./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF --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 78201c5527fd684bbb5ce3426a0df19562cff65b8fe2040ac04671f6137326c6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:05:46,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:05:46,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:05:46,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:05:46,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:05:46,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:05:46,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:05:46,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:05:46,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:05:46,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:05:46,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:05:46,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:05:46,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:05:46,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:05:46,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:05:46,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:05:46,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:05:46,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:05:46,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:05:46,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:05:46,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:05:46,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:05:46,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:05:46,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:05:46,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:05:46,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:05:46,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:05:46,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:05:46,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:05:46,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:05:46,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:05:46,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:05:46,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:05:46,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:05:46,657 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:05:46,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:05:46,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:05:46,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:05:46,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:05:46,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:05:46,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:05:46,667 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:05:46,724 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:05:46,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:05:46,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:05:46,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:05:46,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:05:46,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:05:46,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:05:46,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:05:46,737 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:05:46,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:05:46,739 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:05:46,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:05:46,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:05:46,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:05:46,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:05:46,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:05:46,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:05:46,741 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:05:46,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:05:46,742 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:05:46,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:05:46,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:05:46,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:05:46,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:05:46,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:05:46,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:05:46,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:05:46,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:05:46,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:05:46,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:05:46,749 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:05:46,749 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:05:46,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:05:46,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:05:46,750 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78201c5527fd684bbb5ce3426a0df19562cff65b8fe2040ac04671f6137326c6 [2021-11-20 06:05:47,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:05:47,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:05:47,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:05:47,140 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:05:47,141 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:05:47,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2021-11-20 06:05:47,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/data/7f20a8f54/2889cc77ebf948299c10153fd1920e85/FLAG68093930a [2021-11-20 06:05:47,947 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:05:47,955 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2021-11-20 06:05:47,975 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/data/7f20a8f54/2889cc77ebf948299c10153fd1920e85/FLAG68093930a [2021-11-20 06:05:48,236 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/data/7f20a8f54/2889cc77ebf948299c10153fd1920e85 [2021-11-20 06:05:48,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:05:48,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:05:48,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:05:48,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:05:48,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:05:48,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:05:48" (1/1) ... [2021-11-20 06:05:48,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b41861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48, skipping insertion in model container [2021-11-20 06:05:48,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:05:48" (1/1) ... [2021-11-20 06:05:48,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:05:48,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:05:48,587 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[913,926] [2021-11-20 06:05:48,641 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[5977,5990] [2021-11-20 06:05:48,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:05:48,763 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:05:48,787 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[913,926] [2021-11-20 06:05:48,815 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[5977,5990] [2021-11-20 06:05:48,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:05:48,932 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:05:48,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48 WrapperNode [2021-11-20 06:05:48,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:05:48,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:05:48,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:05:48,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:05:48,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48" (1/1) ... [2021-11-20 06:05:48,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48" (1/1) ... [2021-11-20 06:05:49,055 INFO L137 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 939 [2021-11-20 06:05:49,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:05:49,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:05:49,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:05:49,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:05:49,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48" (1/1) ... [2021-11-20 06:05:49,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48" (1/1) ... [2021-11-20 06:05:49,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48" (1/1) ... [2021-11-20 06:05:49,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48" (1/1) ... [2021-11-20 06:05:49,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48" (1/1) ... [2021-11-20 06:05:49,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48" (1/1) ... [2021-11-20 06:05:49,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48" (1/1) ... [2021-11-20 06:05:49,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:05:49,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:05:49,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:05:49,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:05:49,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48" (1/1) ... [2021-11-20 06:05:49,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:05:49,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:49,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:05:49,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:05:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:05:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-20 06:05:49,263 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-20 06:05:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-11-20 06:05:49,264 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-11-20 06:05:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-20 06:05:49,264 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-20 06:05:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-20 06:05:49,264 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-20 06:05:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-20 06:05:49,265 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-20 06:05:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-20 06:05:49,265 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-20 06:05:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-20 06:05:49,266 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-20 06:05:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:05:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-20 06:05:49,266 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-20 06:05:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:05:49,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:05:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-20 06:05:49,267 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-20 06:05:49,470 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:05:49,472 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:05:50,501 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:05:50,531 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:05:50,532 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-20 06:05:50,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:05:50 BoogieIcfgContainer [2021-11-20 06:05:50,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:05:50,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:05:50,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:05:50,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:05:50,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:05:48" (1/3) ... [2021-11-20 06:05:50,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f04419c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:05:50, skipping insertion in model container [2021-11-20 06:05:50,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:05:48" (2/3) ... [2021-11-20 06:05:50,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f04419c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:05:50, skipping insertion in model container [2021-11-20 06:05:50,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:05:50" (3/3) ... [2021-11-20 06:05:50,561 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2021-11-20 06:05:50,580 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:05:50,581 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 06:05:50,710 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:05:50,718 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 [2021-11-20 06:05:50,719 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:05:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 362 states have (on average 1.6408839779005524) internal successors, (594), 367 states have internal predecessors, (594), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 06:05:50,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 06:05:50,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:50,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:50,765 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:50,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:50,771 INFO L85 PathProgramCache]: Analyzing trace with hash -664078165, now seen corresponding path program 1 times [2021-11-20 06:05:50,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:50,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92734297] [2021-11-20 06:05:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:50,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:50,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:05:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:51,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:05:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:05:51,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:51,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92734297] [2021-11-20 06:05:51,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92734297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:51,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:51,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:05:51,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286663083] [2021-11-20 06:05:51,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:51,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:05:51,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:51,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:05:51,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:05:51,102 INFO L87 Difference]: Start difference. First operand has 404 states, 362 states have (on average 1.6408839779005524) internal successors, (594), 367 states have internal predecessors, (594), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:05:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:51,768 INFO L93 Difference]: Finished difference Result 794 states and 1281 transitions. [2021-11-20 06:05:51,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:05:51,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-11-20 06:05:51,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:51,804 INFO L225 Difference]: With dead ends: 794 [2021-11-20 06:05:51,805 INFO L226 Difference]: Without dead ends: 403 [2021-11-20 06:05:51,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:05:51,823 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 347 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:51,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1207 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:05:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-20 06:05:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 394. [2021-11-20 06:05:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 354 states have (on average 1.5451977401129944) internal successors, (547), 357 states have internal predecessors, (547), 30 states have call successors, (30), 9 states have call predecessors, (30), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-20 06:05:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 605 transitions. [2021-11-20 06:05:51,931 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 605 transitions. Word has length 44 [2021-11-20 06:05:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:51,932 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 605 transitions. [2021-11-20 06:05:51,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:05:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 605 transitions. [2021-11-20 06:05:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 06:05:51,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:51,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:51,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:05:51,937 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:51,938 INFO L85 PathProgramCache]: Analyzing trace with hash 707729133, now seen corresponding path program 1 times [2021-11-20 06:05:51,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:51,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385006759] [2021-11-20 06:05:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:51,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:05:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:05:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:05:52,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:52,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385006759] [2021-11-20 06:05:52,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385006759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:52,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:52,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:05:52,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752898727] [2021-11-20 06:05:52,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:52,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:05:52,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:52,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:05:52,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:05:52,091 INFO L87 Difference]: Start difference. First operand 394 states and 605 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:05:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:52,324 INFO L93 Difference]: Finished difference Result 524 states and 788 transitions. [2021-11-20 06:05:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:05:52,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-11-20 06:05:52,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:52,334 INFO L225 Difference]: With dead ends: 524 [2021-11-20 06:05:52,334 INFO L226 Difference]: Without dead ends: 462 [2021-11-20 06:05:52,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:05:52,340 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 816 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:52,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 978 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:05:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-20 06:05:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 456. [2021-11-20 06:05:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 409 states have (on average 1.5183374083129584) internal successors, (621), 413 states have internal predecessors, (621), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2021-11-20 06:05:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 693 transitions. [2021-11-20 06:05:52,387 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 693 transitions. Word has length 44 [2021-11-20 06:05:52,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:52,388 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 693 transitions. [2021-11-20 06:05:52,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:05:52,388 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 693 transitions. [2021-11-20 06:05:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:05:52,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:52,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:52,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:05:52,398 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:52,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1229769440, now seen corresponding path program 1 times [2021-11-20 06:05:52,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:52,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867794026] [2021-11-20 06:05:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:52,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:05:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:05:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:05:52,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:52,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867794026] [2021-11-20 06:05:52,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867794026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:52,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:52,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:05:52,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659622919] [2021-11-20 06:05:52,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:52,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:05:52,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:05:52,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:05:52,517 INFO L87 Difference]: Start difference. First operand 456 states and 693 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:05:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:52,697 INFO L93 Difference]: Finished difference Result 716 states and 1063 transitions. [2021-11-20 06:05:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:05:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-20 06:05:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:52,703 INFO L225 Difference]: With dead ends: 716 [2021-11-20 06:05:52,703 INFO L226 Difference]: Without dead ends: 592 [2021-11-20 06:05:52,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:05:52,705 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 833 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:52,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 987 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:05:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-20 06:05:52,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 567. [2021-11-20 06:05:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 507 states have (on average 1.4792899408284024) internal successors, (750), 512 states have internal predecessors, (750), 42 states have call successors, (42), 15 states have call predecessors, (42), 16 states have return successors, (52), 40 states have call predecessors, (52), 40 states have call successors, (52) [2021-11-20 06:05:52,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 844 transitions. [2021-11-20 06:05:52,740 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 844 transitions. Word has length 45 [2021-11-20 06:05:52,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:52,741 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 844 transitions. [2021-11-20 06:05:52,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:05:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 844 transitions. [2021-11-20 06:05:52,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:05:52,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:52,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:52,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:05:52,744 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:52,745 INFO L85 PathProgramCache]: Analyzing trace with hash 54588021, now seen corresponding path program 1 times [2021-11-20 06:05:52,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:52,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733515592] [2021-11-20 06:05:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:52,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:05:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:05:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:05:52,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:52,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733515592] [2021-11-20 06:05:52,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733515592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:52,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:52,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:05:52,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572583721] [2021-11-20 06:05:52,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:52,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:05:52,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:52,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:05:52,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:05:52,802 INFO L87 Difference]: Start difference. First operand 567 states and 844 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:05:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:53,374 INFO L93 Difference]: Finished difference Result 1016 states and 1444 transitions. [2021-11-20 06:05:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:05:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-20 06:05:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:53,386 INFO L225 Difference]: With dead ends: 1016 [2021-11-20 06:05:53,386 INFO L226 Difference]: Without dead ends: 781 [2021-11-20 06:05:53,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:05:53,399 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 324 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:53,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1314 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:05:53,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-11-20 06:05:53,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 665. [2021-11-20 06:05:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 596 states have (on average 1.4563758389261745) internal successors, (868), 603 states have internal predecessors, (868), 46 states have call successors, (46), 20 states have call predecessors, (46), 21 states have return successors, (54), 42 states have call predecessors, (54), 44 states have call successors, (54) [2021-11-20 06:05:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 968 transitions. [2021-11-20 06:05:53,519 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 968 transitions. Word has length 45 [2021-11-20 06:05:53,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:53,519 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 968 transitions. [2021-11-20 06:05:53,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:05:53,520 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 968 transitions. [2021-11-20 06:05:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:05:53,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:53,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:53,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:05:53,525 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:53,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1156464466, now seen corresponding path program 1 times [2021-11-20 06:05:53,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:53,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112277056] [2021-11-20 06:05:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:53,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:05:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:05:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:05:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:05:53,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:53,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112277056] [2021-11-20 06:05:53,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112277056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:53,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:53,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:05:53,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321043898] [2021-11-20 06:05:53,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:53,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:05:53,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:05:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:05:53,655 INFO L87 Difference]: Start difference. First operand 665 states and 968 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:05:54,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:54,262 INFO L93 Difference]: Finished difference Result 1204 states and 1687 transitions. [2021-11-20 06:05:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:05:54,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-11-20 06:05:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:54,270 INFO L225 Difference]: With dead ends: 1204 [2021-11-20 06:05:54,270 INFO L226 Difference]: Without dead ends: 871 [2021-11-20 06:05:54,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:05:54,273 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 312 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:54,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1341 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:05:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-20 06:05:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 833. [2021-11-20 06:05:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 743 states have (on average 1.4064602960969044) internal successors, (1045), 752 states have internal predecessors, (1045), 58 states have call successors, (58), 27 states have call predecessors, (58), 30 states have return successors, (74), 54 states have call predecessors, (74), 56 states have call successors, (74) [2021-11-20 06:05:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1177 transitions. [2021-11-20 06:05:54,346 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1177 transitions. Word has length 62 [2021-11-20 06:05:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:54,347 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1177 transitions. [2021-11-20 06:05:54,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:05:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1177 transitions. [2021-11-20 06:05:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 06:05:54,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:54,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:54,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:05:54,351 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:54,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:54,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1541851731, now seen corresponding path program 1 times [2021-11-20 06:05:54,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:54,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449800811] [2021-11-20 06:05:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:54,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:54,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:05:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:54,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:05:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:54,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:05:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:05:54,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:54,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449800811] [2021-11-20 06:05:54,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449800811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:54,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:54,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:05:54,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859122924] [2021-11-20 06:05:54,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:54,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:05:54,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:54,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:05:54,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:05:54,428 INFO L87 Difference]: Start difference. First operand 833 states and 1177 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:05:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:54,668 INFO L93 Difference]: Finished difference Result 1462 states and 1999 transitions. [2021-11-20 06:05:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:05:54,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-11-20 06:05:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:54,677 INFO L225 Difference]: With dead ends: 1462 [2021-11-20 06:05:54,677 INFO L226 Difference]: Without dead ends: 1008 [2021-11-20 06:05:54,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:05:54,680 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 812 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:54,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 1000 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:05:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-11-20 06:05:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 953. [2021-11-20 06:05:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 850 states have (on average 1.3776470588235294) internal successors, (1171), 861 states have internal predecessors, (1171), 64 states have call successors, (64), 32 states have call predecessors, (64), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-11-20 06:05:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1319 transitions. [2021-11-20 06:05:54,759 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1319 transitions. Word has length 67 [2021-11-20 06:05:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:54,759 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1319 transitions. [2021-11-20 06:05:54,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:05:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1319 transitions. [2021-11-20 06:05:54,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:05:54,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:54,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:54,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:05:54,764 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:54,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:54,764 INFO L85 PathProgramCache]: Analyzing trace with hash -14326018, now seen corresponding path program 1 times [2021-11-20 06:05:54,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:54,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575476829] [2021-11-20 06:05:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:54,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:54,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:05:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:54,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:54,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 06:05:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:05:54,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:54,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575476829] [2021-11-20 06:05:54,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575476829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:54,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905676371] [2021-11-20 06:05:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:54,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:54,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:54,932 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:54,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:05:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:55,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:05:55,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:05:55,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:05:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:05:55,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905676371] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:55,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:05:55,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-11-20 06:05:55,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110206630] [2021-11-20 06:05:55,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:55,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:05:55,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:55,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:05:55,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:55,652 INFO L87 Difference]: Start difference. First operand 953 states and 1319 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:05:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:55,828 INFO L93 Difference]: Finished difference Result 1009 states and 1387 transitions. [2021-11-20 06:05:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:05:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-11-20 06:05:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:55,838 INFO L225 Difference]: With dead ends: 1009 [2021-11-20 06:05:55,838 INFO L226 Difference]: Without dead ends: 1006 [2021-11-20 06:05:55,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:05:55,841 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 1096 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:55,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 700 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:05:55,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-11-20 06:05:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 952. [2021-11-20 06:05:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 850 states have (on average 1.3752941176470588) internal successors, (1169), 860 states have internal predecessors, (1169), 63 states have call successors, (63), 32 states have call predecessors, (63), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-11-20 06:05:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1316 transitions. [2021-11-20 06:05:55,919 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1316 transitions. Word has length 68 [2021-11-20 06:05:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:55,921 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1316 transitions. [2021-11-20 06:05:55,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:05:55,921 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1316 transitions. [2021-11-20 06:05:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 06:05:55,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:55,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:55,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:56,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:05:56,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash -445352970, now seen corresponding path program 1 times [2021-11-20 06:05:56,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480296532] [2021-11-20 06:05:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:56,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:56,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:05:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:56,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:56,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 06:05:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:05:56,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:56,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480296532] [2021-11-20 06:05:56,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480296532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:56,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657026801] [2021-11-20 06:05:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:56,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:56,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:56,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:56,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:05:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:56,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:05:56,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:05:57,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:05:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:05:57,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657026801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:05:57,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:05:57,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-11-20 06:05:57,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85314849] [2021-11-20 06:05:57,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:05:57,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:05:57,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:57,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:05:57,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:05:57,264 INFO L87 Difference]: Start difference. First operand 952 states and 1316 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-20 06:05:59,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:59,501 INFO L93 Difference]: Finished difference Result 2652 states and 3536 transitions. [2021-11-20 06:05:59,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 06:05:59,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-11-20 06:05:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:59,518 INFO L225 Difference]: With dead ends: 2652 [2021-11-20 06:05:59,518 INFO L226 Difference]: Without dead ends: 2108 [2021-11-20 06:05:59,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 06:05:59,523 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 1620 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 3954 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:59,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1651 Valid, 3954 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:05:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-11-20 06:05:59,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1341. [2021-11-20 06:05:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1200 states have (on average 1.3358333333333334) internal successors, (1603), 1218 states have internal predecessors, (1603), 83 states have call successors, (83), 46 states have call predecessors, (83), 56 states have return successors, (118), 77 states have call predecessors, (118), 82 states have call successors, (118) [2021-11-20 06:05:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1804 transitions. [2021-11-20 06:05:59,696 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1804 transitions. Word has length 69 [2021-11-20 06:05:59,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:59,696 INFO L470 AbstractCegarLoop]: Abstraction has 1341 states and 1804 transitions. [2021-11-20 06:05:59,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-20 06:05:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1804 transitions. [2021-11-20 06:05:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 06:05:59,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:59,709 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:59,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:59,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:59,928 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2000679978, now seen corresponding path program 1 times [2021-11-20 06:05:59,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:59,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590976672] [2021-11-20 06:05:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:59,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:59,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:05:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:59,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:00,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 06:06:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:00,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:06:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 06:06:00,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:00,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590976672] [2021-11-20 06:06:00,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590976672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:06:00,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861383255] [2021-11-20 06:06:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:00,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:00,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:06:00,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:06:00,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:06:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:00,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:06:00,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:06:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:06:00,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:06:00,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861383255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:00,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:06:00,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-20 06:06:00,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389552037] [2021-11-20 06:06:00,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:00,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:06:00,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:00,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:06:00,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:00,376 INFO L87 Difference]: Start difference. First operand 1341 states and 1804 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:06:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:00,480 INFO L93 Difference]: Finished difference Result 2064 states and 2742 transitions. [2021-11-20 06:06:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:06:00,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-11-20 06:06:00,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:00,492 INFO L225 Difference]: With dead ends: 2064 [2021-11-20 06:06:00,492 INFO L226 Difference]: Without dead ends: 1219 [2021-11-20 06:06:00,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:00,499 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 566 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:00,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 705 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:06:00,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-11-20 06:06:00,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1204. [2021-11-20 06:06:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1079 states have (on average 1.33920296570899) internal successors, (1445), 1096 states have internal predecessors, (1445), 75 states have call successors, (75), 40 states have call predecessors, (75), 48 states have return successors, (104), 68 states have call predecessors, (104), 74 states have call successors, (104) [2021-11-20 06:06:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1624 transitions. [2021-11-20 06:06:00,621 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1624 transitions. Word has length 88 [2021-11-20 06:06:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:00,622 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 1624 transitions. [2021-11-20 06:06:00,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:06:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1624 transitions. [2021-11-20 06:06:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 06:06:00,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:00,628 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:00,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:06:00,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:00,843 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash 148780141, now seen corresponding path program 1 times [2021-11-20 06:06:00,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:00,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036160122] [2021-11-20 06:06:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:00,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:00,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:06:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:00,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:06:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:00,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:00,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-20 06:06:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:00,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 06:06:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:06:00,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:00,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036160122] [2021-11-20 06:06:00,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036160122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:06:00,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206174521] [2021-11-20 06:06:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:00,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:00,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:06:00,977 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:06:01,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:06:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:06:01,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:06:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:06:01,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:06:01,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206174521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:01,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:06:01,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-20 06:06:01,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359418432] [2021-11-20 06:06:01,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:01,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:06:01,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:06:01,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:01,412 INFO L87 Difference]: Start difference. First operand 1204 states and 1624 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 06:06:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:01,492 INFO L93 Difference]: Finished difference Result 1473 states and 1965 transitions. [2021-11-20 06:06:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:06:01,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-11-20 06:06:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:01,497 INFO L225 Difference]: With dead ends: 1473 [2021-11-20 06:06:01,497 INFO L226 Difference]: Without dead ends: 328 [2021-11-20 06:06:01,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:01,501 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 59 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:01,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1228 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:06:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-20 06:06:01,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2021-11-20 06:06:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.569023569023569) internal successors, (466), 298 states have internal predecessors, (466), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 06:06:01,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 514 transitions. [2021-11-20 06:06:01,525 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 514 transitions. Word has length 103 [2021-11-20 06:06:01,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:01,525 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 514 transitions. [2021-11-20 06:06:01,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 06:06:01,526 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 514 transitions. [2021-11-20 06:06:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:06:01,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:01,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:01,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:06:01,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad539ee1-9f49-4856-b906-622df5a755d3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:01,755 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:01,755 INFO L85 PathProgramCache]: Analyzing trace with hash -918151462, now seen corresponding path program 1 times [2021-11-20 06:06:01,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:01,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615744463] [2021-11-20 06:06:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:01,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:06:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:06:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:01,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:01,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615744463] [2021-11-20 06:06:01,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615744463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:01,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:01,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:06:01,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683151959] [2021-11-20 06:06:01,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:01,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:06:01,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:01,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:06:01,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:06:01,918 INFO L87 Difference]: Start difference. First operand 328 states and 514 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:06:03,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:03,583 INFO L93 Difference]: Finished difference Result 768 states and 1224 transitions. [2021-11-20 06:06:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:06:03,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-20 06:06:03,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:03,588 INFO L225 Difference]: With dead ends: 768 [2021-11-20 06:06:03,589 INFO L226 Difference]: Without dead ends: 448 [2021-11-20 06:06:03,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:03,592 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 879 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:03,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 923 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:06:03,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-20 06:06:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 328. [2021-11-20 06:06:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5656565656565657) internal successors, (465), 298 states have internal predecessors, (465), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 06:06:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 513 transitions. [2021-11-20 06:06:03,631 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 513 transitions. Word has length 156 [2021-11-20 06:06:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:03,632 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 513 transitions. [2021-11-20 06:06:03,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:06:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 513 transitions. [2021-11-20 06:06:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:06:03,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:03,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:03,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:06:03,637 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:03,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1445690200, now seen corresponding path program 1 times [2021-11-20 06:06:03,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:03,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898369504] [2021-11-20 06:06:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:03,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:03,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:06:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:03,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:03,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:03,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:03,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:06:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:03,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:03,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898369504] [2021-11-20 06:06:03,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898369504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:03,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:03,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:06:03,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037910326] [2021-11-20 06:06:03,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:03,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:06:03,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:03,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:06:03,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:06:03,826 INFO L87 Difference]: Start difference. First operand 328 states and 513 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:06:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:05,391 INFO L93 Difference]: Finished difference Result 760 states and 1207 transitions. [2021-11-20 06:06:05,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:06:05,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2021-11-20 06:06:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:05,396 INFO L225 Difference]: With dead ends: 760 [2021-11-20 06:06:05,396 INFO L226 Difference]: Without dead ends: 448 [2021-11-20 06:06:05,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:06:05,399 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 870 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:05,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 921 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:06:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-20 06:06:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 328. [2021-11-20 06:06:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.5622895622895623) internal successors, (464), 298 states have internal predecessors, (464), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 06:06:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 512 transitions. [2021-11-20 06:06:05,436 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 512 transitions. Word has length 156 [2021-11-20 06:06:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:05,436 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 512 transitions. [2021-11-20 06:06:05,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:06:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 512 transitions. [2021-11-20 06:06:05,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:06:05,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:05,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:05,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:06:05,440 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:05,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:05,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1061407274, now seen corresponding path program 1 times [2021-11-20 06:06:05,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:05,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711906231] [2021-11-20 06:06:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:05,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:05,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:06:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:05,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:05,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:05,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:05,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:06:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:05,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:05,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711906231] [2021-11-20 06:06:05,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711906231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:05,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:05,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:06:05,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121966283] [2021-11-20 06:06:05,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:05,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:06:05,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:05,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:06:05,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:06:05,615 INFO L87 Difference]: Start difference. First operand 328 states and 512 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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) [2021-11-20 06:06:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:08,261 INFO L93 Difference]: Finished difference Result 1200 states and 1919 transitions. [2021-11-20 06:06:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:06:08,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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 156 [2021-11-20 06:06:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:08,268 INFO L225 Difference]: With dead ends: 1200 [2021-11-20 06:06:08,268 INFO L226 Difference]: Without dead ends: 891 [2021-11-20 06:06:08,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:06:08,271 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 1325 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:08,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1342 Valid, 1481 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:06:08,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-11-20 06:06:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 652. [2021-11-20 06:06:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 595 states have (on average 1.576470588235294) internal successors, (938), 597 states have internal predecessors, (938), 43 states have call successors, (43), 12 states have call predecessors, (43), 13 states have return successors, (46), 43 states have call predecessors, (46), 43 states have call successors, (46) [2021-11-20 06:06:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1027 transitions. [2021-11-20 06:06:08,328 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1027 transitions. Word has length 156 [2021-11-20 06:06:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:08,328 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1027 transitions. [2021-11-20 06:06:08,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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) [2021-11-20 06:06:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1027 transitions. [2021-11-20 06:06:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:06:08,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:08,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:08,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:06:08,331 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash 761193050, now seen corresponding path program 1 times [2021-11-20 06:06:08,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:08,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300238473] [2021-11-20 06:06:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:08,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:08,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:06:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:08,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:08,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:08,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:08,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:06:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:08,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:08,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300238473] [2021-11-20 06:06:08,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300238473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:08,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:08,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:06:08,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147945573] [2021-11-20 06:06:08,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:08,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:06:08,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:08,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:06:08,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:08,487 INFO L87 Difference]: Start difference. First operand 652 states and 1027 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:11,827 INFO L93 Difference]: Finished difference Result 1983 states and 3175 transitions. [2021-11-20 06:06:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:06:11,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-11-20 06:06:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:11,840 INFO L225 Difference]: With dead ends: 1983 [2021-11-20 06:06:11,841 INFO L226 Difference]: Without dead ends: 1350 [2021-11-20 06:06:11,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:06:11,847 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 1438 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:11,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 1829 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 06:06:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-11-20 06:06:11,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 953. [2021-11-20 06:06:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 870 states have (on average 1.5701149425287357) internal successors, (1366), 873 states have internal predecessors, (1366), 62 states have call successors, (62), 18 states have call predecessors, (62), 20 states have return successors, (67), 63 states have call predecessors, (67), 62 states have call successors, (67) [2021-11-20 06:06:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1495 transitions. [2021-11-20 06:06:11,979 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1495 transitions. Word has length 156 [2021-11-20 06:06:11,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:11,979 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1495 transitions. [2021-11-20 06:06:11,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1495 transitions. [2021-11-20 06:06:11,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:06:11,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:11,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:11,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:06:11,983 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:11,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:11,984 INFO L85 PathProgramCache]: Analyzing trace with hash -856247400, now seen corresponding path program 1 times [2021-11-20 06:06:11,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:11,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724934309] [2021-11-20 06:06:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:11,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:12,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:06:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:12,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:12,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:12,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:12,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:06:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:12,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:12,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724934309] [2021-11-20 06:06:12,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724934309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:12,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:12,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:06:12,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039172533] [2021-11-20 06:06:12,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:12,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:06:12,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:06:12,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:12,167 INFO L87 Difference]: Start difference. First operand 953 states and 1495 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:15,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:15,565 INFO L93 Difference]: Finished difference Result 3136 states and 5011 transitions. [2021-11-20 06:06:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:06:15,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-11-20 06:06:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:15,580 INFO L225 Difference]: With dead ends: 3136 [2021-11-20 06:06:15,580 INFO L226 Difference]: Without dead ends: 2202 [2021-11-20 06:06:15,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:06:15,587 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 1350 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:15,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1367 Valid, 2523 Invalid, 2678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 06:06:15,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-11-20 06:06:15,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1559. [2021-11-20 06:06:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1424 states have (on average 1.565308988764045) internal successors, (2229), 1429 states have internal predecessors, (2229), 100 states have call successors, (100), 30 states have call predecessors, (100), 34 states have return successors, (113), 103 states have call predecessors, (113), 100 states have call successors, (113) [2021-11-20 06:06:15,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2442 transitions. [2021-11-20 06:06:15,742 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2442 transitions. Word has length 156 [2021-11-20 06:06:15,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:15,743 INFO L470 AbstractCegarLoop]: Abstraction has 1559 states and 2442 transitions. [2021-11-20 06:06:15,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2442 transitions. [2021-11-20 06:06:15,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:06:15,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:15,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:15,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:06:15,747 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:15,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash -567428010, now seen corresponding path program 1 times [2021-11-20 06:06:15,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:15,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931593112] [2021-11-20 06:06:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:15,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:15,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:06:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:15,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:15,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:15,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:15,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:06:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:15,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:15,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931593112] [2021-11-20 06:06:15,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931593112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:15,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:15,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:06:15,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371256146] [2021-11-20 06:06:15,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:15,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:06:15,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:15,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:06:15,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:15,904 INFO L87 Difference]: Start difference. First operand 1559 states and 2442 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:19,384 INFO L93 Difference]: Finished difference Result 5360 states and 8530 transitions. [2021-11-20 06:06:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:06:19,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-11-20 06:06:19,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:19,413 INFO L225 Difference]: With dead ends: 5360 [2021-11-20 06:06:19,413 INFO L226 Difference]: Without dead ends: 3820 [2021-11-20 06:06:19,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:06:19,421 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 1346 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:19,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1363 Valid, 2518 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2580 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 06:06:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2021-11-20 06:06:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 2772. [2021-11-20 06:06:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2533 states have (on average 1.5613896565337544) internal successors, (3955), 2542 states have internal predecessors, (3955), 176 states have call successors, (176), 54 states have call predecessors, (176), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2021-11-20 06:06:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 4342 transitions. [2021-11-20 06:06:19,766 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 4342 transitions. Word has length 156 [2021-11-20 06:06:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:19,767 INFO L470 AbstractCegarLoop]: Abstraction has 2772 states and 4342 transitions. [2021-11-20 06:06:19,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 4342 transitions. [2021-11-20 06:06:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:06:19,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:19,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:19,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:06:19,774 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:19,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:19,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1112300584, now seen corresponding path program 1 times [2021-11-20 06:06:19,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:19,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841131546] [2021-11-20 06:06:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:19,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:19,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:06:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:19,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:19,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:19,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:19,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:06:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:19,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:19,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841131546] [2021-11-20 06:06:19,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841131546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:19,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:19,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:06:19,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919890375] [2021-11-20 06:06:19,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:19,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:06:19,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:19,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:06:19,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:19,957 INFO L87 Difference]: Start difference. First operand 2772 states and 4342 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:23,884 INFO L93 Difference]: Finished difference Result 9807 states and 15584 transitions. [2021-11-20 06:06:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:06:23,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-11-20 06:06:23,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:23,981 INFO L225 Difference]: With dead ends: 9807 [2021-11-20 06:06:23,982 INFO L226 Difference]: Without dead ends: 7054 [2021-11-20 06:06:23,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:06:23,994 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 1345 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 2572 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 2658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:23,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1362 Valid, 2513 Invalid, 2658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2572 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 06:06:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7054 states. [2021-11-20 06:06:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7054 to 5205. [2021-11-20 06:06:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5205 states, 4758 states have (on average 1.558848255569567) internal successors, (7417), 4775 states have internal predecessors, (7417), 328 states have call successors, (328), 102 states have call predecessors, (328), 118 states have return successors, (425), 343 states have call predecessors, (425), 328 states have call successors, (425) [2021-11-20 06:06:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5205 states to 5205 states and 8170 transitions. [2021-11-20 06:06:24,652 INFO L78 Accepts]: Start accepts. Automaton has 5205 states and 8170 transitions. Word has length 156 [2021-11-20 06:06:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:24,652 INFO L470 AbstractCegarLoop]: Abstraction has 5205 states and 8170 transitions. [2021-11-20 06:06:24,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 5205 states and 8170 transitions. [2021-11-20 06:06:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:06:24,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:24,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:24,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:06:24,661 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:24,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:24,662 INFO L85 PathProgramCache]: Analyzing trace with hash -437140458, now seen corresponding path program 1 times [2021-11-20 06:06:24,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:24,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329923780] [2021-11-20 06:06:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:24,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:24,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:06:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:24,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:24,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:24,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:24,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:06:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:24,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:24,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329923780] [2021-11-20 06:06:24,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329923780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:24,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:24,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:06:24,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295905004] [2021-11-20 06:06:24,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:24,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:06:24,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:24,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:06:24,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:24,854 INFO L87 Difference]: Start difference. First operand 5205 states and 8170 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:27,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:27,083 INFO L93 Difference]: Finished difference Result 12324 states and 19645 transitions. [2021-11-20 06:06:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:06:27,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-11-20 06:06:27,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:27,153 INFO L225 Difference]: With dead ends: 12324 [2021-11-20 06:06:27,153 INFO L226 Difference]: Without dead ends: 7138 [2021-11-20 06:06:27,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:06:27,176 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 959 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:27,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 1342 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:06:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7138 states. [2021-11-20 06:06:27,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7138 to 5205. [2021-11-20 06:06:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5205 states, 4758 states have (on average 1.555275325767129) internal successors, (7400), 4775 states have internal predecessors, (7400), 328 states have call successors, (328), 102 states have call predecessors, (328), 118 states have return successors, (425), 343 states have call predecessors, (425), 328 states have call successors, (425) [2021-11-20 06:06:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5205 states to 5205 states and 8153 transitions. [2021-11-20 06:06:27,840 INFO L78 Accepts]: Start accepts. Automaton has 5205 states and 8153 transitions. Word has length 156 [2021-11-20 06:06:27,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:27,840 INFO L470 AbstractCegarLoop]: Abstraction has 5205 states and 8153 transitions. [2021-11-20 06:06:27,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5205 states and 8153 transitions. [2021-11-20 06:06:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:06:27,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:27,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:27,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:06:27,849 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1385192424, now seen corresponding path program 1 times [2021-11-20 06:06:27,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:27,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496915473] [2021-11-20 06:06:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:27,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:27,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:06:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:27,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:06:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:28,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:28,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496915473] [2021-11-20 06:06:28,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496915473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:28,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:28,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:06:28,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788452986] [2021-11-20 06:06:28,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:28,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:06:28,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:28,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:06:28,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:28,047 INFO L87 Difference]: Start difference. First operand 5205 states and 8153 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:32,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:32,076 INFO L93 Difference]: Finished difference Result 18684 states and 29634 transitions. [2021-11-20 06:06:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:06:32,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-11-20 06:06:32,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:32,137 INFO L225 Difference]: With dead ends: 18684 [2021-11-20 06:06:32,137 INFO L226 Difference]: Without dead ends: 13498 [2021-11-20 06:06:32,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:06:32,164 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 1337 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 2502 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:32,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 2502 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:06:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13498 states. [2021-11-20 06:06:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13498 to 10103. [2021-11-20 06:06:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10103 states, 9240 states have (on average 1.5528138528138529) internal successors, (14348), 9273 states have internal predecessors, (14348), 632 states have call successors, (632), 198 states have call predecessors, (632), 230 states have return successors, (907), 663 states have call predecessors, (907), 632 states have call successors, (907) [2021-11-20 06:06:33,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10103 states to 10103 states and 15887 transitions. [2021-11-20 06:06:33,380 INFO L78 Accepts]: Start accepts. Automaton has 10103 states and 15887 transitions. Word has length 156 [2021-11-20 06:06:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:33,381 INFO L470 AbstractCegarLoop]: Abstraction has 10103 states and 15887 transitions. [2021-11-20 06:06:33,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 10103 states and 15887 transitions. [2021-11-20 06:06:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:06:33,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:33,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:33,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 06:06:33,393 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:33,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:33,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1969964074, now seen corresponding path program 1 times [2021-11-20 06:06:33,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:33,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189596391] [2021-11-20 06:06:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:33,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:33,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:06:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:33,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:33,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:33,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:33,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:06:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:33,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:33,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189596391] [2021-11-20 06:06:33,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189596391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:33,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:33,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:06:33,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162418505] [2021-11-20 06:06:33,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:33,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:06:33,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:33,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:06:33,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:33,606 INFO L87 Difference]: Start difference. First operand 10103 states and 15887 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:38,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:38,942 INFO L93 Difference]: Finished difference Result 36476 states and 58074 transitions. [2021-11-20 06:06:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:06:38,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-11-20 06:06:38,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:39,063 INFO L225 Difference]: With dead ends: 36476 [2021-11-20 06:06:39,063 INFO L226 Difference]: Without dead ends: 26392 [2021-11-20 06:06:39,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:06:39,106 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 1336 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 2497 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:39,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1353 Valid, 2497 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2537 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 06:06:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26392 states. [2021-11-20 06:06:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26392 to 19928. [2021-11-20 06:06:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19928 states, 18233 states have (on average 1.5513629133987825) internal successors, (28286), 18298 states have internal predecessors, (28286), 1240 states have call successors, (1240), 390 states have call predecessors, (1240), 454 states have return successors, (2033), 1303 states have call predecessors, (2033), 1240 states have call successors, (2033) [2021-11-20 06:06:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19928 states to 19928 states and 31559 transitions. [2021-11-20 06:06:41,023 INFO L78 Accepts]: Start accepts. Automaton has 19928 states and 31559 transitions. Word has length 156 [2021-11-20 06:06:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:41,023 INFO L470 AbstractCegarLoop]: Abstraction has 19928 states and 31559 transitions. [2021-11-20 06:06:41,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19928 states and 31559 transitions. [2021-11-20 06:06:41,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:06:41,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:41,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:41,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:06:41,045 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:41,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:41,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1890497624, now seen corresponding path program 1 times [2021-11-20 06:06:41,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:41,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578937716] [2021-11-20 06:06:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:41,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:41,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:06:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:41,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:41,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:41,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:41,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:06:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:41,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:41,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578937716] [2021-11-20 06:06:41,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578937716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:41,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:41,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:06:41,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557386875] [2021-11-20 06:06:41,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:41,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:06:41,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:06:41,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:41,212 INFO L87 Difference]: Start difference. First operand 19928 states and 31559 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:45,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:45,885 INFO L93 Difference]: Finished difference Result 46676 states and 75138 transitions. [2021-11-20 06:06:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:06:45,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-11-20 06:06:45,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:46,014 INFO L225 Difference]: With dead ends: 46676 [2021-11-20 06:06:46,014 INFO L226 Difference]: Without dead ends: 26767 [2021-11-20 06:06:46,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:06:46,077 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 1155 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1173 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:46,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1173 Valid, 1135 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:06:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26767 states. [2021-11-20 06:06:47,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26767 to 19928. [2021-11-20 06:06:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19928 states, 18233 states have (on average 1.5477979487742006) internal successors, (28221), 18298 states have internal predecessors, (28221), 1240 states have call successors, (1240), 390 states have call predecessors, (1240), 454 states have return successors, (2033), 1303 states have call predecessors, (2033), 1240 states have call successors, (2033) [2021-11-20 06:06:47,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19928 states to 19928 states and 31494 transitions. [2021-11-20 06:06:47,986 INFO L78 Accepts]: Start accepts. Automaton has 19928 states and 31494 transitions. Word has length 156 [2021-11-20 06:06:47,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:47,987 INFO L470 AbstractCegarLoop]: Abstraction has 19928 states and 31494 transitions. [2021-11-20 06:06:47,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 19928 states and 31494 transitions. [2021-11-20 06:06:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:06:48,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:48,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:06:48,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:06:48,009 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:48,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1460839318, now seen corresponding path program 1 times [2021-11-20 06:06:48,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:48,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191873418] [2021-11-20 06:06:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:48,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:48,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:06:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:48,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:06:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:48,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:06:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:48,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:06:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:48,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:06:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:06:48,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:48,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191873418] [2021-11-20 06:06:48,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191873418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:48,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:48,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:06:48,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122134377] [2021-11-20 06:06:48,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:48,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:06:48,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:48,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:06:48,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:06:48,193 INFO L87 Difference]: Start difference. First operand 19928 states and 31494 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:06:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:06:59,209 INFO L93 Difference]: Finished difference Result 81463 states and 129558 transitions. [2021-11-20 06:06:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:06:59,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-11-20 06:06:59,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:06:59,558 INFO L225 Difference]: With dead ends: 81463 [2021-11-20 06:06:59,559 INFO L226 Difference]: Without dead ends: 61554 [2021-11-20 06:06:59,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:06:59,666 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 1430 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 2976 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 2638 SdHoareTripleChecker+Invalid, 3067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:06:59,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1446 Valid, 2638 Invalid, 3067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2976 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 06:06:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61554 states. [2021-11-20 06:07:04,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61554 to 39579. [2021-11-20 06:07:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39579 states, 36284 states have (on average 1.5487542718553633) internal successors, (56195), 36413 states have internal predecessors, (56195), 2392 states have call successors, (2392), 774 states have call predecessors, (2392), 902 states have return successors, (4707), 2519 states have call predecessors, (4707), 2392 states have call successors, (4707) [2021-11-20 06:07:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39579 states to 39579 states and 63294 transitions. [2021-11-20 06:07:04,451 INFO L78 Accepts]: Start accepts. Automaton has 39579 states and 63294 transitions. Word has length 156 [2021-11-20 06:07:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:04,451 INFO L470 AbstractCegarLoop]: Abstraction has 39579 states and 63294 transitions. [2021-11-20 06:07:04,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:07:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 39579 states and 63294 transitions. [2021-11-20 06:07:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:07:04,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:04,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:04,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 06:07:04,496 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:04,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1887090092, now seen corresponding path program 1 times [2021-11-20 06:07:04,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:04,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953398434] [2021-11-20 06:07:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:04,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:04,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:07:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:04,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:07:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:04,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:07:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:04,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:07:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:04,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:07:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:04,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:04,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953398434] [2021-11-20 06:07:04,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953398434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:04,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:04,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:07:04,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022405565] [2021-11-20 06:07:04,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:04,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:07:04,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:04,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:07:04,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:07:04,690 INFO L87 Difference]: Start difference. First operand 39579 states and 63294 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2021-11-20 06:07:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:21,597 INFO L93 Difference]: Finished difference Result 160056 states and 257376 transitions. [2021-11-20 06:07:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:07:21,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-11-20 06:07:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:22,160 INFO L225 Difference]: With dead ends: 160056 [2021-11-20 06:07:22,160 INFO L226 Difference]: Without dead ends: 120496 [2021-11-20 06:07:22,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:07:22,628 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 1694 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1722 SdHoareTripleChecker+Valid, 2461 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:22,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1722 Valid, 2461 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 06:07:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120496 states.