./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label47+token_ring.03.cil-2.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/Problem05_label47+token_ring.03.cil-2.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 6efc92bef151ce13307933930fbf12d828dd2fc0ecd03ad5da23928a5efb5fb2 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:47:18,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:47:18,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:47:18,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:47:18,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:47:18,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:47:18,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:47:18,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:47:18,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:47:18,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:47:18,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:47:18,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:47:18,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:47:18,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:47:18,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:47:18,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:47:18,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:47:18,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:47:18,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:47:18,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:47:18,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:47:18,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:47:18,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:47:18,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:47:18,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:47:18,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:47:18,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:47:18,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:47:18,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:47:18,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:47:18,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:47:18,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:47:18,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:47:18,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:47:18,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:47:18,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:47:18,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:47:18,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:47:18,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:47:18,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:47:18,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:47:18,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:47:18,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:47:18,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:47:18,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:47:18,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:47:18,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:47:18,542 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:47:18,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:47:18,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:47:18,543 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:47:18,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:47:18,544 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:47:18,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:47:18,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:47:18,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:47:18,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:47:18,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:47:18,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:47:18,545 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:47:18,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:47:18,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:47:18,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:47:18,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:47:18,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:47:18,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:47:18,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:47:18,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:47:18,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:47:18,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:47:18,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:47:18,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:47:18,547 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:47:18,547 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:47:18,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:47:18,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:47:18,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6efc92bef151ce13307933930fbf12d828dd2fc0ecd03ad5da23928a5efb5fb2 [2021-12-14 15:47:18,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:47:18,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:47:18,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:47:18,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:47:18,736 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:47:18,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label47+token_ring.03.cil-2.c [2021-12-14 15:47:18,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/352baf26d/74b9f33ecb4a4b52ad8b5e5e02f035c2/FLAGb3e61ca36 [2021-12-14 15:47:19,428 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:47:19,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.03.cil-2.c [2021-12-14 15:47:19,465 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/352baf26d/74b9f33ecb4a4b52ad8b5e5e02f035c2/FLAGb3e61ca36 [2021-12-14 15:47:19,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/352baf26d/74b9f33ecb4a4b52ad8b5e5e02f035c2 [2021-12-14 15:47:19,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:47:19,514 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:47:19,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:47:19,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:47:19,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:47:19,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:47:19" (1/1) ... [2021-12-14 15:47:19,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ffc3d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:19, skipping insertion in model container [2021-12-14 15:47:19,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:47:19" (1/1) ... [2021-12-14 15:47:19,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:47:19,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:47:20,857 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/Problem05_label47+token_ring.03.cil-2.c[377612,377625] [2021-12-14 15:47:20,885 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/Problem05_label47+token_ring.03.cil-2.c[383339,383352] [2021-12-14 15:47:21,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:47:21,009 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:47:21,574 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/Problem05_label47+token_ring.03.cil-2.c[377612,377625] [2021-12-14 15:47:21,579 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/Problem05_label47+token_ring.03.cil-2.c[383339,383352] [2021-12-14 15:47:21,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:47:21,633 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:47:21,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:21 WrapperNode [2021-12-14 15:47:21,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:47:21,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:47:21,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:47:21,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:47:21,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:21" (1/1) ... [2021-12-14 15:47:21,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:21" (1/1) ... [2021-12-14 15:47:21,980 INFO L137 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2021-12-14 15:47:21,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:47:21,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:47:21,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:47:21,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:47:21,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:21" (1/1) ... [2021-12-14 15:47:21,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:21" (1/1) ... [2021-12-14 15:47:22,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:21" (1/1) ... [2021-12-14 15:47:22,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:21" (1/1) ... [2021-12-14 15:47:22,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:21" (1/1) ... [2021-12-14 15:47:22,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:21" (1/1) ... [2021-12-14 15:47:22,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:21" (1/1) ... [2021-12-14 15:47:22,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:47:22,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:47:22,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:47:22,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:47:22,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:21" (1/1) ... [2021-12-14 15:47:22,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:47:22,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:22,403 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 15:47:22,421 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 15:47:22,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:47:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-14 15:47:22,432 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-14 15:47:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 15:47:22,432 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 15:47:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-14 15:47:22,432 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-14 15:47:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-14 15:47:22,433 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-14 15:47:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-14 15:47:22,433 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-14 15:47:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-14 15:47:22,433 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-14 15:47:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:47:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:47:22,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:47:22,562 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:47:22,563 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:47:27,341 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:47:27,358 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:47:27,359 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-14 15:47:27,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:47:27 BoogieIcfgContainer [2021-12-14 15:47:27,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:47:27,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:47:27,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:47:27,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:47:27,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:47:19" (1/3) ... [2021-12-14 15:47:27,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41891437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:47:27, skipping insertion in model container [2021-12-14 15:47:27,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:21" (2/3) ... [2021-12-14 15:47:27,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41891437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:47:27, skipping insertion in model container [2021-12-14 15:47:27,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:47:27" (3/3) ... [2021-12-14 15:47:27,369 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.03.cil-2.c [2021-12-14 15:47:27,372 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:47:27,372 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 15:47:27,415 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:47:27,421 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 15:47:27,421 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 15:47:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-14 15:47:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:47:27,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:27,482 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] [2021-12-14 15:47:27,484 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash 200056068, now seen corresponding path program 1 times [2021-12-14 15:47:27,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:27,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672948408] [2021-12-14 15:47:27,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:27,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,765 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 15:47:27,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:27,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672948408] [2021-12-14 15:47:27,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672948408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:27,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:27,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:47:27,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600726057] [2021-12-14 15:47:27,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:27,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:47:27,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:47:27,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:47:27,792 INFO L87 Difference]: Start difference. First operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 15:47:28,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:28,724 INFO L93 Difference]: Finished difference Result 4899 states and 9012 transitions. [2021-12-14 15:47:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:47:28,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 79 [2021-12-14 15:47:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:28,744 INFO L225 Difference]: With dead ends: 4899 [2021-12-14 15:47:28,744 INFO L226 Difference]: Without dead ends: 2500 [2021-12-14 15:47:28,750 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 15:47:28,753 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4543 mSDsluCounter, 12503 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 16790 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:28,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 16790 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:47:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-12-14 15:47:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2415. [2021-12-14 15:47:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2371 states have (on average 1.8291859974694222) internal successors, (4337), 2374 states have internal predecessors, (4337), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-14 15:47:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4398 transitions. [2021-12-14 15:47:28,841 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4398 transitions. Word has length 79 [2021-12-14 15:47:28,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:28,841 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4398 transitions. [2021-12-14 15:47:28,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 15:47:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4398 transitions. [2021-12-14 15:47:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:47:28,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:28,845 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] [2021-12-14 15:47:28,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:47:28,845 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:28,846 INFO L85 PathProgramCache]: Analyzing trace with hash 437104264, now seen corresponding path program 1 times [2021-12-14 15:47:28,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:28,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425578371] [2021-12-14 15:47:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:28,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:28,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:28,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:28,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:28,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:28,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:47:28,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:28,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425578371] [2021-12-14 15:47:28,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425578371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:28,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:28,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:47:28,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90000054] [2021-12-14 15:47:28,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:28,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:47:28,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:28,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:47:28,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:47:28,977 INFO L87 Difference]: Start difference. First operand 2415 states and 4398 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:29,444 INFO L93 Difference]: Finished difference Result 2787 states and 4973 transitions. [2021-12-14 15:47:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:47:29,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-14 15:47:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:29,452 INFO L225 Difference]: With dead ends: 2787 [2021-12-14 15:47:29,453 INFO L226 Difference]: Without dead ends: 2504 [2021-12-14 15:47:29,454 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 15:47:29,455 INFO L933 BasicCegarLoop]: 4180 mSDtfsCounter, 4337 mSDsluCounter, 16192 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4348 SdHoareTripleChecker+Valid, 20372 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:29,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4348 Valid, 20372 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 15:47:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-12-14 15:47:29,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2415. [2021-12-14 15:47:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2371 states have (on average 1.8283424715309995) internal successors, (4335), 2374 states have internal predecessors, (4335), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-14 15:47:29,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4396 transitions. [2021-12-14 15:47:29,501 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4396 transitions. Word has length 79 [2021-12-14 15:47:29,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:29,502 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4396 transitions. [2021-12-14 15:47:29,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:29,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4396 transitions. [2021-12-14 15:47:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:47:29,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:29,504 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] [2021-12-14 15:47:29,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:47:29,505 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash 382711366, now seen corresponding path program 1 times [2021-12-14 15:47:29,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911734768] [2021-12-14 15:47:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:29,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:29,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:29,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:29,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:29,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:29,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:29,582 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 15:47:29,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:29,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911734768] [2021-12-14 15:47:29,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911734768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:29,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:29,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:47:29,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761966017] [2021-12-14 15:47:29,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:29,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:47:29,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:29,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:47:29,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:47:29,585 INFO L87 Difference]: Start difference. First operand 2415 states and 4396 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:30,537 INFO L93 Difference]: Finished difference Result 2965 states and 5230 transitions. [2021-12-14 15:47:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:47:30,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-14 15:47:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:30,546 INFO L225 Difference]: With dead ends: 2965 [2021-12-14 15:47:30,547 INFO L226 Difference]: Without dead ends: 2682 [2021-12-14 15:47:30,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:47:30,549 INFO L933 BasicCegarLoop]: 4314 mSDtfsCounter, 4460 mSDsluCounter, 16595 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4470 SdHoareTripleChecker+Valid, 20909 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:30,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4470 Valid, 20909 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 15:47:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-12-14 15:47:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2548. [2021-12-14 15:47:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2485 states have (on average 1.8120724346076458) internal successors, (4503), 2489 states have internal predecessors, (4503), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2021-12-14 15:47:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 4590 transitions. [2021-12-14 15:47:30,604 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 4590 transitions. Word has length 79 [2021-12-14 15:47:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:30,604 INFO L470 AbstractCegarLoop]: Abstraction has 2548 states and 4590 transitions. [2021-12-14 15:47:30,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 4590 transitions. [2021-12-14 15:47:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:47:30,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:30,606 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] [2021-12-14 15:47:30,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:47:30,606 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:30,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:30,607 INFO L85 PathProgramCache]: Analyzing trace with hash -34685240, now seen corresponding path program 1 times [2021-12-14 15:47:30,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:30,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647495325] [2021-12-14 15:47:30,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:30,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,682 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 15:47:30,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:30,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647495325] [2021-12-14 15:47:30,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647495325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:30,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:30,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:47:30,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544909742] [2021-12-14 15:47:30,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:30,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:47:30,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:30,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:47:30,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:47:30,685 INFO L87 Difference]: Start difference. First operand 2548 states and 4590 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:31,590 INFO L93 Difference]: Finished difference Result 3444 states and 5944 transitions. [2021-12-14 15:47:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:47:31,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-14 15:47:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:31,600 INFO L225 Difference]: With dead ends: 3444 [2021-12-14 15:47:31,600 INFO L226 Difference]: Without dead ends: 3028 [2021-12-14 15:47:31,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:47:31,603 INFO L933 BasicCegarLoop]: 4306 mSDtfsCounter, 4457 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4467 SdHoareTripleChecker+Valid, 20897 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:31,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4467 Valid, 20897 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:47:31,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-12-14 15:47:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 2816. [2021-12-14 15:47:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2715 states have (on average 1.7834254143646409) internal successors, (4842), 2721 states have internal predecessors, (4842), 65 states have call successors, (65), 30 states have call predecessors, (65), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2021-12-14 15:47:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 4985 transitions. [2021-12-14 15:47:31,676 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 4985 transitions. Word has length 79 [2021-12-14 15:47:31,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:31,676 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 4985 transitions. [2021-12-14 15:47:31,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:31,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 4985 transitions. [2021-12-14 15:47:31,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:47:31,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:31,678 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] [2021-12-14 15:47:31,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:47:31,678 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:31,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:31,679 INFO L85 PathProgramCache]: Analyzing trace with hash 644587014, now seen corresponding path program 1 times [2021-12-14 15:47:31,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:31,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981197731] [2021-12-14 15:47:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:31,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,747 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 15:47:31,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981197731] [2021-12-14 15:47:31,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981197731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:31,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:31,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:47:31,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615116297] [2021-12-14 15:47:31,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:31,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:47:31,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:31,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:47:31,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:47:31,749 INFO L87 Difference]: Start difference. First operand 2816 states and 4985 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:32,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:32,729 INFO L93 Difference]: Finished difference Result 4578 states and 7629 transitions. [2021-12-14 15:47:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:47:32,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-14 15:47:32,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:32,742 INFO L225 Difference]: With dead ends: 4578 [2021-12-14 15:47:32,742 INFO L226 Difference]: Without dead ends: 3894 [2021-12-14 15:47:32,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:47:32,745 INFO L933 BasicCegarLoop]: 4300 mSDtfsCounter, 4588 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4602 SdHoareTripleChecker+Valid, 20883 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:32,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4602 Valid, 20883 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:47:32,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-12-14 15:47:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3342. [2021-12-14 15:47:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3169 states have (on average 1.7399810665825182) internal successors, (5514), 3179 states have internal predecessors, (5514), 109 states have call successors, (109), 54 states have call predecessors, (109), 62 states have return successors, (144), 116 states have call predecessors, (144), 109 states have call successors, (144) [2021-12-14 15:47:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 5767 transitions. [2021-12-14 15:47:32,837 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 5767 transitions. Word has length 79 [2021-12-14 15:47:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:32,837 INFO L470 AbstractCegarLoop]: Abstraction has 3342 states and 5767 transitions. [2021-12-14 15:47:32,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 5767 transitions. [2021-12-14 15:47:32,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:47:32,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:32,839 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] [2021-12-14 15:47:32,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:47:32,839 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1688805624, now seen corresponding path program 1 times [2021-12-14 15:47:32,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:32,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176981976] [2021-12-14 15:47:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:32,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,904 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 15:47:32,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:32,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176981976] [2021-12-14 15:47:32,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176981976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:32,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:32,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:47:32,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242140484] [2021-12-14 15:47:32,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:32,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:47:32,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:32,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:47:32,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:47:32,907 INFO L87 Difference]: Start difference. First operand 3342 states and 5767 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:33,972 INFO L93 Difference]: Finished difference Result 6510 states and 10517 transitions. [2021-12-14 15:47:33,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:47:33,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-14 15:47:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:33,991 INFO L225 Difference]: With dead ends: 6510 [2021-12-14 15:47:33,991 INFO L226 Difference]: Without dead ends: 5300 [2021-12-14 15:47:33,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:47:33,997 INFO L933 BasicCegarLoop]: 4337 mSDtfsCounter, 4474 mSDsluCounter, 16580 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4483 SdHoareTripleChecker+Valid, 20917 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:33,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4483 Valid, 20917 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:47:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2021-12-14 15:47:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 4348. [2021-12-14 15:47:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4035 states have (on average 1.6837670384138785) internal successors, (6794), 4053 states have internal predecessors, (6794), 193 states have call successors, (193), 102 states have call predecessors, (193), 118 states have return successors, (290), 208 states have call predecessors, (290), 193 states have call successors, (290) [2021-12-14 15:47:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 7277 transitions. [2021-12-14 15:47:34,111 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 7277 transitions. Word has length 79 [2021-12-14 15:47:34,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:34,111 INFO L470 AbstractCegarLoop]: Abstraction has 4348 states and 7277 transitions. [2021-12-14 15:47:34,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 7277 transitions. [2021-12-14 15:47:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:47:34,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:34,114 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] [2021-12-14 15:47:34,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:47:34,114 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:34,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:34,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1486981690, now seen corresponding path program 1 times [2021-12-14 15:47:34,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:34,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590195910] [2021-12-14 15:47:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:34,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,190 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 15:47:34,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:34,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590195910] [2021-12-14 15:47:34,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590195910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:34,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:34,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:47:34,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817575457] [2021-12-14 15:47:34,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:34,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:47:34,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:34,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:47:34,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:47:34,192 INFO L87 Difference]: Start difference. First operand 4348 states and 7277 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:35,050 INFO L93 Difference]: Finished difference Result 9866 states and 15579 transitions. [2021-12-14 15:47:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:47:35,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-14 15:47:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:35,079 INFO L225 Difference]: With dead ends: 9866 [2021-12-14 15:47:35,079 INFO L226 Difference]: Without dead ends: 7650 [2021-12-14 15:47:35,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:47:35,089 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4465 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4479 SdHoareTripleChecker+Valid, 20870 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:35,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4479 Valid, 20870 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 15:47:35,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2021-12-14 15:47:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 6407. [2021-12-14 15:47:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6407 states, 5822 states have (on average 1.6241841291652352) internal successors, (9456), 5856 states have internal predecessors, (9456), 353 states have call successors, (353), 198 states have call predecessors, (353), 230 states have return successors, (628), 384 states have call predecessors, (628), 353 states have call successors, (628) [2021-12-14 15:47:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6407 states to 6407 states and 10437 transitions. [2021-12-14 15:47:35,265 INFO L78 Accepts]: Start accepts. Automaton has 6407 states and 10437 transitions. Word has length 79 [2021-12-14 15:47:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:35,265 INFO L470 AbstractCegarLoop]: Abstraction has 6407 states and 10437 transitions. [2021-12-14 15:47:35,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand 6407 states and 10437 transitions. [2021-12-14 15:47:35,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:47:35,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:35,270 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] [2021-12-14 15:47:35,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:47:35,270 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:35,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:35,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1053252604, now seen corresponding path program 1 times [2021-12-14 15:47:35,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:35,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779111862] [2021-12-14 15:47:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:35,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:35,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:35,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:35,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:35,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:35,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:35,330 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 15:47:35,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:35,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779111862] [2021-12-14 15:47:35,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779111862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:35,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:35,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:47:35,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038124315] [2021-12-14 15:47:35,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:35,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:47:35,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:35,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:47:35,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:47:35,332 INFO L87 Difference]: Start difference. First operand 6407 states and 10437 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 15:47:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:36,287 INFO L93 Difference]: Finished difference Result 14332 states and 22441 transitions. [2021-12-14 15:47:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:47:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 79 [2021-12-14 15:47:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:36,325 INFO L225 Difference]: With dead ends: 14332 [2021-12-14 15:47:36,325 INFO L226 Difference]: Without dead ends: 10058 [2021-12-14 15:47:36,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-14 15:47:36,341 INFO L933 BasicCegarLoop]: 4385 mSDtfsCounter, 4628 mSDsluCounter, 12345 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4655 SdHoareTripleChecker+Valid, 16730 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:36,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4655 Valid, 16730 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 15:47:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10058 states. [2021-12-14 15:47:36,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10058 to 8576. [2021-12-14 15:47:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8576 states, 7684 states have (on average 1.5802967204580947) internal successors, (12143), 7751 states have internal predecessors, (12143), 542 states have call successors, (542), 300 states have call predecessors, (542), 348 states have return successors, (899), 556 states have call predecessors, (899), 542 states have call successors, (899) [2021-12-14 15:47:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8576 states to 8576 states and 13584 transitions. [2021-12-14 15:47:36,605 INFO L78 Accepts]: Start accepts. Automaton has 8576 states and 13584 transitions. Word has length 79 [2021-12-14 15:47:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:36,605 INFO L470 AbstractCegarLoop]: Abstraction has 8576 states and 13584 transitions. [2021-12-14 15:47:36,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 15:47:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 8576 states and 13584 transitions. [2021-12-14 15:47:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-14 15:47:36,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:36,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:47:36,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:47:36,620 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:36,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1451529571, now seen corresponding path program 1 times [2021-12-14 15:47:36,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:36,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338201295] [2021-12-14 15:47:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:36,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 15:47:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:47:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:47:36,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:36,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338201295] [2021-12-14 15:47:36,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338201295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:36,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303904348] [2021-12-14 15:47:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:36,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:36,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:36,736 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 15:47:36,739 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 15:47:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:47:36,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 15:47:37,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:37,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303904348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:37,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:37,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:47:37,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631619542] [2021-12-14 15:47:37,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:37,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:37,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:37,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:37,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:37,004 INFO L87 Difference]: Start difference. First operand 8576 states and 13584 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 15:47:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:37,378 INFO L93 Difference]: Finished difference Result 21283 states and 32724 transitions. [2021-12-14 15:47:37,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:37,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-14 15:47:37,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:37,429 INFO L225 Difference]: With dead ends: 21283 [2021-12-14 15:47:37,430 INFO L226 Difference]: Without dead ends: 14840 [2021-12-14 15:47:37,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:37,446 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4135 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4135 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:37,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4135 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14840 states. [2021-12-14 15:47:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14840 to 14738. [2021-12-14 15:47:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14738 states, 12986 states have (on average 1.5333436008008625) internal successors, (19912), 13118 states have internal predecessors, (19912), 1054 states have call successors, (1054), 600 states have call predecessors, (1054), 696 states have return successors, (1737), 1051 states have call predecessors, (1737), 1054 states have call successors, (1737) [2021-12-14 15:47:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14738 states to 14738 states and 22703 transitions. [2021-12-14 15:47:37,835 INFO L78 Accepts]: Start accepts. Automaton has 14738 states and 22703 transitions. Word has length 128 [2021-12-14 15:47:37,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:37,835 INFO L470 AbstractCegarLoop]: Abstraction has 14738 states and 22703 transitions. [2021-12-14 15:47:37,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 15:47:37,836 INFO L276 IsEmpty]: Start isEmpty. Operand 14738 states and 22703 transitions. [2021-12-14 15:47:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-14 15:47:37,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:37,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:47:37,896 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 15:47:38,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:38,075 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1829435325, now seen corresponding path program 1 times [2021-12-14 15:47:38,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:38,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973862345] [2021-12-14 15:47:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:38,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:38,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:38,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:38,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:38,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:38,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:38,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 15:47:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:38,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:38,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:47:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:47:38,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973862345] [2021-12-14 15:47:38,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973862345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154218254] [2021-12-14 15:47:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:38,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:38,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:38,168 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 15:47:38,197 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 15:47:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:38,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:47:38,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 15:47:38,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:38,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154218254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:38,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:38,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:47:38,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806051527] [2021-12-14 15:47:38,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:38,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:38,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:38,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:38,403 INFO L87 Difference]: Start difference. First operand 14738 states and 22703 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 15:47:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:39,062 INFO L93 Difference]: Finished difference Result 39591 states and 60013 transitions. [2021-12-14 15:47:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:39,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-14 15:47:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:39,199 INFO L225 Difference]: With dead ends: 39591 [2021-12-14 15:47:39,199 INFO L226 Difference]: Without dead ends: 26986 [2021-12-14 15:47:39,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:39,230 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4129 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4129 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:39,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4129 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:39,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26986 states. [2021-12-14 15:47:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26986 to 26784. [2021-12-14 15:47:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26784 states, 23338 states have (on average 1.501756791498843) internal successors, (35048), 23600 states have internal predecessors, (35048), 2052 states have call successors, (2052), 1200 states have call predecessors, (2052), 1392 states have return successors, (3387), 2015 states have call predecessors, (3387), 2052 states have call successors, (3387) [2021-12-14 15:47:40,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26784 states to 26784 states and 40487 transitions. [2021-12-14 15:47:40,186 INFO L78 Accepts]: Start accepts. Automaton has 26784 states and 40487 transitions. Word has length 128 [2021-12-14 15:47:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:40,187 INFO L470 AbstractCegarLoop]: Abstraction has 26784 states and 40487 transitions. [2021-12-14 15:47:40,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 15:47:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 26784 states and 40487 transitions. [2021-12-14 15:47:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-14 15:47:40,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:40,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:47:40,261 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 15:47:40,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 15:47:40,463 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1038951203, now seen corresponding path program 1 times [2021-12-14 15:47:40,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:40,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097725738] [2021-12-14 15:47:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:40,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:40,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:40,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:40,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:40,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:40,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:40,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 15:47:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:40,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:40,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:47:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:47:40,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:40,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097725738] [2021-12-14 15:47:40,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097725738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:40,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420463839] [2021-12-14 15:47:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:40,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:40,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:40,551 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 15:47:40,595 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 15:47:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:40,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:47:40,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 15:47:40,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:40,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420463839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:40,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:40,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:40,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567239562] [2021-12-14 15:47:40,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:40,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:40,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:40,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:40,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:40,800 INFO L87 Difference]: Start difference. First operand 26784 states and 40487 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 15:47:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:42,018 INFO L93 Difference]: Finished difference Result 75073 states and 113309 transitions. [2021-12-14 15:47:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:42,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2021-12-14 15:47:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:42,218 INFO L225 Difference]: With dead ends: 75073 [2021-12-14 15:47:42,218 INFO L226 Difference]: Without dead ends: 50423 [2021-12-14 15:47:42,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:42,273 INFO L933 BasicCegarLoop]: 4380 mSDtfsCounter, 193 mSDsluCounter, 4179 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 8559 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:42,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 8559 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50423 states. [2021-12-14 15:47:43,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50423 to 50423. [2021-12-14 15:47:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50423 states, 43670 states have (on average 1.477329974811083) internal successors, (64515), 44125 states have internal predecessors, (64515), 3967 states have call successors, (3967), 2400 states have call predecessors, (3967), 2784 states have return successors, (7350), 3961 states have call predecessors, (7350), 3967 states have call successors, (7350) [2021-12-14 15:47:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50423 states to 50423 states and 75832 transitions. [2021-12-14 15:47:43,814 INFO L78 Accepts]: Start accepts. Automaton has 50423 states and 75832 transitions. Word has length 128 [2021-12-14 15:47:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:43,816 INFO L470 AbstractCegarLoop]: Abstraction has 50423 states and 75832 transitions. [2021-12-14 15:47:43,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 15:47:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 50423 states and 75832 transitions. [2021-12-14 15:47:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-14 15:47:43,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:43,934 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:47:43,964 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 15:47:44,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:44,152 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:44,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291405, now seen corresponding path program 1 times [2021-12-14 15:47:44,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:44,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474296924] [2021-12-14 15:47:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:44,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:44,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:44,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:44,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:44,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:44,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:44,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 15:47:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:44,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:44,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 15:47:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:44,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:44,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 15:47:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 15:47:44,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:44,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474296924] [2021-12-14 15:47:44,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474296924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:44,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921083786] [2021-12-14 15:47:44,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:44,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:44,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:44,268 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 15:47:44,269 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 15:47:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:44,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:47:44,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 15:47:44,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:44,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921083786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:44,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:44,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:47:44,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872188299] [2021-12-14 15:47:44,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:44,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:44,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:44,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:44,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:44,654 INFO L87 Difference]: Start difference. First operand 50423 states and 75832 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 15:47:47,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:47,401 INFO L93 Difference]: Finished difference Result 144551 states and 217323 transitions. [2021-12-14 15:47:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:47,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2021-12-14 15:47:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:47,702 INFO L225 Difference]: With dead ends: 144551 [2021-12-14 15:47:47,703 INFO L226 Difference]: Without dead ends: 96267 [2021-12-14 15:47:47,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:47,828 INFO L933 BasicCegarLoop]: 4200 mSDtfsCounter, 4085 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4085 SdHoareTripleChecker+Valid, 4397 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:47,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4085 Valid, 4397 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96267 states. [2021-12-14 15:47:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96267 to 95465. [2021-12-14 15:47:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95465 states, 82660 states have (on average 1.4675175417372368) internal successors, (121305), 83567 states have internal predecessors, (121305), 7381 states have call successors, (7381), 4654 states have call predecessors, (7381), 5422 states have return successors, (13774), 7307 states have call predecessors, (13774), 7381 states have call successors, (13774) [2021-12-14 15:47:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95465 states to 95465 states and 142460 transitions. [2021-12-14 15:47:51,835 INFO L78 Accepts]: Start accepts. Automaton has 95465 states and 142460 transitions. Word has length 166 [2021-12-14 15:47:51,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:51,851 INFO L470 AbstractCegarLoop]: Abstraction has 95465 states and 142460 transitions. [2021-12-14 15:47:51,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 15:47:51,852 INFO L276 IsEmpty]: Start isEmpty. Operand 95465 states and 142460 transitions. [2021-12-14 15:47:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-14 15:47:52,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:52,249 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:47:52,268 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 15:47:52,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:52,466 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:52,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:52,467 INFO L85 PathProgramCache]: Analyzing trace with hash 399987983, now seen corresponding path program 1 times [2021-12-14 15:47:52,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:52,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681415753] [2021-12-14 15:47:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:52,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 15:47:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 15:47:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-14 15:47:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-14 15:47:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-14 15:47:52,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:52,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681415753] [2021-12-14 15:47:52,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681415753] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:52,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648871498] [2021-12-14 15:47:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:52,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:52,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:52,584 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:47:52,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 15:47:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:47:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 15:47:52,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:52,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648871498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:52,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:52,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:52,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035045682] [2021-12-14 15:47:52,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:52,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:52,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:52,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:52,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:52,974 INFO L87 Difference]: Start difference. First operand 95465 states and 142460 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 15:47:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:55,702 INFO L93 Difference]: Finished difference Result 146177 states and 218203 transitions. [2021-12-14 15:47:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:55,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2021-12-14 15:47:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:55,981 INFO L225 Difference]: With dead ends: 146177 [2021-12-14 15:47:55,982 INFO L226 Difference]: Without dead ends: 81821 [2021-12-14 15:47:56,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:56,125 INFO L933 BasicCegarLoop]: 4177 mSDtfsCounter, 4107 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4107 SdHoareTripleChecker+Valid, 4221 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:56,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4107 Valid, 4221 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:56,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81821 states. [2021-12-14 15:47:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81821 to 59061. [2021-12-14 15:47:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59061 states, 51472 states have (on average 1.4258043207957725) internal successors, (73389), 51935 states have internal predecessors, (73389), 4297 states have call successors, (4297), 2906 states have call predecessors, (4297), 3290 states have return successors, (6802), 4251 states have call predecessors, (6802), 4297 states have call successors, (6802) [2021-12-14 15:47:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59061 states to 59061 states and 84488 transitions. [2021-12-14 15:47:58,681 INFO L78 Accepts]: Start accepts. Automaton has 59061 states and 84488 transitions. Word has length 184 [2021-12-14 15:47:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:58,682 INFO L470 AbstractCegarLoop]: Abstraction has 59061 states and 84488 transitions. [2021-12-14 15:47:58,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 15:47:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 59061 states and 84488 transitions. [2021-12-14 15:47:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-14 15:47:58,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:58,784 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:47:58,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 15:47:59,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 15:47:59,001 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:59,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1248051052, now seen corresponding path program 1 times [2021-12-14 15:47:59,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:59,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177759073] [2021-12-14 15:47:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:59,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:47:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:47:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:47:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:47:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 15:47:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 15:47:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-14 15:47:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-14 15:47:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-14 15:47:59,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177759073] [2021-12-14 15:47:59,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177759073] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719697382] [2021-12-14 15:47:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:59,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:59,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:59,103 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:47:59,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 15:47:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:47:59,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-14 15:47:59,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:59,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719697382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:59,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:59,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:59,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617085285] [2021-12-14 15:47:59,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:59,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:59,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:59,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:59,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:59,455 INFO L87 Difference]: Start difference. First operand 59061 states and 84488 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:48:01,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:48:01,578 INFO L93 Difference]: Finished difference Result 102084 states and 144765 transitions. [2021-12-14 15:48:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:48:01,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 184 [2021-12-14 15:48:01,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:48:01,768 INFO L225 Difference]: With dead ends: 102084 [2021-12-14 15:48:01,768 INFO L226 Difference]: Without dead ends: 63143 [2021-12-14 15:48:01,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:48:01,957 INFO L933 BasicCegarLoop]: 4200 mSDtfsCounter, 4119 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4119 SdHoareTripleChecker+Valid, 4406 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:48:01,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4119 Valid, 4406 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:48:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63143 states. [2021-12-14 15:48:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63143 to 62959. [2021-12-14 15:48:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62959 states, 55022 states have (on average 1.3992766529751737) internal successors, (76991), 55485 states have internal predecessors, (76991), 4395 states have call successors, (4395), 3156 states have call predecessors, (4395), 3540 states have return successors, (7150), 4349 states have call predecessors, (7150), 4395 states have call successors, (7150) [2021-12-14 15:48:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62959 states to 62959 states and 88536 transitions. [2021-12-14 15:48:04,479 INFO L78 Accepts]: Start accepts. Automaton has 62959 states and 88536 transitions. Word has length 184 [2021-12-14 15:48:04,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:48:04,479 INFO L470 AbstractCegarLoop]: Abstraction has 62959 states and 88536 transitions. [2021-12-14 15:48:04,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:48:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 62959 states and 88536 transitions. [2021-12-14 15:48:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-14 15:48:04,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:48:04,575 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:48:04,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 15:48:04,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:48:04,792 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:48:04,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:48:04,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2008494395, now seen corresponding path program 1 times [2021-12-14 15:48:04,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:48:04,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216016243] [2021-12-14 15:48:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:04,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:48:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:48:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:48:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 15:48:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:48:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 15:48:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 15:48:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 15:48:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-14 15:48:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-14 15:48:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-14 15:48:04,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:48:04,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216016243] [2021-12-14 15:48:04,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216016243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:48:04,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310471163] [2021-12-14 15:48:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:04,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:48:04,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:48:04,889 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:48:04,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 15:48:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:48:04,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:48:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-14 15:48:05,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:48:05,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310471163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:48:05,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:48:05,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:48:05,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175880942] [2021-12-14 15:48:05,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:48:05,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:48:05,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:48:05,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:48:05,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:48:05,226 INFO L87 Difference]: Start difference. First operand 62959 states and 88536 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11)