c4b4428a637cf1ec8723797967b75b70226f0c15 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:16:20,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:16:20,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:16:20,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:16:20,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:16:20,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:16:20,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:16:20,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:16:20,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:16:20,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:16:20,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:16:20,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:16:20,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:16:20,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:16:20,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:16:20,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:16:20,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:16:20,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:16:20,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:16:20,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:16:20,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:16:20,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:16:20,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:16:20,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:16:20,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:16:20,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:16:20,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:16:20,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:16:20,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:16:20,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:16:20,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:16:20,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:16:20,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:16:20,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:16:20,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:16:20,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:16:20,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:16:20,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:16:20,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:16:20,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:16:20,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:16:20,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:16:20,357 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:16:20,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:16:20,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:16:20,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:16:20,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:16:20,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:16:20,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:16:20,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:16:20,362 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:16:20,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:16:20,363 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:16:20,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:16:20,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:16:20,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:16:20,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:16:20,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:16:20,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:16:20,364 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:16:20,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:16:20,364 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:16:20,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:16:20,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:16:20,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:16:20,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:16:20,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:16:20,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:16:20,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:16:20,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:16:20,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:16:20,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:16:20,366 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:16:20,366 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:16:20,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:16:20,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:16:20,366 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71189e3cc465fa9296e61b90c4b4428a637cf1ec8723797967b75b70226f0c15 [2021-12-14 16:16:20,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:16:20,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:16:20,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:16:20,528 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:16:20,529 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:16:20,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c [2021-12-14 16:16:20,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61538487f/0a1f5b13c293407291ae9090e5cca69d/FLAGa4bc50e2b [2021-12-14 16:16:20,983 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:16:20,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c [2021-12-14 16:16:20,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61538487f/0a1f5b13c293407291ae9090e5cca69d/FLAGa4bc50e2b [2021-12-14 16:16:21,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61538487f/0a1f5b13c293407291ae9090e5cca69d [2021-12-14 16:16:21,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:16:21,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:16:21,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:16:21,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:16:21,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:16:21,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:16:21" (1/1) ... [2021-12-14 16:16:21,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@575fe930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21, skipping insertion in model container [2021-12-14 16:16:21,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:16:21" (1/1) ... [2021-12-14 16:16:21,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:16:21,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:16:21,215 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/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c[913,926] [2021-12-14 16:16:21,248 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/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c[5977,5990] [2021-12-14 16:16:21,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:16:21,338 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:16:21,346 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/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c[913,926] [2021-12-14 16:16:21,368 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/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c[5977,5990] [2021-12-14 16:16:21,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:16:21,413 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:16:21,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21 WrapperNode [2021-12-14 16:16:21,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:16:21,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:16:21,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:16:21,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:16:21,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21" (1/1) ... [2021-12-14 16:16:21,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21" (1/1) ... [2021-12-14 16:16:21,467 INFO L137 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 823 [2021-12-14 16:16:21,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:16:21,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:16:21,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:16:21,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:16:21,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21" (1/1) ... [2021-12-14 16:16:21,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21" (1/1) ... [2021-12-14 16:16:21,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21" (1/1) ... [2021-12-14 16:16:21,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21" (1/1) ... [2021-12-14 16:16:21,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21" (1/1) ... [2021-12-14 16:16:21,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21" (1/1) ... [2021-12-14 16:16:21,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21" (1/1) ... [2021-12-14 16:16:21,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:16:21,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:16:21,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:16:21,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:16:21,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21" (1/1) ... [2021-12-14 16:16:21,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:16:21,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:21,550 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) [2021-12-14 16:16:21,567 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 [2021-12-14 16:16:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:16:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:16:21,591 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:16:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-14 16:16:21,591 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-14 16:16:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:16:21,591 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:16:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:16:21,592 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:16:21,592 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:16:21,592 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:16:21,592 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:16:21,592 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:16:21,592 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:16:21,592 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:16:21,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:16:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:16:21,593 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:16:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:16:21,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:16:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:16:21,593 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:16:21,670 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:16:21,671 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:16:22,198 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:16:22,205 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:16:22,205 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-12-14 16:16:22,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:16:22 BoogieIcfgContainer [2021-12-14 16:16:22,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:16:22,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:16:22,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:16:22,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:16:22,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:16:21" (1/3) ... [2021-12-14 16:16:22,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76066098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:16:22, skipping insertion in model container [2021-12-14 16:16:22,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:21" (2/3) ... [2021-12-14 16:16:22,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76066098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:16:22, skipping insertion in model container [2021-12-14 16:16:22,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:16:22" (3/3) ... [2021-12-14 16:16:22,213 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.08.cil-1.c [2021-12-14 16:16:22,217 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:16:22,217 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:16:22,249 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:16:22,255 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 [2021-12-14 16:16:22,256 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:16:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 354 states, 314 states have (on average 1.6305732484076434) internal successors, (512), 319 states have internal predecessors, (512), 28 states have call successors, (28), 9 states have call predecessors, (28), 9 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-14 16:16:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:16:22,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:22,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:22,290 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:22,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:22,299 INFO L85 PathProgramCache]: Analyzing trace with hash -728515796, now seen corresponding path program 1 times [2021-12-14 16:16:22,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:22,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254242242] [2021-12-14 16:16:22,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:22,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:22,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:22,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 16:16:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:22,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:22,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254242242] [2021-12-14 16:16:22,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254242242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:22,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:22,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:22,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591859666] [2021-12-14 16:16:22,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:22,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:22,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:22,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:22,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:22,508 INFO L87 Difference]: Start difference. First operand has 354 states, 314 states have (on average 1.6305732484076434) internal successors, (512), 319 states have internal predecessors, (512), 28 states have call successors, (28), 9 states have call predecessors, (28), 9 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 16:16:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:22,904 INFO L93 Difference]: Finished difference Result 695 states and 1111 transitions. [2021-12-14 16:16:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:22,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-14 16:16:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:22,921 INFO L225 Difference]: With dead ends: 695 [2021-12-14 16:16:22,922 INFO L226 Difference]: Without dead ends: 353 [2021-12-14 16:16:22,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:22,931 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 306 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:22,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1045 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:16:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-14 16:16:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 344. [2021-12-14 16:16:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 306 states have (on average 1.5326797385620916) internal successors, (469), 309 states have internal predecessors, (469), 28 states have call successors, (28), 9 states have call predecessors, (28), 8 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-14 16:16:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 523 transitions. [2021-12-14 16:16:22,992 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 523 transitions. Word has length 44 [2021-12-14 16:16:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:22,992 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 523 transitions. [2021-12-14 16:16:22,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 16:16:22,992 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 523 transitions. [2021-12-14 16:16:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:16:22,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:22,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:22,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:16:22,995 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1116851370, now seen corresponding path program 1 times [2021-12-14 16:16:22,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:22,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198636081] [2021-12-14 16:16:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:22,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 16:16:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:23,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:23,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198636081] [2021-12-14 16:16:23,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198636081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:23,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:23,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:23,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912925012] [2021-12-14 16:16:23,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:23,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:23,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:23,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:23,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:23,074 INFO L87 Difference]: Start difference. First operand 344 states and 523 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:23,212 INFO L93 Difference]: Finished difference Result 476 states and 708 transitions. [2021-12-14 16:16:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-14 16:16:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:23,215 INFO L225 Difference]: With dead ends: 476 [2021-12-14 16:16:23,215 INFO L226 Difference]: Without dead ends: 414 [2021-12-14 16:16:23,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:23,217 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 695 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:23,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 861 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-12-14 16:16:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 408. [2021-12-14 16:16:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 363 states have (on average 1.5013774104683195) internal successors, (545), 367 states have internal predecessors, (545), 32 states have call successors, (32), 11 states have call predecessors, (32), 11 states have return successors, (36), 30 states have call predecessors, (36), 30 states have call successors, (36) [2021-12-14 16:16:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 613 transitions. [2021-12-14 16:16:23,234 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 613 transitions. Word has length 44 [2021-12-14 16:16:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:23,234 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 613 transitions. [2021-12-14 16:16:23,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 613 transitions. [2021-12-14 16:16:23,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:16:23,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:23,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:23,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:16:23,238 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:23,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1978263529, now seen corresponding path program 1 times [2021-12-14 16:16:23,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:23,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776809511] [2021-12-14 16:16:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:23,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:16:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:23,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:23,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776809511] [2021-12-14 16:16:23,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776809511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:23,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:23,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:23,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106539926] [2021-12-14 16:16:23,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:23,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:23,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:23,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:23,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:23,288 INFO L87 Difference]: Start difference. First operand 408 states and 613 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:23,531 INFO L93 Difference]: Finished difference Result 656 states and 953 transitions. [2021-12-14 16:16:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:23,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-14 16:16:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:23,534 INFO L225 Difference]: With dead ends: 656 [2021-12-14 16:16:23,535 INFO L226 Difference]: Without dead ends: 532 [2021-12-14 16:16:23,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:23,536 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 287 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:23,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 1151 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:16:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-12-14 16:16:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 475. [2021-12-14 16:16:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 424 states have (on average 1.4834905660377358) internal successors, (629), 428 states have internal predecessors, (629), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (39), 33 states have call predecessors, (39), 33 states have call successors, (39) [2021-12-14 16:16:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 703 transitions. [2021-12-14 16:16:23,564 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 703 transitions. Word has length 45 [2021-12-14 16:16:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:23,564 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 703 transitions. [2021-12-14 16:16:23,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 703 transitions. [2021-12-14 16:16:23,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:16:23,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:23,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:23,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:16:23,566 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:23,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:23,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1032346306, now seen corresponding path program 1 times [2021-12-14 16:16:23,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:23,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851932912] [2021-12-14 16:16:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:23,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:16:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:23,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:23,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851932912] [2021-12-14 16:16:23,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851932912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:23,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:23,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:23,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481510082] [2021-12-14 16:16:23,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:23,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:23,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:23,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:23,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:23,605 INFO L87 Difference]: Start difference. First operand 475 states and 703 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:23,716 INFO L93 Difference]: Finished difference Result 883 states and 1262 transitions. [2021-12-14 16:16:23,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:23,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-14 16:16:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:23,720 INFO L225 Difference]: With dead ends: 883 [2021-12-14 16:16:23,721 INFO L226 Difference]: Without dead ends: 692 [2021-12-14 16:16:23,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:23,722 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 712 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:23,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 883 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:23,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-12-14 16:16:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 640. [2021-12-14 16:16:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 570 states have (on average 1.436842105263158) internal successors, (819), 577 states have internal predecessors, (819), 46 states have call successors, (46), 21 states have call predecessors, (46), 22 states have return successors, (56), 42 states have call predecessors, (56), 44 states have call successors, (56) [2021-12-14 16:16:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 921 transitions. [2021-12-14 16:16:23,743 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 921 transitions. Word has length 45 [2021-12-14 16:16:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:23,744 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 921 transitions. [2021-12-14 16:16:23,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 921 transitions. [2021-12-14 16:16:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 16:16:23,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:23,746 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:16:23,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:16:23,746 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:23,747 INFO L85 PathProgramCache]: Analyzing trace with hash 875979578, now seen corresponding path program 1 times [2021-12-14 16:16:23,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:23,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797775339] [2021-12-14 16:16:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:23,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:16:23,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:23,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797775339] [2021-12-14 16:16:23,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797775339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:23,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:23,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:23,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816493429] [2021-12-14 16:16:23,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:23,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:23,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:23,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:23,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:23,792 INFO L87 Difference]: Start difference. First operand 640 states and 921 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:24,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:24,039 INFO L93 Difference]: Finished difference Result 984 states and 1382 transitions. [2021-12-14 16:16:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:24,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-14 16:16:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:24,043 INFO L225 Difference]: With dead ends: 984 [2021-12-14 16:16:24,043 INFO L226 Difference]: Without dead ends: 747 [2021-12-14 16:16:24,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:24,044 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 271 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:24,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1180 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:16:24,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-12-14 16:16:24,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 709. [2021-12-14 16:16:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 630 states have (on average 1.4111111111111112) internal successors, (889), 638 states have internal predecessors, (889), 51 states have call successors, (51), 24 states have call predecessors, (51), 26 states have return successors, (65), 47 states have call predecessors, (65), 49 states have call successors, (65) [2021-12-14 16:16:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1005 transitions. [2021-12-14 16:16:24,063 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1005 transitions. Word has length 62 [2021-12-14 16:16:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:24,064 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 1005 transitions. [2021-12-14 16:16:24,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1005 transitions. [2021-12-14 16:16:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 16:16:24,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:24,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:24,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:16:24,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:24,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash 263296175, now seen corresponding path program 1 times [2021-12-14 16:16:24,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:24,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216159434] [2021-12-14 16:16:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:24,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:24,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:24,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:16:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:24,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:16:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 16:16:24,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:24,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216159434] [2021-12-14 16:16:24,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216159434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:24,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:24,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:24,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162708994] [2021-12-14 16:16:24,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:24,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:24,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:24,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:24,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:24,112 INFO L87 Difference]: Start difference. First operand 709 states and 1005 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:16:24,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:24,215 INFO L93 Difference]: Finished difference Result 1260 states and 1727 transitions. [2021-12-14 16:16:24,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:24,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-14 16:16:24,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:24,219 INFO L225 Difference]: With dead ends: 1260 [2021-12-14 16:16:24,219 INFO L226 Difference]: Without dead ends: 882 [2021-12-14 16:16:24,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:24,223 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 699 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:24,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 880 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-12-14 16:16:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 827. [2021-12-14 16:16:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 735 states have (on average 1.380952380952381) internal successors, (1015), 744 states have internal predecessors, (1015), 58 states have call successors, (58), 29 states have call predecessors, (58), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2021-12-14 16:16:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1149 transitions. [2021-12-14 16:16:24,289 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1149 transitions. Word has length 67 [2021-12-14 16:16:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:24,290 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1149 transitions. [2021-12-14 16:16:24,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:16:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1149 transitions. [2021-12-14 16:16:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:16:24,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:24,291 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:16:24,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:16:24,291 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash -160972064, now seen corresponding path program 1 times [2021-12-14 16:16:24,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:24,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010830469] [2021-12-14 16:16:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:24,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:24,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:24,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:24,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:16:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:16:24,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:24,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010830469] [2021-12-14 16:16:24,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010830469] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:24,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137114676] [2021-12-14 16:16:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:24,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:24,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:24,388 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) [2021-12-14 16:16:24,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:16:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:24,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 16:16:24,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:24,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:16:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:24,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137114676] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:24,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:16:24,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-14 16:16:24,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828217996] [2021-12-14 16:16:24,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:24,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:24,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:24,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:24,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:24,699 INFO L87 Difference]: Start difference. First operand 827 states and 1149 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:24,792 INFO L93 Difference]: Finished difference Result 882 states and 1216 transitions. [2021-12-14 16:16:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:16:24,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-14 16:16:24,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:24,797 INFO L225 Difference]: With dead ends: 882 [2021-12-14 16:16:24,797 INFO L226 Difference]: Without dead ends: 879 [2021-12-14 16:16:24,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:16:24,798 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 945 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:24,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 615 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-12-14 16:16:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 826. [2021-12-14 16:16:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 735 states have (on average 1.3782312925170068) internal successors, (1013), 743 states have internal predecessors, (1013), 57 states have call successors, (57), 29 states have call predecessors, (57), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2021-12-14 16:16:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1146 transitions. [2021-12-14 16:16:24,840 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1146 transitions. Word has length 68 [2021-12-14 16:16:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:24,841 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1146 transitions. [2021-12-14 16:16:24,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1146 transitions. [2021-12-14 16:16:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 16:16:24,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:24,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:24,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:25,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:25,055 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:25,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:25,056 INFO L85 PathProgramCache]: Analyzing trace with hash -696266350, now seen corresponding path program 1 times [2021-12-14 16:16:25,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:25,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771237509] [2021-12-14 16:16:25,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:25,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:25,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:25,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:25,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:16:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:16:25,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:25,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771237509] [2021-12-14 16:16:25,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771237509] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:25,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191093926] [2021-12-14 16:16:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:25,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:25,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:25,120 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) [2021-12-14 16:16:25,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:16:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:25,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:16:25,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:25,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:16:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:25,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191093926] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:16:25,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:16:25,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-14 16:16:25,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631647818] [2021-12-14 16:16:25,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:16:25,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 16:16:25,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 16:16:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:25,597 INFO L87 Difference]: Start difference. First operand 826 states and 1146 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 16:16:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:26,614 INFO L93 Difference]: Finished difference Result 2355 states and 3143 transitions. [2021-12-14 16:16:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 16:16:26,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-14 16:16:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:26,621 INFO L225 Difference]: With dead ends: 2355 [2021-12-14 16:16:26,621 INFO L226 Difference]: Without dead ends: 1911 [2021-12-14 16:16:26,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 16:16:26,623 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 1066 mSDsluCounter, 2664 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 3317 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:26,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 3317 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:16:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-12-14 16:16:26,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1200. [2021-12-14 16:16:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1073 states have (on average 1.3383038210624418) internal successors, (1436), 1087 states have internal predecessors, (1436), 76 states have call successors, (76), 42 states have call predecessors, (76), 49 states have return successors, (107), 71 states have call predecessors, (107), 75 states have call successors, (107) [2021-12-14 16:16:26,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1619 transitions. [2021-12-14 16:16:26,669 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1619 transitions. Word has length 69 [2021-12-14 16:16:26,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:26,669 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1619 transitions. [2021-12-14 16:16:26,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 16:16:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1619 transitions. [2021-12-14 16:16:26,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 16:16:26,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:26,683 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:26,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-14 16:16:26,895 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,SelfDestructingSolverStorable7 [2021-12-14 16:16:26,896 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:26,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1233481266, now seen corresponding path program 1 times [2021-12-14 16:16:26,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:26,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514098590] [2021-12-14 16:16:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:26,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:26,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:26,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:26,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:26,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 16:16:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 16:16:26,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:26,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514098590] [2021-12-14 16:16:26,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514098590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:26,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379053003] [2021-12-14 16:16:26,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:26,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:26,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:26,960 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) [2021-12-14 16:16:26,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:16:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 16:16:27,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:27,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:27,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379053003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:27,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:27,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:27,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477200133] [2021-12-14 16:16:27,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:27,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:27,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:27,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:27,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:27,122 INFO L87 Difference]: Start difference. First operand 1200 states and 1619 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 16:16:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:27,163 INFO L93 Difference]: Finished difference Result 1844 states and 2457 transitions. [2021-12-14 16:16:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-14 16:16:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:27,167 INFO L225 Difference]: With dead ends: 1844 [2021-12-14 16:16:27,167 INFO L226 Difference]: Without dead ends: 1096 [2021-12-14 16:16:27,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:27,169 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 484 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:27,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 628 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:27,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-12-14 16:16:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1084. [2021-12-14 16:16:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 970 states have (on average 1.3391752577319587) internal successors, (1299), 984 states have internal predecessors, (1299), 69 states have call successors, (69), 37 states have call predecessors, (69), 43 states have return successors, (96), 63 states have call predecessors, (96), 68 states have call successors, (96) [2021-12-14 16:16:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1464 transitions. [2021-12-14 16:16:27,204 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1464 transitions. Word has length 88 [2021-12-14 16:16:27,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:27,204 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 1464 transitions. [2021-12-14 16:16:27,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 16:16:27,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1464 transitions. [2021-12-14 16:16:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 16:16:27,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:27,206 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:27,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:27,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:27,423 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:27,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1258930737, now seen corresponding path program 1 times [2021-12-14 16:16:27,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:27,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770544392] [2021-12-14 16:16:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:27,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:16:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 16:16:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 16:16:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 16:16:27,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:27,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770544392] [2021-12-14 16:16:27,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770544392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:27,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167151558] [2021-12-14 16:16:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:27,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:27,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:27,484 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) [2021-12-14 16:16:27,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:16:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:27,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:27,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:16:27,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:27,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167151558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:27,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:27,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:27,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721898248] [2021-12-14 16:16:27,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:27,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:27,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:27,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:27,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:27,732 INFO L87 Difference]: Start difference. First operand 1084 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 16:16:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:27,762 INFO L93 Difference]: Finished difference Result 1396 states and 1852 transitions. [2021-12-14 16:16:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:27,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-14 16:16:27,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:27,764 INFO L225 Difference]: With dead ends: 1396 [2021-12-14 16:16:27,764 INFO L226 Difference]: Without dead ends: 278 [2021-12-14 16:16:27,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:27,766 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 61 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:27,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1065 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:27,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-14 16:16:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-12-14 16:16:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 249 states have (on average 1.5582329317269077) internal successors, (388), 250 states have internal predecessors, (388), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-14 16:16:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 432 transitions. [2021-12-14 16:16:27,774 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 432 transitions. Word has length 103 [2021-12-14 16:16:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:27,774 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 432 transitions. [2021-12-14 16:16:27,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 16:16:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 432 transitions. [2021-12-14 16:16:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:16:27,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:27,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:27,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:27,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:27,992 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash 167686775, now seen corresponding path program 1 times [2021-12-14 16:16:27,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:27,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434584871] [2021-12-14 16:16:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:27,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:28,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:28,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434584871] [2021-12-14 16:16:28,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434584871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:28,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:28,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:16:28,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150136900] [2021-12-14 16:16:28,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:28,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:16:28,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:28,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:16:28,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:28,067 INFO L87 Difference]: Start difference. First operand 278 states and 432 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:28,775 INFO L93 Difference]: Finished difference Result 645 states and 1020 transitions. [2021-12-14 16:16:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:16:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-14 16:16:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:28,778 INFO L225 Difference]: With dead ends: 645 [2021-12-14 16:16:28,778 INFO L226 Difference]: Without dead ends: 376 [2021-12-14 16:16:28,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:28,779 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 728 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:28,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 777 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:16:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-12-14 16:16:28,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 278. [2021-12-14 16:16:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 249 states have (on average 1.5542168674698795) internal successors, (387), 250 states have internal predecessors, (387), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-14 16:16:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 431 transitions. [2021-12-14 16:16:28,792 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 431 transitions. Word has length 134 [2021-12-14 16:16:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:28,793 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 431 transitions. [2021-12-14 16:16:28,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 431 transitions. [2021-12-14 16:16:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:16:28,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:28,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:28,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:16:28,797 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:28,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:28,797 INFO L85 PathProgramCache]: Analyzing trace with hash -779351111, now seen corresponding path program 1 times [2021-12-14 16:16:28,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:28,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664472760] [2021-12-14 16:16:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:28,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:28,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:28,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664472760] [2021-12-14 16:16:28,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664472760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:28,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:28,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:16:28,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166496631] [2021-12-14 16:16:28,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:28,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:16:28,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:28,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:16:28,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:16:28,889 INFO L87 Difference]: Start difference. First operand 278 states and 431 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:30,363 INFO L93 Difference]: Finished difference Result 1006 states and 1598 transitions. [2021-12-14 16:16:30,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:16:30,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-14 16:16:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:30,366 INFO L225 Difference]: With dead ends: 1006 [2021-12-14 16:16:30,366 INFO L226 Difference]: Without dead ends: 745 [2021-12-14 16:16:30,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:30,367 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 1093 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:30,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1108 Valid, 1254 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:16:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-12-14 16:16:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 550. [2021-12-14 16:16:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 497 states have (on average 1.567404426559356) internal successors, (779), 499 states have internal predecessors, (779), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-12-14 16:16:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 860 transitions. [2021-12-14 16:16:30,402 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 860 transitions. Word has length 134 [2021-12-14 16:16:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:30,402 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 860 transitions. [2021-12-14 16:16:30,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 860 transitions. [2021-12-14 16:16:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:16:30,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:30,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:30,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:16:30,404 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:30,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1809112637, now seen corresponding path program 1 times [2021-12-14 16:16:30,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:30,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9891517] [2021-12-14 16:16:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:30,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:30,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:30,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:30,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:30,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:30,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:30,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:30,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9891517] [2021-12-14 16:16:30,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9891517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:30,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:30,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:30,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875153082] [2021-12-14 16:16:30,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:30,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:30,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:30,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:30,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:30,483 INFO L87 Difference]: Start difference. First operand 550 states and 860 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:32,291 INFO L93 Difference]: Finished difference Result 1659 states and 2636 transitions. [2021-12-14 16:16:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:16:32,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-14 16:16:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:32,299 INFO L225 Difference]: With dead ends: 1659 [2021-12-14 16:16:32,299 INFO L226 Difference]: Without dead ends: 1126 [2021-12-14 16:16:32,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:16:32,304 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 1111 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 2139 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:32,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 2139 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:16:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-12-14 16:16:32,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 803. [2021-12-14 16:16:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 726 states have (on average 1.5606060606060606) internal successors, (1133), 729 states have internal predecessors, (1133), 56 states have call successors, (56), 18 states have call predecessors, (56), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2021-12-14 16:16:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1250 transitions. [2021-12-14 16:16:32,344 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1250 transitions. Word has length 134 [2021-12-14 16:16:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:32,344 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1250 transitions. [2021-12-14 16:16:32,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:32,345 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1250 transitions. [2021-12-14 16:16:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:16:32,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:32,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:32,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:16:32,346 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:32,347 INFO L85 PathProgramCache]: Analyzing trace with hash -483968389, now seen corresponding path program 1 times [2021-12-14 16:16:32,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:32,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013211771] [2021-12-14 16:16:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:32,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:32,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:32,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:32,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:32,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:32,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:32,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:32,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013211771] [2021-12-14 16:16:32,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013211771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:32,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:32,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:32,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245240282] [2021-12-14 16:16:32,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:32,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:32,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:32,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:32,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:32,443 INFO L87 Difference]: Start difference. First operand 803 states and 1250 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:34,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:34,237 INFO L93 Difference]: Finished difference Result 2620 states and 4154 transitions. [2021-12-14 16:16:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:16:34,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-14 16:16:34,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:34,244 INFO L225 Difference]: With dead ends: 2620 [2021-12-14 16:16:34,244 INFO L226 Difference]: Without dead ends: 1834 [2021-12-14 16:16:34,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:16:34,247 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 1105 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 2157 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:34,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 2123 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2157 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:16:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-12-14 16:16:34,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1313. [2021-12-14 16:16:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1188 states have (on average 1.5555555555555556) internal successors, (1848), 1193 states have internal predecessors, (1848), 90 states have call successors, (90), 30 states have call predecessors, (90), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2021-12-14 16:16:34,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 2041 transitions. [2021-12-14 16:16:34,307 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 2041 transitions. Word has length 134 [2021-12-14 16:16:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:34,307 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 2041 transitions. [2021-12-14 16:16:34,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:34,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 2041 transitions. [2021-12-14 16:16:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:16:34,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:34,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:34,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:16:34,310 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash -12612039, now seen corresponding path program 1 times [2021-12-14 16:16:34,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:34,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098952054] [2021-12-14 16:16:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:34,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:34,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:34,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:34,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:34,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:34,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:34,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:34,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098952054] [2021-12-14 16:16:34,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098952054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:34,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:34,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:34,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826768006] [2021-12-14 16:16:34,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:34,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:34,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:34,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:34,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:34,400 INFO L87 Difference]: Start difference. First operand 1313 states and 2041 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:36,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:36,238 INFO L93 Difference]: Finished difference Result 4476 states and 7069 transitions. [2021-12-14 16:16:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:16:36,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-14 16:16:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:36,251 INFO L225 Difference]: With dead ends: 4476 [2021-12-14 16:16:36,252 INFO L226 Difference]: Without dead ends: 3180 [2021-12-14 16:16:36,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:16:36,257 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 1104 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:36,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 2118 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2149 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:16:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2021-12-14 16:16:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 2334. [2021-12-14 16:16:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2113 states have (on average 1.551348793185045) internal successors, (3278), 2122 states have internal predecessors, (3278), 158 states have call successors, (158), 54 states have call predecessors, (158), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-14 16:16:36,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3629 transitions. [2021-12-14 16:16:36,366 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3629 transitions. Word has length 134 [2021-12-14 16:16:36,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:36,366 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 3629 transitions. [2021-12-14 16:16:36,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:36,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3629 transitions. [2021-12-14 16:16:36,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:16:36,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:36,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:36,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:16:36,368 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:36,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1659974981, now seen corresponding path program 1 times [2021-12-14 16:16:36,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:36,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619656416] [2021-12-14 16:16:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:36,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:36,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:36,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:36,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:36,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:36,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:36,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:36,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619656416] [2021-12-14 16:16:36,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619656416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:36,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:36,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:36,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129436090] [2021-12-14 16:16:36,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:36,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:36,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:36,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:36,467 INFO L87 Difference]: Start difference. First operand 2334 states and 3629 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:38,307 INFO L93 Difference]: Finished difference Result 8187 states and 12915 transitions. [2021-12-14 16:16:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:16:38,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-14 16:16:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:38,330 INFO L225 Difference]: With dead ends: 8187 [2021-12-14 16:16:38,330 INFO L226 Difference]: Without dead ends: 5870 [2021-12-14 16:16:38,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:16:38,337 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 1175 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 1485 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:38,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1190 Valid, 1485 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:16:38,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5870 states. [2021-12-14 16:16:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5870 to 4383. [2021-12-14 16:16:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4383 states, 3970 states have (on average 1.5486146095717883) internal successors, (6148), 3987 states have internal predecessors, (6148), 294 states have call successors, (294), 102 states have call predecessors, (294), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-12-14 16:16:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4383 states to 4383 states and 6833 transitions. [2021-12-14 16:16:38,568 INFO L78 Accepts]: Start accepts. Automaton has 4383 states and 6833 transitions. Word has length 134 [2021-12-14 16:16:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:38,569 INFO L470 AbstractCegarLoop]: Abstraction has 4383 states and 6833 transitions. [2021-12-14 16:16:38,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 4383 states and 6833 transitions. [2021-12-14 16:16:38,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:16:38,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:38,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:38,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:16:38,573 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:38,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:38,574 INFO L85 PathProgramCache]: Analyzing trace with hash 503641593, now seen corresponding path program 1 times [2021-12-14 16:16:38,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:38,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798730460] [2021-12-14 16:16:38,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:38,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:38,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:38,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798730460] [2021-12-14 16:16:38,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798730460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:38,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:38,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:38,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523291834] [2021-12-14 16:16:38,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:38,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:38,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:38,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:38,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:38,683 INFO L87 Difference]: Start difference. First operand 4383 states and 6833 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:39,795 INFO L93 Difference]: Finished difference Result 10296 states and 16304 transitions. [2021-12-14 16:16:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:16:39,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-14 16:16:39,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:39,815 INFO L225 Difference]: With dead ends: 10296 [2021-12-14 16:16:39,815 INFO L226 Difference]: Without dead ends: 5930 [2021-12-14 16:16:39,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:39,825 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 794 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:39,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 1124 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:16:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5930 states. [2021-12-14 16:16:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5930 to 4383. [2021-12-14 16:16:40,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4383 states, 3970 states have (on average 1.5443324937027707) internal successors, (6131), 3987 states have internal predecessors, (6131), 294 states have call successors, (294), 102 states have call predecessors, (294), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-12-14 16:16:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4383 states to 4383 states and 6816 transitions. [2021-12-14 16:16:40,044 INFO L78 Accepts]: Start accepts. Automaton has 4383 states and 6816 transitions. Word has length 134 [2021-12-14 16:16:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:40,044 INFO L470 AbstractCegarLoop]: Abstraction has 4383 states and 6816 transitions. [2021-12-14 16:16:40,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 4383 states and 6816 transitions. [2021-12-14 16:16:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:16:40,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:40,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:40,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:16:40,047 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash -534942981, now seen corresponding path program 1 times [2021-12-14 16:16:40,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:40,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949437027] [2021-12-14 16:16:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:40,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:40,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:40,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:40,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:40,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:40,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:40,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:40,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949437027] [2021-12-14 16:16:40,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949437027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:40,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:40,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:40,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857451943] [2021-12-14 16:16:40,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:40,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:40,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:40,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:40,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:40,131 INFO L87 Difference]: Start difference. First operand 4383 states and 6816 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:42,224 INFO L93 Difference]: Finished difference Result 15592 states and 24549 transitions. [2021-12-14 16:16:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:16:42,225 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-14 16:16:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:42,258 INFO L225 Difference]: With dead ends: 15592 [2021-12-14 16:16:42,259 INFO L226 Difference]: Without dead ends: 11226 [2021-12-14 16:16:42,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:16:42,271 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 1095 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 2114 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:42,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 2102 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2114 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:16:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11226 states. [2021-12-14 16:16:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11226 to 8513. [2021-12-14 16:16:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8513 states, 7716 states have (on average 1.541601866251944) internal successors, (11895), 7749 states have internal predecessors, (11895), 566 states have call successors, (566), 198 states have call predecessors, (566), 230 states have return successors, (841), 597 states have call predecessors, (841), 566 states have call successors, (841) [2021-12-14 16:16:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8513 states to 8513 states and 13302 transitions. [2021-12-14 16:16:42,677 INFO L78 Accepts]: Start accepts. Automaton has 8513 states and 13302 transitions. Word has length 134 [2021-12-14 16:16:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:42,677 INFO L470 AbstractCegarLoop]: Abstraction has 8513 states and 13302 transitions. [2021-12-14 16:16:42,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 8513 states and 13302 transitions. [2021-12-14 16:16:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:16:42,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:42,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:42,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:16:42,684 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:42,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1786858937, now seen corresponding path program 1 times [2021-12-14 16:16:42,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:42,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872571146] [2021-12-14 16:16:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:42,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:42,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:42,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:42,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:42,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:42,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:42,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:42,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872571146] [2021-12-14 16:16:42,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872571146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:42,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:42,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:42,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366339674] [2021-12-14 16:16:42,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:42,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:42,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:42,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:42,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:42,771 INFO L87 Difference]: Start difference. First operand 8513 states and 13302 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:45,353 INFO L93 Difference]: Finished difference Result 30440 states and 48157 transitions. [2021-12-14 16:16:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:16:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-14 16:16:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:45,409 INFO L225 Difference]: With dead ends: 30440 [2021-12-14 16:16:45,409 INFO L226 Difference]: Without dead ends: 21944 [2021-12-14 16:16:45,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:16:45,431 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 1094 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 2106 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:45,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1109 Valid, 2097 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2106 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:16:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21944 states. [2021-12-14 16:16:46,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21944 to 16802. [2021-12-14 16:16:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16802 states, 15237 states have (on average 1.5400013125943428) internal successors, (23465), 15302 states have internal predecessors, (23465), 1110 states have call successors, (1110), 390 states have call predecessors, (1110), 454 states have return successors, (1903), 1173 states have call predecessors, (1903), 1110 states have call successors, (1903) [2021-12-14 16:16:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16802 states to 16802 states and 26478 transitions. [2021-12-14 16:16:46,383 INFO L78 Accepts]: Start accepts. Automaton has 16802 states and 26478 transitions. Word has length 134 [2021-12-14 16:16:46,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:46,383 INFO L470 AbstractCegarLoop]: Abstraction has 16802 states and 26478 transitions. [2021-12-14 16:16:46,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 16802 states and 26478 transitions. [2021-12-14 16:16:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:16:46,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:46,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:46,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:16:46,393 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash -355001541, now seen corresponding path program 1 times [2021-12-14 16:16:46,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:46,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489376942] [2021-12-14 16:16:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:46,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:46,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:46,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:46,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:46,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:46,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:46,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:46,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489376942] [2021-12-14 16:16:46,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489376942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:46,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:46,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:46,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202593569] [2021-12-14 16:16:46,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:46,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:46,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:46,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:46,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:46,475 INFO L87 Difference]: Start difference. First operand 16802 states and 26478 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:51,161 INFO L93 Difference]: Finished difference Result 67879 states and 107749 transitions. [2021-12-14 16:16:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:16:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-14 16:16:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:51,353 INFO L225 Difference]: With dead ends: 67879 [2021-12-14 16:16:51,353 INFO L226 Difference]: Without dead ends: 51094 [2021-12-14 16:16:51,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:16:51,409 INFO L933 BasicCegarLoop]: 673 mSDtfsCounter, 1426 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 2080 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:51,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1450 Valid, 2080 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 16:16:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51094 states. [2021-12-14 16:16:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51094 to 33251. [2021-12-14 16:16:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33251 states, 30214 states have (on average 1.5413715496127622) internal successors, (46571), 30343 states have internal predecessors, (46571), 2134 states have call successors, (2134), 774 states have call predecessors, (2134), 902 states have return successors, (4449), 2261 states have call predecessors, (4449), 2134 states have call successors, (4449) [2021-12-14 16:16:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33251 states to 33251 states and 53154 transitions. [2021-12-14 16:16:53,322 INFO L78 Accepts]: Start accepts. Automaton has 33251 states and 53154 transitions. Word has length 134 [2021-12-14 16:16:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:53,323 INFO L470 AbstractCegarLoop]: Abstraction has 33251 states and 53154 transitions. [2021-12-14 16:16:53,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 33251 states and 53154 transitions. [2021-12-14 16:16:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:16:53,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:53,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:53,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:16:53,342 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:53,343 INFO L85 PathProgramCache]: Analyzing trace with hash -978283143, now seen corresponding path program 1 times [2021-12-14 16:16:53,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:53,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718101082] [2021-12-14 16:16:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:53,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:53,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:53,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718101082] [2021-12-14 16:16:53,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718101082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:53,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:53,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:53,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027706040] [2021-12-14 16:16:53,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:53,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:53,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:53,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:53,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:53,436 INFO L87 Difference]: Start difference. First operand 33251 states and 53154 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:00,784 INFO L93 Difference]: Finished difference Result 131108 states and 211111 transitions. [2021-12-14 16:17:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:17:00,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-14 16:17:00,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:01,154 INFO L225 Difference]: With dead ends: 131108 [2021-12-14 16:17:01,154 INFO L226 Difference]: Without dead ends: 97874 [2021-12-14 16:17:01,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:17:01,255 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 1154 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 2404 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:01,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1168 Valid, 2179 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2404 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:17:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97874 states. [2021-12-14 16:17:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97874 to 66213. [2021-12-14 16:17:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66213 states, 60296 states have (on average 1.5440991110521427) internal successors, (93103), 60553 states have internal predecessors, (93103), 4118 states have call successors, (4118), 1542 states have call predecessors, (4118), 1798 states have return successors, (10935), 4373 states have call predecessors, (10935), 4118 states have call successors, (10935) [2021-12-14 16:17:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66213 states to 66213 states and 108156 transitions. [2021-12-14 16:17:05,546 INFO L78 Accepts]: Start accepts. Automaton has 66213 states and 108156 transitions. Word has length 134 [2021-12-14 16:17:05,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:05,546 INFO L470 AbstractCegarLoop]: Abstraction has 66213 states and 108156 transitions. [2021-12-14 16:17:05,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 66213 states and 108156 transitions. [2021-12-14 16:17:05,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:17:05,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:05,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:05,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:17:05,577 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:05,577 INFO L85 PathProgramCache]: Analyzing trace with hash 411010871, now seen corresponding path program 1 times [2021-12-14 16:17:05,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:05,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810131715] [2021-12-14 16:17:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:05,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:17:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:17:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:17:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:17:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:05,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:05,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810131715] [2021-12-14 16:17:05,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810131715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:05,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:05,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:05,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979492811] [2021-12-14 16:17:05,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:05,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:05,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:05,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:05,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:05,662 INFO L87 Difference]: Start difference. First operand 66213 states and 108156 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:18,865 INFO L93 Difference]: Finished difference Result 256868 states and 422463 transitions. [2021-12-14 16:17:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:17:18,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-14 16:17:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:19,769 INFO L225 Difference]: With dead ends: 256868 [2021-12-14 16:17:19,770 INFO L226 Difference]: Without dead ends: 190672 [2021-12-14 16:17:20,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:17:20,119 INFO L933 BasicCegarLoop]: 659 mSDtfsCounter, 1303 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 2066 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:20,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 2066 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2062 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:17:20,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190672 states.