./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.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_9d7c141f-7b67-406a-b9a9-738bc2be842c/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/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_9d7c141f-7b67-406a-b9a9-738bc2be842c/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/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_9d7c141f-7b67-406a-b9a9-738bc2be842c/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 bb7f3b8fa32d5493bfca7086e69548af9d6372d67a054dd07846784fcdf24eca --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:36:08,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:36:08,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:36:08,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:36:08,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:36:08,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:36:08,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:36:08,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:36:08,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:36:08,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:36:08,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:36:08,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:36:08,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:36:08,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:36:08,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:36:08,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:36:08,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:36:08,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:36:08,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:36:08,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:36:08,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:36:08,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:36:08,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:36:08,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:36:08,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:36:08,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:36:08,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:36:08,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:36:08,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:36:08,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:36:08,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:36:08,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:36:08,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:36:08,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:36:08,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:36:08,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:36:08,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:36:08,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:36:08,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:36:08,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:36:08,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:36:08,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:36:08,776 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:36:08,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:36:08,776 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:36:08,777 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:36:08,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:36:08,778 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:36:08,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:36:08,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:36:08,780 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:36:08,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:36:08,780 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:36:08,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:36:08,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:36:08,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:36:08,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:36:08,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:36:08,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:36:08,782 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:36:08,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:36:08,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:36:08,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:36:08,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:36:08,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:36:08,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:36:08,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:36:08,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:36:08,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:36:08,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:36:08,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:36:08,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:36:08,786 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:36:08,786 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:36:08,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:36:08,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:36:08,787 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_9d7c141f-7b67-406a-b9a9-738bc2be842c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb7f3b8fa32d5493bfca7086e69548af9d6372d67a054dd07846784fcdf24eca [2021-11-20 06:36:09,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:36:09,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:36:09,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:36:09,223 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:36:09,224 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:36:09,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-20 06:36:09,333 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/bin/uautomizer-DQz5hQGWxF/data/c7ead8cc0/85496342708640c3a31974136231091f/FLAGe4608ddcb [2021-11-20 06:36:10,142 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:36:10,144 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-20 06:36:10,168 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/bin/uautomizer-DQz5hQGWxF/data/c7ead8cc0/85496342708640c3a31974136231091f/FLAGe4608ddcb [2021-11-20 06:36:10,379 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/bin/uautomizer-DQz5hQGWxF/data/c7ead8cc0/85496342708640c3a31974136231091f [2021-11-20 06:36:10,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:36:10,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:36:10,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:36:10,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:36:10,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:36:10,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:36:10" (1/1) ... [2021-11-20 06:36:10,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416af3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:10, skipping insertion in model container [2021-11-20 06:36:10,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:36:10" (1/1) ... [2021-11-20 06:36:10,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:36:10,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:36:10,867 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_9d7c141f-7b67-406a-b9a9-738bc2be842c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[9241,9254] [2021-11-20 06:36:10,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:36:10,961 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:36:11,039 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_9d7c141f-7b67-406a-b9a9-738bc2be842c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[9241,9254] [2021-11-20 06:36:11,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:36:11,116 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:36:11,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:11 WrapperNode [2021-11-20 06:36:11,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:36:11,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:36:11,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:36:11,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:36:11,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:11" (1/1) ... [2021-11-20 06:36:11,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:11" (1/1) ... [2021-11-20 06:36:11,266 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 742 [2021-11-20 06:36:11,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:36:11,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:36:11,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:36:11,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:36:11,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:11" (1/1) ... [2021-11-20 06:36:11,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:11" (1/1) ... [2021-11-20 06:36:11,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:11" (1/1) ... [2021-11-20 06:36:11,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:11" (1/1) ... [2021-11-20 06:36:11,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:11" (1/1) ... [2021-11-20 06:36:11,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:11" (1/1) ... [2021-11-20 06:36:11,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:11" (1/1) ... [2021-11-20 06:36:11,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:36:11,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:36:11,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:36:11,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:36:11,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:11" (1/1) ... [2021-11-20 06:36:11,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:36:11,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:11,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:36:11,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7c141f-7b67-406a-b9a9-738bc2be842c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:36:11,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:36:11,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:36:11,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:36:11,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:36:11,599 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:36:11,601 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:36:12,782 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:36:12,798 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:36:12,799 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 06:36:12,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:36:12 BoogieIcfgContainer [2021-11-20 06:36:12,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:36:12,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:36:12,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:36:12,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:36:12,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:36:10" (1/3) ... [2021-11-20 06:36:12,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428d35c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:36:12, skipping insertion in model container [2021-11-20 06:36:12,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:11" (2/3) ... [2021-11-20 06:36:12,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428d35c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:36:12, skipping insertion in model container [2021-11-20 06:36:12,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:36:12" (3/3) ... [2021-11-20 06:36:12,821 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-20 06:36:12,828 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:36:12,828 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:36:12,914 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:36:12,928 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 06:36:12,928 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:36:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 178 states, 176 states have (on average 1.7613636363636365) internal successors, (310), 177 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:12,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 06:36:12,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:12,989 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] [2021-11-20 06:36:12,990 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:13,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2136906399, now seen corresponding path program 1 times [2021-11-20 06:36:13,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:13,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750485697] [2021-11-20 06:36:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:13,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:13,799 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 06:36:13,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:13,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750485697] [2021-11-20 06:36:13,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750485697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:13,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:13,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:36:13,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661790967] [2021-11-20 06:36:13,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:13,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:36:13,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:13,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:36:13,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:36:13,867 INFO L87 Difference]: Start difference. First operand has 178 states, 176 states have (on average 1.7613636363636365) internal successors, (310), 177 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:14,801 INFO L93 Difference]: Finished difference Result 1147 states and 1843 transitions. [2021-11-20 06:36:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:36:14,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-20 06:36:14,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:14,833 INFO L225 Difference]: With dead ends: 1147 [2021-11-20 06:36:14,833 INFO L226 Difference]: Without dead ends: 1037 [2021-11-20 06:36:14,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:36:14,845 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 2029 mSDsluCounter, 3070 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2029 SdHoareTripleChecker+Valid, 3789 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:14,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2029 Valid, 3789 Invalid, 315 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [12 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:36:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-11-20 06:36:14,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 270. [2021-11-20 06:36:14,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.449814126394052) internal successors, (390), 269 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 390 transitions. [2021-11-20 06:36:15,003 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 390 transitions. Word has length 91 [2021-11-20 06:36:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:15,005 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 390 transitions. [2021-11-20 06:36:15,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 390 transitions. [2021-11-20 06:36:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:36:15,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:15,024 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] [2021-11-20 06:36:15,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:36:15,025 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:15,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1446649810, now seen corresponding path program 1 times [2021-11-20 06:36:15,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:15,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416428424] [2021-11-20 06:36:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:15,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:15,274 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 06:36:15,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:15,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416428424] [2021-11-20 06:36:15,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416428424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:15,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:15,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:36:15,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397522376] [2021-11-20 06:36:15,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:15,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:36:15,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:15,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:36:15,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:36:15,280 INFO L87 Difference]: Start difference. First operand 270 states and 390 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:15,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:15,725 INFO L93 Difference]: Finished difference Result 1236 states and 1911 transitions. [2021-11-20 06:36:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:36:15,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 06:36:15,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:15,739 INFO L225 Difference]: With dead ends: 1236 [2021-11-20 06:36:15,739 INFO L226 Difference]: Without dead ends: 1096 [2021-11-20 06:36:15,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:36:15,751 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 1352 mSDsluCounter, 1719 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 2393 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:15,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1352 Valid, 2393 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:36:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-11-20 06:36:15,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 429. [2021-11-20 06:36:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.5) internal successors, (642), 428 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 642 transitions. [2021-11-20 06:36:15,835 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 642 transitions. Word has length 93 [2021-11-20 06:36:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:15,837 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 642 transitions. [2021-11-20 06:36:15,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 642 transitions. [2021-11-20 06:36:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:36:15,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:15,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:15,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:36:15,849 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash 529896762, now seen corresponding path program 1 times [2021-11-20 06:36:15,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:15,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569384383] [2021-11-20 06:36:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:15,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:16,099 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 06:36:16,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:16,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569384383] [2021-11-20 06:36:16,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569384383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:16,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:16,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:36:16,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539267238] [2021-11-20 06:36:16,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:16,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:36:16,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:16,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:36:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:36:16,105 INFO L87 Difference]: Start difference. First operand 429 states and 642 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:16,576 INFO L93 Difference]: Finished difference Result 1390 states and 2155 transitions. [2021-11-20 06:36:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:36:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 06:36:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:16,590 INFO L225 Difference]: With dead ends: 1390 [2021-11-20 06:36:16,591 INFO L226 Difference]: Without dead ends: 1250 [2021-11-20 06:36:16,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:36:16,599 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 1558 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1558 SdHoareTripleChecker+Valid, 1993 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:16,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1558 Valid, 1993 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:36:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-20 06:36:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 652. [2021-11-20 06:36:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 1.5284178187403994) internal successors, (995), 651 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 995 transitions. [2021-11-20 06:36:16,687 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 995 transitions. Word has length 93 [2021-11-20 06:36:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:16,688 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 995 transitions. [2021-11-20 06:36:16,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 995 transitions. [2021-11-20 06:36:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:36:16,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:16,690 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] [2021-11-20 06:36:16,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:36:16,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:16,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1234930226, now seen corresponding path program 1 times [2021-11-20 06:36:16,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:16,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375977008] [2021-11-20 06:36:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:16,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:16,854 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 06:36:16,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375977008] [2021-11-20 06:36:16,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375977008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:16,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:16,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:36:16,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779695332] [2021-11-20 06:36:16,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:16,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:36:16,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:36:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:36:16,859 INFO L87 Difference]: Start difference. First operand 652 states and 995 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:17,265 INFO L93 Difference]: Finished difference Result 1539 states and 2391 transitions. [2021-11-20 06:36:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:36:17,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 06:36:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:17,277 INFO L225 Difference]: With dead ends: 1539 [2021-11-20 06:36:17,278 INFO L226 Difference]: Without dead ends: 1399 [2021-11-20 06:36:17,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:36:17,281 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 1760 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1760 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:17,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1760 Valid, 1822 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:36:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-11-20 06:36:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 796. [2021-11-20 06:36:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 1.538364779874214) internal successors, (1223), 795 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1223 transitions. [2021-11-20 06:36:17,390 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1223 transitions. Word has length 93 [2021-11-20 06:36:17,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:17,391 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1223 transitions. [2021-11-20 06:36:17,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1223 transitions. [2021-11-20 06:36:17,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:36:17,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:17,394 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] [2021-11-20 06:36:17,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:36:17,395 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:17,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1576423674, now seen corresponding path program 1 times [2021-11-20 06:36:17,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:17,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71652174] [2021-11-20 06:36:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:17,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:17,592 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 06:36:17,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:17,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71652174] [2021-11-20 06:36:17,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71652174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:17,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:17,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:36:17,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007646414] [2021-11-20 06:36:17,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:17,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:36:17,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:17,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:36:17,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:36:17,600 INFO L87 Difference]: Start difference. First operand 796 states and 1223 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:18,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:18,035 INFO L93 Difference]: Finished difference Result 1678 states and 2611 transitions. [2021-11-20 06:36:18,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:36:18,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 06:36:18,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:18,049 INFO L225 Difference]: With dead ends: 1678 [2021-11-20 06:36:18,049 INFO L226 Difference]: Without dead ends: 1538 [2021-11-20 06:36:18,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:36:18,053 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 1863 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1863 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:18,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1863 Valid, 1822 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:36:18,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-11-20 06:36:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 935. [2021-11-20 06:36:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 1.544967880085653) internal successors, (1443), 934 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1443 transitions. [2021-11-20 06:36:18,175 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1443 transitions. Word has length 93 [2021-11-20 06:36:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:18,177 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 1443 transitions. [2021-11-20 06:36:18,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1443 transitions. [2021-11-20 06:36:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:36:18,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:18,185 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] [2021-11-20 06:36:18,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:36:18,185 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1813331907, now seen corresponding path program 1 times [2021-11-20 06:36:18,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:18,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356498886] [2021-11-20 06:36:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:18,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:18,628 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 06:36:18,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:18,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356498886] [2021-11-20 06:36:18,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356498886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:18,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:18,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:36:18,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624175929] [2021-11-20 06:36:18,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:18,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:36:18,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:18,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:36:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:36:18,632 INFO L87 Difference]: Start difference. First operand 935 states and 1443 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:19,131 INFO L93 Difference]: Finished difference Result 1698 states and 2650 transitions. [2021-11-20 06:36:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:36:19,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 06:36:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:19,139 INFO L225 Difference]: With dead ends: 1698 [2021-11-20 06:36:19,139 INFO L226 Difference]: Without dead ends: 937 [2021-11-20 06:36:19,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:36:19,144 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 773 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:19,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 953 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:36:19,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-11-20 06:36:19,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 935. [2021-11-20 06:36:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 1.5385438972162742) internal successors, (1437), 934 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1437 transitions. [2021-11-20 06:36:19,275 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1437 transitions. Word has length 93 [2021-11-20 06:36:19,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:19,275 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 1437 transitions. [2021-11-20 06:36:19,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:19,276 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1437 transitions. [2021-11-20 06:36:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:36:19,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:19,278 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] [2021-11-20 06:36:19,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:36:19,279 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:19,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1570207556, now seen corresponding path program 1 times [2021-11-20 06:36:19,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:19,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468368960] [2021-11-20 06:36:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:19,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:19,348 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 06:36:19,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:19,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468368960] [2021-11-20 06:36:19,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468368960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:19,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:19,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:36:19,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478265973] [2021-11-20 06:36:19,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:19,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:36:19,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:19,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:36:19,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:36:19,352 INFO L87 Difference]: Start difference. First operand 935 states and 1437 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:19,583 INFO L93 Difference]: Finished difference Result 2386 states and 3718 transitions. [2021-11-20 06:36:19,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:36:19,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 06:36:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:19,596 INFO L225 Difference]: With dead ends: 2386 [2021-11-20 06:36:19,596 INFO L226 Difference]: Without dead ends: 1625 [2021-11-20 06:36:19,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:36:19,599 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 99 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:19,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 562 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:36:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2021-11-20 06:36:19,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1623. [2021-11-20 06:36:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 1.5382244143033292) internal successors, (2495), 1622 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 2495 transitions. [2021-11-20 06:36:19,802 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 2495 transitions. Word has length 93 [2021-11-20 06:36:19,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:19,802 INFO L470 AbstractCegarLoop]: Abstraction has 1623 states and 2495 transitions. [2021-11-20 06:36:19,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 2495 transitions. [2021-11-20 06:36:19,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:36:19,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:19,805 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] [2021-11-20 06:36:19,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:36:19,806 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:19,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:19,807 INFO L85 PathProgramCache]: Analyzing trace with hash -906608998, now seen corresponding path program 1 times [2021-11-20 06:36:19,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:19,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147407332] [2021-11-20 06:36:19,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:19,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:19,964 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 06:36:19,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:19,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147407332] [2021-11-20 06:36:19,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147407332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:19,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:19,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:36:19,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444174758] [2021-11-20 06:36:19,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:19,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:36:19,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:36:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:36:19,968 INFO L87 Difference]: Start difference. First operand 1623 states and 2495 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:20,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:20,543 INFO L93 Difference]: Finished difference Result 3260 states and 5043 transitions. [2021-11-20 06:36:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:36:20,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 06:36:20,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:20,565 INFO L225 Difference]: With dead ends: 3260 [2021-11-20 06:36:20,566 INFO L226 Difference]: Without dead ends: 2995 [2021-11-20 06:36:20,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:36:20,568 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 1631 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:20,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1631 Valid, 2500 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:36:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-11-20 06:36:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 1897. [2021-11-20 06:36:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 1.5411392405063291) internal successors, (2922), 1896 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2922 transitions. [2021-11-20 06:36:20,811 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2922 transitions. Word has length 93 [2021-11-20 06:36:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:20,812 INFO L470 AbstractCegarLoop]: Abstraction has 1897 states and 2922 transitions. [2021-11-20 06:36:20,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2922 transitions. [2021-11-20 06:36:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:36:20,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:20,815 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] [2021-11-20 06:36:20,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:36:20,815 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:20,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:20,816 INFO L85 PathProgramCache]: Analyzing trace with hash 861848230, now seen corresponding path program 1 times [2021-11-20 06:36:20,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:20,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169265596] [2021-11-20 06:36:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:20,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:20,984 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 06:36:20,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:20,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169265596] [2021-11-20 06:36:20,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169265596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:20,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:20,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:36:20,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385441930] [2021-11-20 06:36:20,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:20,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:36:20,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:20,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:36:20,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:36:20,989 INFO L87 Difference]: Start difference. First operand 1897 states and 2922 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:21,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:21,643 INFO L93 Difference]: Finished difference Result 3544 states and 5486 transitions. [2021-11-20 06:36:21,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:36:21,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 06:36:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:21,667 INFO L225 Difference]: With dead ends: 3544 [2021-11-20 06:36:21,668 INFO L226 Difference]: Without dead ends: 3279 [2021-11-20 06:36:21,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:36:21,671 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 1747 mSDsluCounter, 1885 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1747 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:21,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1747 Valid, 2267 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:36:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-11-20 06:36:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2181. [2021-11-20 06:36:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.5435779816513762) internal successors, (3365), 2180 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3365 transitions. [2021-11-20 06:36:21,966 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3365 transitions. Word has length 93 [2021-11-20 06:36:21,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:21,967 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3365 transitions. [2021-11-20 06:36:21,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:21,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3365 transitions. [2021-11-20 06:36:21,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 06:36:21,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:21,970 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] [2021-11-20 06:36:21,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:36:21,970 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:21,971 INFO L85 PathProgramCache]: Analyzing trace with hash 376805043, now seen corresponding path program 1 times [2021-11-20 06:36:21,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:21,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667118921] [2021-11-20 06:36:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:21,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:22,089 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 06:36:22,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:22,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667118921] [2021-11-20 06:36:22,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667118921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:22,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:22,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:36:22,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507585886] [2021-11-20 06:36:22,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:22,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:36:22,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:22,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:36:22,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:36:22,093 INFO L87 Difference]: Start difference. First operand 2181 states and 3365 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:22,575 INFO L93 Difference]: Finished difference Result 4311 states and 6677 transitions. [2021-11-20 06:36:22,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:36:22,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-20 06:36:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:22,592 INFO L225 Difference]: With dead ends: 4311 [2021-11-20 06:36:22,593 INFO L226 Difference]: Without dead ends: 2181 [2021-11-20 06:36:22,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:36:22,600 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 644 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:22,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 139 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:36:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-11-20 06:36:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2021-11-20 06:36:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.5293577981651376) internal successors, (3334), 2180 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3334 transitions. [2021-11-20 06:36:22,952 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3334 transitions. Word has length 94 [2021-11-20 06:36:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:22,952 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3334 transitions. [2021-11-20 06:36:22,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3334 transitions. [2021-11-20 06:36:22,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 06:36:22,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:22,955 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] [2021-11-20 06:36:22,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:36:22,956 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1521549230, now seen corresponding path program 1 times [2021-11-20 06:36:22,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:22,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347147553] [2021-11-20 06:36:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:22,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:36:23,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:23,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347147553] [2021-11-20 06:36:23,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347147553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:23,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:23,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:36:23,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489468156] [2021-11-20 06:36:23,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:23,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:36:23,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:23,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:36:23,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:36:23,076 INFO L87 Difference]: Start difference. First operand 2181 states and 3334 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:23,663 INFO L93 Difference]: Finished difference Result 4315 states and 6620 transitions. [2021-11-20 06:36:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:36:23,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-20 06:36:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:23,680 INFO L225 Difference]: With dead ends: 4315 [2021-11-20 06:36:23,681 INFO L226 Difference]: Without dead ends: 2181 [2021-11-20 06:36:23,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:36:23,687 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 649 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:23,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 131 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:36:23,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-11-20 06:36:24,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2021-11-20 06:36:24,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.515137614678899) internal successors, (3303), 2180 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:24,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3303 transitions. [2021-11-20 06:36:24,051 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3303 transitions. Word has length 95 [2021-11-20 06:36:24,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:24,052 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3303 transitions. [2021-11-20 06:36:24,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3303 transitions. [2021-11-20 06:36:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 06:36:24,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:24,055 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] [2021-11-20 06:36:24,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:36:24,056 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:24,057 INFO L85 PathProgramCache]: Analyzing trace with hash -824700769, now seen corresponding path program 1 times [2021-11-20 06:36:24,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:24,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593197459] [2021-11-20 06:36:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:24,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:24,167 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 06:36:24,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:24,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593197459] [2021-11-20 06:36:24,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593197459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:24,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:24,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:36:24,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45957157] [2021-11-20 06:36:24,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:24,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:36:24,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:36:24,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:36:24,171 INFO L87 Difference]: Start difference. First operand 2181 states and 3303 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:24,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:24,682 INFO L93 Difference]: Finished difference Result 4299 states and 6540 transitions. [2021-11-20 06:36:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:36:24,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-20 06:36:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:24,700 INFO L225 Difference]: With dead ends: 4299 [2021-11-20 06:36:24,700 INFO L226 Difference]: Without dead ends: 2181 [2021-11-20 06:36:24,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:36:24,706 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 597 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:24,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 163 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:36:24,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-11-20 06:36:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2021-11-20 06:36:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.5009174311926605) internal successors, (3272), 2180 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3272 transitions. [2021-11-20 06:36:25,063 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3272 transitions. Word has length 96 [2021-11-20 06:36:25,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:25,064 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3272 transitions. [2021-11-20 06:36:25,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3272 transitions. [2021-11-20 06:36:25,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 06:36:25,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:25,067 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] [2021-11-20 06:36:25,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:36:25,068 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:25,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:25,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1248287654, now seen corresponding path program 1 times [2021-11-20 06:36:25,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:25,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401503106] [2021-11-20 06:36:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:25,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:25,163 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 06:36:25,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:25,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401503106] [2021-11-20 06:36:25,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401503106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:25,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:25,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:36:25,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551327455] [2021-11-20 06:36:25,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:25,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:36:25,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:25,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:36:25,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:36:25,167 INFO L87 Difference]: Start difference. First operand 2181 states and 3272 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:25,707 INFO L93 Difference]: Finished difference Result 4303 states and 6483 transitions. [2021-11-20 06:36:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:36:25,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-20 06:36:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:25,724 INFO L225 Difference]: With dead ends: 4303 [2021-11-20 06:36:25,724 INFO L226 Difference]: Without dead ends: 2181 [2021-11-20 06:36:25,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:36:25,729 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 602 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:25,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 155 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:36:25,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-11-20 06:36:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2021-11-20 06:36:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.486697247706422) internal successors, (3241), 2180 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3241 transitions. [2021-11-20 06:36:26,132 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3241 transitions. Word has length 97 [2021-11-20 06:36:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:26,133 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3241 transitions. [2021-11-20 06:36:26,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:26,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3241 transitions. [2021-11-20 06:36:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:36:26,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:26,136 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] [2021-11-20 06:36:26,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:36:26,137 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:26,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:26,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1071880717, now seen corresponding path program 1 times [2021-11-20 06:36:26,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:26,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694332011] [2021-11-20 06:36:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:26,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:36:26,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:26,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694332011] [2021-11-20 06:36:26,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694332011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:26,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:26,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:36:26,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022192091] [2021-11-20 06:36:26,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:26,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:36:26,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:26,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:36:26,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:36:26,238 INFO L87 Difference]: Start difference. First operand 2181 states and 3241 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:26,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:26,800 INFO L93 Difference]: Finished difference Result 4307 states and 6426 transitions. [2021-11-20 06:36:26,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:36:26,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-20 06:36:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:26,826 INFO L225 Difference]: With dead ends: 4307 [2021-11-20 06:36:26,833 INFO L226 Difference]: Without dead ends: 2181 [2021-11-20 06:36:26,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:36:26,839 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 607 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:26,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 147 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:36:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-11-20 06:36:27,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2021-11-20 06:36:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.4724770642201834) internal successors, (3210), 2180 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3210 transitions. [2021-11-20 06:36:27,219 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3210 transitions. Word has length 98 [2021-11-20 06:36:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:27,219 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3210 transitions. [2021-11-20 06:36:27,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:27,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3210 transitions. [2021-11-20 06:36:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 06:36:27,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:27,222 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] [2021-11-20 06:36:27,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:36:27,223 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:27,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:27,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2092778770, now seen corresponding path program 1 times [2021-11-20 06:36:27,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:27,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627675124] [2021-11-20 06:36:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:27,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:27,334 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 06:36:27,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:27,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627675124] [2021-11-20 06:36:27,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627675124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:27,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:27,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:36:27,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869744937] [2021-11-20 06:36:27,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:27,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:36:27,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:27,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:36:27,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:36:27,338 INFO L87 Difference]: Start difference. First operand 2181 states and 3210 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:27,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:27,924 INFO L93 Difference]: Finished difference Result 4295 states and 6352 transitions. [2021-11-20 06:36:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:36:27,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-20 06:36:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:27,945 INFO L225 Difference]: With dead ends: 4295 [2021-11-20 06:36:27,950 INFO L226 Difference]: Without dead ends: 2181 [2021-11-20 06:36:27,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:36:27,953 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 565 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:27,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 171 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:36:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-11-20 06:36:28,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2021-11-20 06:36:28,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.4582568807339449) internal successors, (3179), 2180 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3179 transitions. [2021-11-20 06:36:28,338 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3179 transitions. Word has length 99 [2021-11-20 06:36:28,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:28,338 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3179 transitions. [2021-11-20 06:36:28,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:28,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3179 transitions. [2021-11-20 06:36:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:36:28,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:28,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:28,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:36:28,342 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:28,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1190401161, now seen corresponding path program 1 times [2021-11-20 06:36:28,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:28,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740309997] [2021-11-20 06:36:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:28,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:28,453 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 06:36:28,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:28,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740309997] [2021-11-20 06:36:28,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740309997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:28,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:28,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:36:28,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113189065] [2021-11-20 06:36:28,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:28,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:36:28,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:28,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:36:28,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:36:28,457 INFO L87 Difference]: Start difference. First operand 2181 states and 3179 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:29,198 INFO L93 Difference]: Finished difference Result 3577 states and 5229 transitions. [2021-11-20 06:36:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:36:29,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-20 06:36:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:29,210 INFO L225 Difference]: With dead ends: 3577 [2021-11-20 06:36:29,211 INFO L226 Difference]: Without dead ends: 3575 [2021-11-20 06:36:29,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:36:29,214 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 196 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:29,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 913 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:36:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-11-20 06:36:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2195. [2021-11-20 06:36:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 1.451686417502279) internal successors, (3185), 2194 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:29,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 3185 transitions. [2021-11-20 06:36:29,762 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 3185 transitions. Word has length 100 [2021-11-20 06:36:29,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:29,762 INFO L470 AbstractCegarLoop]: Abstraction has 2195 states and 3185 transitions. [2021-11-20 06:36:29,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 3185 transitions. [2021-11-20 06:36:29,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:36:29,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:29,766 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] [2021-11-20 06:36:29,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:36:29,767 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:29,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:29,767 INFO L85 PathProgramCache]: Analyzing trace with hash 97282675, now seen corresponding path program 1 times [2021-11-20 06:36:29,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:29,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332109878] [2021-11-20 06:36:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:29,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:30,238 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 06:36:30,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:30,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332109878] [2021-11-20 06:36:30,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332109878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:30,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:30,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:36:30,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662914430] [2021-11-20 06:36:30,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:30,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:36:30,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:30,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:36:30,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:36:30,243 INFO L87 Difference]: Start difference. First operand 2195 states and 3185 transitions. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:32,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:32,086 INFO L93 Difference]: Finished difference Result 6332 states and 9203 transitions. [2021-11-20 06:36:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:36:32,089 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-20 06:36:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:32,100 INFO L225 Difference]: With dead ends: 6332 [2021-11-20 06:36:32,101 INFO L226 Difference]: Without dead ends: 4306 [2021-11-20 06:36:32,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:36:32,107 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 1255 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:32,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1255 Valid, 598 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:36:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-11-20 06:36:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 2195. [2021-11-20 06:36:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 1.4489516864175023) internal successors, (3179), 2194 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 3179 transitions. [2021-11-20 06:36:32,518 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 3179 transitions. Word has length 100 [2021-11-20 06:36:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:32,518 INFO L470 AbstractCegarLoop]: Abstraction has 2195 states and 3179 transitions. [2021-11-20 06:36:32,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 3179 transitions. [2021-11-20 06:36:32,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:36:32,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:32,521 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] [2021-11-20 06:36:32,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:36:32,522 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:32,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:32,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1807427751, now seen corresponding path program 1 times [2021-11-20 06:36:32,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:32,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423589857] [2021-11-20 06:36:32,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:32,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:32,881 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 06:36:32,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:32,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423589857] [2021-11-20 06:36:32,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423589857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:32,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:32,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:36:32,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661306548] [2021-11-20 06:36:32,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:32,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:36:32,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:32,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:36:32,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:36:32,884 INFO L87 Difference]: Start difference. First operand 2195 states and 3179 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:34,680 INFO L93 Difference]: Finished difference Result 6407 states and 9307 transitions. [2021-11-20 06:36:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:36:34,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-20 06:36:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:34,690 INFO L225 Difference]: With dead ends: 6407 [2021-11-20 06:36:34,691 INFO L226 Difference]: Without dead ends: 4336 [2021-11-20 06:36:34,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:36:34,697 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 1670 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:34,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 524 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:36:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-11-20 06:36:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 2195. [2021-11-20 06:36:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 1.4471285323609846) internal successors, (3175), 2194 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 3175 transitions. [2021-11-20 06:36:35,343 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 3175 transitions. Word has length 101 [2021-11-20 06:36:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:35,344 INFO L470 AbstractCegarLoop]: Abstraction has 2195 states and 3175 transitions. [2021-11-20 06:36:35,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 3175 transitions. [2021-11-20 06:36:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:36:35,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:35,347 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] [2021-11-20 06:36:35,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:36:35,348 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:35,349 INFO L85 PathProgramCache]: Analyzing trace with hash -721716891, now seen corresponding path program 1 times [2021-11-20 06:36:35,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:35,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268760492] [2021-11-20 06:36:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:35,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:35,715 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 06:36:35,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:35,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268760492] [2021-11-20 06:36:35,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268760492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:35,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:35,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:36:35,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618069372] [2021-11-20 06:36:35,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:35,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:36:35,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:35,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:36:35,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:36:35,719 INFO L87 Difference]: Start difference. First operand 2195 states and 3175 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:37,609 INFO L93 Difference]: Finished difference Result 6422 states and 9323 transitions. [2021-11-20 06:36:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:36:37,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-20 06:36:37,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:37,623 INFO L225 Difference]: With dead ends: 6422 [2021-11-20 06:36:37,623 INFO L226 Difference]: Without dead ends: 4341 [2021-11-20 06:36:37,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:36:37,629 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 1345 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:37,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1345 Valid, 522 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:36:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4341 states. [2021-11-20 06:36:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4341 to 2195. [2021-11-20 06:36:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 1.4462169553327255) internal successors, (3173), 2194 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 3173 transitions. [2021-11-20 06:36:38,231 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 3173 transitions. Word has length 101 [2021-11-20 06:36:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:38,232 INFO L470 AbstractCegarLoop]: Abstraction has 2195 states and 3173 transitions. [2021-11-20 06:36:38,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 3173 transitions. [2021-11-20 06:36:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 06:36:38,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:38,235 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] [2021-11-20 06:36:38,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 06:36:38,235 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1570910188, now seen corresponding path program 1 times [2021-11-20 06:36:38,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:38,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315191060] [2021-11-20 06:36:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:38,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:36:38,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:38,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315191060] [2021-11-20 06:36:38,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315191060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:38,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:38,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:36:38,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435765018] [2021-11-20 06:36:38,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:38,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:36:38,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:38,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:36:38,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:36:38,466 INFO L87 Difference]: Start difference. First operand 2195 states and 3173 transitions. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:39,947 INFO L93 Difference]: Finished difference Result 6277 states and 9131 transitions. [2021-11-20 06:36:39,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:36:39,948 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-20 06:36:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:39,956 INFO L225 Difference]: With dead ends: 6277 [2021-11-20 06:36:39,956 INFO L226 Difference]: Without dead ends: 4191 [2021-11-20 06:36:39,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:36:39,962 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 1643 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1643 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:39,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1643 Valid, 389 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:36:39,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-11-20 06:36:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 2195. [2021-11-20 06:36:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 1.4457611668185961) internal successors, (3172), 2194 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 3172 transitions. [2021-11-20 06:36:40,497 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 3172 transitions. Word has length 102 [2021-11-20 06:36:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:40,497 INFO L470 AbstractCegarLoop]: Abstraction has 2195 states and 3172 transitions. [2021-11-20 06:36:40,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 3172 transitions. [2021-11-20 06:36:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 06:36:40,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:40,500 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] [2021-11-20 06:36:40,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:36:40,501 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:40,502 INFO L85 PathProgramCache]: Analyzing trace with hash 755224923, now seen corresponding path program 1 times [2021-11-20 06:36:40,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:40,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327746310] [2021-11-20 06:36:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:40,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:41,022 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 06:36:41,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:41,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327746310] [2021-11-20 06:36:41,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327746310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:41,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:41,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:36:41,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670681500] [2021-11-20 06:36:41,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:41,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:36:41,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:41,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:36:41,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:36:41,026 INFO L87 Difference]: Start difference. First operand 2195 states and 3172 transitions. Second operand has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:56,392 INFO L93 Difference]: Finished difference Result 46937 states and 68046 transitions. [2021-11-20 06:36:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 06:36:56,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-20 06:36:56,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:56,497 INFO L225 Difference]: With dead ends: 46937 [2021-11-20 06:36:56,497 INFO L226 Difference]: Without dead ends: 44886 [2021-11-20 06:36:56,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 06:36:56,516 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 4935 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4935 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:56,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4935 Valid, 1738 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 06:36:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44886 states. [2021-11-20 06:36:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44886 to 2207. [2021-11-20 06:36:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 1.442883046237534) internal successors, (3183), 2206 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 3183 transitions. [2021-11-20 06:36:57,877 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 3183 transitions. Word has length 103 [2021-11-20 06:36:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:57,878 INFO L470 AbstractCegarLoop]: Abstraction has 2207 states and 3183 transitions. [2021-11-20 06:36:57,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 3183 transitions. [2021-11-20 06:36:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 06:36:57,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:57,881 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] [2021-11-20 06:36:57,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:36:57,882 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:57,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:57,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1394810664, now seen corresponding path program 1 times [2021-11-20 06:36:57,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:57,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382150002] [2021-11-20 06:36:57,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:57,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:58,125 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 06:36:58,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:58,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382150002] [2021-11-20 06:36:58,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382150002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:58,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:58,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:36:58,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083146723] [2021-11-20 06:36:58,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:58,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:36:58,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:58,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:36:58,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:36:58,128 INFO L87 Difference]: Start difference. First operand 2207 states and 3183 transitions. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:00,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:00,825 INFO L93 Difference]: Finished difference Result 6289 states and 9113 transitions. [2021-11-20 06:37:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:37:00,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-20 06:37:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:00,836 INFO L225 Difference]: With dead ends: 6289 [2021-11-20 06:37:00,836 INFO L226 Difference]: Without dead ends: 4293 [2021-11-20 06:37:00,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:37:00,843 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 939 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:00,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 642 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:37:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2021-11-20 06:37:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 2207. [2021-11-20 06:37:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 1.4397098821396193) internal successors, (3176), 2206 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 3176 transitions. [2021-11-20 06:37:01,940 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 3176 transitions. Word has length 104 [2021-11-20 06:37:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:01,941 INFO L470 AbstractCegarLoop]: Abstraction has 2207 states and 3176 transitions. [2021-11-20 06:37:01,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:01,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 3176 transitions. [2021-11-20 06:37:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 06:37:01,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:01,944 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] [2021-11-20 06:37:01,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 06:37:01,945 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:37:01,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:01,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1475383422, now seen corresponding path program 1 times [2021-11-20 06:37:01,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:01,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091937882] [2021-11-20 06:37:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:01,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:02,605 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 06:37:02,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:02,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091937882] [2021-11-20 06:37:02,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091937882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:37:02,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:37:02,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 06:37:02,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881434719] [2021-11-20 06:37:02,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:37:02,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:37:02,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:02,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:37:02,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:37:02,608 INFO L87 Difference]: Start difference. First operand 2207 states and 3176 transitions. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:11,069 INFO L93 Difference]: Finished difference Result 16899 states and 24606 transitions. [2021-11-20 06:37:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:37:11,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-20 06:37:11,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:11,090 INFO L225 Difference]: With dead ends: 16899 [2021-11-20 06:37:11,091 INFO L226 Difference]: Without dead ends: 16345 [2021-11-20 06:37:11,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:37:11,096 INFO L933 BasicCegarLoop]: 601 mSDtfsCounter, 1993 mSDsluCounter, 4053 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 4654 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:11,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1993 Valid, 4654 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:37:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16345 states. [2021-11-20 06:37:12,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16345 to 2196. [2021-11-20 06:37:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 1.4378132118451026) internal successors, (3156), 2195 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 3156 transitions. [2021-11-20 06:37:12,123 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 3156 transitions. Word has length 105 [2021-11-20 06:37:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:12,124 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 3156 transitions. [2021-11-20 06:37:12,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:12,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 3156 transitions. [2021-11-20 06:37:12,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 06:37:12,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:12,126 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] [2021-11-20 06:37:12,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 06:37:12,127 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:37:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:12,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2129597379, now seen corresponding path program 1 times [2021-11-20 06:37:12,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:12,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855440713] [2021-11-20 06:37:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:12,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:12,744 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 06:37:12,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:12,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855440713] [2021-11-20 06:37:12,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855440713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:37:12,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:37:12,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 06:37:12,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558614460] [2021-11-20 06:37:12,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:37:12,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:37:12,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:12,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:37:12,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:37:12,747 INFO L87 Difference]: Start difference. First operand 2196 states and 3156 transitions. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:20,664 INFO L93 Difference]: Finished difference Result 12887 states and 18736 transitions. [2021-11-20 06:37:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:37:20,665 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-20 06:37:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:20,683 INFO L225 Difference]: With dead ends: 12887 [2021-11-20 06:37:20,683 INFO L226 Difference]: Without dead ends: 12307 [2021-11-20 06:37:20,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:37:20,688 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 1550 mSDsluCounter, 4068 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 4627 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:20,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1550 Valid, 4627 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:37:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12307 states. [2021-11-20 06:37:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12307 to 2164. [2021-11-20 06:37:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 1.4382801664355063) internal successors, (3111), 2163 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 3111 transitions. [2021-11-20 06:37:21,953 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 3111 transitions. Word has length 105 [2021-11-20 06:37:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:21,954 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 3111 transitions. [2021-11-20 06:37:21,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 3111 transitions. [2021-11-20 06:37:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 06:37:21,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:21,956 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] [2021-11-20 06:37:21,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 06:37:21,957 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:37:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:21,958 INFO L85 PathProgramCache]: Analyzing trace with hash -285463969, now seen corresponding path program 1 times [2021-11-20 06:37:21,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:21,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026166747] [2021-11-20 06:37:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:21,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:22,517 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 06:37:22,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:22,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026166747] [2021-11-20 06:37:22,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026166747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:37:22,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:37:22,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 06:37:22,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102795062] [2021-11-20 06:37:22,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:37:22,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:37:22,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:22,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:37:22,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:37:22,520 INFO L87 Difference]: Start difference. First operand 2164 states and 3111 transitions. Second operand has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:28,537 INFO L93 Difference]: Finished difference Result 8697 states and 12642 transitions. [2021-11-20 06:37:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:37:28,538 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-20 06:37:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:28,548 INFO L225 Difference]: With dead ends: 8697 [2021-11-20 06:37:28,548 INFO L226 Difference]: Without dead ends: 8163 [2021-11-20 06:37:28,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:37:28,553 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 1658 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 1993 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:28,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1658 Valid, 1993 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:37:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2021-11-20 06:37:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 2163. [2021-11-20 06:37:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 1.4361702127659575) internal successors, (3105), 2162 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3105 transitions. [2021-11-20 06:37:29,841 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3105 transitions. Word has length 105 [2021-11-20 06:37:29,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:29,841 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 3105 transitions. [2021-11-20 06:37:29,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:29,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3105 transitions. [2021-11-20 06:37:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 06:37:29,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:29,843 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] [2021-11-20 06:37:29,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 06:37:29,843 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:37:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:29,844 INFO L85 PathProgramCache]: Analyzing trace with hash -344221858, now seen corresponding path program 1 times [2021-11-20 06:37:29,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:29,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943914323] [2021-11-20 06:37:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:29,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:33,010 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 06:37:33,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:33,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943914323] [2021-11-20 06:37:33,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943914323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:37:33,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:37:33,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-11-20 06:37:33,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759394824] [2021-11-20 06:37:33,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:37:33,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:37:33,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:33,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:37:33,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:37:33,013 INFO L87 Difference]: Start difference. First operand 2163 states and 3105 transitions. Second operand has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:59,458 INFO L93 Difference]: Finished difference Result 17484 states and 25402 transitions. [2021-11-20 06:37:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 06:37:59,459 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-20 06:37:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:59,482 INFO L225 Difference]: With dead ends: 17484 [2021-11-20 06:37:59,482 INFO L226 Difference]: Without dead ends: 16950 [2021-11-20 06:37:59,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-11-20 06:37:59,489 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 2855 mSDsluCounter, 15453 mSDsCounter, 0 mSdLazyCounter, 10645 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2855 SdHoareTripleChecker+Valid, 16116 SdHoareTripleChecker+Invalid, 10739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 10645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:59,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2855 Valid, 16116 Invalid, 10739 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [94 Valid, 10645 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2021-11-20 06:37:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16950 states. [2021-11-20 06:38:01,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16950 to 2189. [2021-11-20 06:38:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 1.4337294332723949) internal successors, (3137), 2188 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 3137 transitions. [2021-11-20 06:38:01,072 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 3137 transitions. Word has length 105 [2021-11-20 06:38:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:01,073 INFO L470 AbstractCegarLoop]: Abstraction has 2189 states and 3137 transitions. [2021-11-20 06:38:01,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 3137 transitions. [2021-11-20 06:38:01,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 06:38:01,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:01,075 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] [2021-11-20 06:38:01,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 06:38:01,076 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:01,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:01,077 INFO L85 PathProgramCache]: Analyzing trace with hash 716052892, now seen corresponding path program 1 times [2021-11-20 06:38:01,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:01,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580226100] [2021-11-20 06:38:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:01,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:01,517 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 06:38:01,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:01,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580226100] [2021-11-20 06:38:01,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580226100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:01,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:01,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:38:01,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047760940] [2021-11-20 06:38:01,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:01,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:38:01,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:01,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:38:01,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:38:01,520 INFO L87 Difference]: Start difference. First operand 2189 states and 3137 transitions. Second operand has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:11,517 INFO L93 Difference]: Finished difference Result 12733 states and 18515 transitions. [2021-11-20 06:38:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:38:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-20 06:38:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:11,532 INFO L225 Difference]: With dead ends: 12733 [2021-11-20 06:38:11,532 INFO L226 Difference]: Without dead ends: 12156 [2021-11-20 06:38:11,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:38:11,537 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 1674 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1674 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:11,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1674 Valid, 1946 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:38:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12156 states. [2021-11-20 06:38:13,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12156 to 2150. [2021-11-20 06:38:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.436016751977664) internal successors, (3086), 2149 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3086 transitions. [2021-11-20 06:38:13,208 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3086 transitions. Word has length 105 [2021-11-20 06:38:13,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:13,209 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3086 transitions. [2021-11-20 06:38:13,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3086 transitions. [2021-11-20 06:38:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:38:13,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:13,211 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] [2021-11-20 06:38:13,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 06:38:13,211 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:13,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:13,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1769318287, now seen corresponding path program 1 times [2021-11-20 06:38:13,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:13,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482804157] [2021-11-20 06:38:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:13,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:13,934 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 06:38:13,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:13,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482804157] [2021-11-20 06:38:13,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482804157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:13,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:13,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-20 06:38:13,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034313336] [2021-11-20 06:38:13,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:13,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:38:13,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:13,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:38:13,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:38:13,937 INFO L87 Difference]: Start difference. First operand 2150 states and 3086 transitions. Second operand has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 18 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:26,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:26,191 INFO L93 Difference]: Finished difference Result 13280 states and 19312 transitions. [2021-11-20 06:38:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:38:26,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 18 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-20 06:38:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:26,208 INFO L225 Difference]: With dead ends: 13280 [2021-11-20 06:38:26,208 INFO L226 Difference]: Without dead ends: 12726 [2021-11-20 06:38:26,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:38:26,212 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 1563 mSDsluCounter, 4876 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1563 SdHoareTripleChecker+Valid, 5508 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:26,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1563 Valid, 5508 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:38:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12726 states. [2021-11-20 06:38:27,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12726 to 2155. [2021-11-20 06:38:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 1.435468895078923) internal successors, (3092), 2154 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:28,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 3092 transitions. [2021-11-20 06:38:28,004 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 3092 transitions. Word has length 106 [2021-11-20 06:38:28,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:28,004 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 3092 transitions. [2021-11-20 06:38:28,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 18 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 3092 transitions. [2021-11-20 06:38:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:38:28,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:28,006 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] [2021-11-20 06:38:28,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 06:38:28,007 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:28,008 INFO L85 PathProgramCache]: Analyzing trace with hash 392357586, now seen corresponding path program 1 times [2021-11-20 06:38:28,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:28,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512437032] [2021-11-20 06:38:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:28,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:30,409 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 06:38:30,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512437032] [2021-11-20 06:38:30,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512437032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:30,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:30,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-11-20 06:38:30,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594568593] [2021-11-20 06:38:30,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:30,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 06:38:30,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:30,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 06:38:30,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:38:30,412 INFO L87 Difference]: Start difference. First operand 2155 states and 3092 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:59,599 INFO L93 Difference]: Finished difference Result 20224 states and 29434 transitions. [2021-11-20 06:38:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 06:38:59,599 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-20 06:38:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:59,625 INFO L225 Difference]: With dead ends: 20224 [2021-11-20 06:38:59,626 INFO L226 Difference]: Without dead ends: 18233 [2021-11-20 06:38:59,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=742, Invalid=4088, Unknown=0, NotChecked=0, Total=4830 [2021-11-20 06:38:59,635 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 3232 mSDsluCounter, 15583 mSDsCounter, 0 mSdLazyCounter, 10325 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3232 SdHoareTripleChecker+Valid, 16320 SdHoareTripleChecker+Invalid, 10421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 10325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:59,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3232 Valid, 16320 Invalid, 10421 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 10325 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-11-20 06:38:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18233 states. [2021-11-20 06:39:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18233 to 2172. [2021-11-20 06:39:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2171 states have (on average 1.4334408106863197) internal successors, (3112), 2171 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 3112 transitions. [2021-11-20 06:39:01,626 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 3112 transitions. Word has length 106 [2021-11-20 06:39:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:01,626 INFO L470 AbstractCegarLoop]: Abstraction has 2172 states and 3112 transitions. [2021-11-20 06:39:01,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:01,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 3112 transitions. [2021-11-20 06:39:01,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:39:01,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:01,629 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] [2021-11-20 06:39:01,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 06:39:01,629 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:01,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1575291187, now seen corresponding path program 1 times [2021-11-20 06:39:01,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:01,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139806477] [2021-11-20 06:39:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:01,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:02,555 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 06:39:02,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:02,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139806477] [2021-11-20 06:39:02,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139806477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:02,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:02,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-20 06:39:02,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012309993] [2021-11-20 06:39:02,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:02,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:39:02,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:02,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:39:02,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:39:02,557 INFO L87 Difference]: Start difference. First operand 2172 states and 3112 transitions. Second operand has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:26,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:26,773 INFO L93 Difference]: Finished difference Result 23347 states and 34011 transitions. [2021-11-20 06:39:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:39:26,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-20 06:39:26,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:26,807 INFO L225 Difference]: With dead ends: 23347 [2021-11-20 06:39:26,808 INFO L226 Difference]: Without dead ends: 22803 [2021-11-20 06:39:26,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 06:39:26,816 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 2583 mSDsluCounter, 7849 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2583 SdHoareTripleChecker+Valid, 8501 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:26,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2583 Valid, 8501 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 06:39:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22803 states. [2021-11-20 06:39:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22803 to 2182. [2021-11-20 06:39:29,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 1.432370472260431) internal successors, (3124), 2181 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 3124 transitions. [2021-11-20 06:39:29,043 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 3124 transitions. Word has length 106 [2021-11-20 06:39:29,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:29,044 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 3124 transitions. [2021-11-20 06:39:29,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 3124 transitions. [2021-11-20 06:39:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:39:29,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:29,046 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] [2021-11-20 06:39:29,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 06:39:29,046 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:29,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:29,047 INFO L85 PathProgramCache]: Analyzing trace with hash -564035343, now seen corresponding path program 1 times [2021-11-20 06:39:29,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:29,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787443274] [2021-11-20 06:39:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:29,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:29,537 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 06:39:29,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:29,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787443274] [2021-11-20 06:39:29,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787443274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:29,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:29,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 06:39:29,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164336999] [2021-11-20 06:39:29,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:29,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:39:29,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:29,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:39:29,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:39:29,541 INFO L87 Difference]: Start difference. First operand 2182 states and 3124 transitions. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:39,034 INFO L93 Difference]: Finished difference Result 8759 states and 12710 transitions. [2021-11-20 06:39:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:39:39,034 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-20 06:39:39,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:39,044 INFO L225 Difference]: With dead ends: 8759 [2021-11-20 06:39:39,044 INFO L226 Difference]: Without dead ends: 8183 [2021-11-20 06:39:39,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:39:39,048 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 2098 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 2347 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:39,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2098 Valid, 2347 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:39:39,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8183 states. [2021-11-20 06:39:41,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8183 to 2132. [2021-11-20 06:39:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 1.4368840919755983) internal successors, (3062), 2131 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3062 transitions. [2021-11-20 06:39:41,362 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3062 transitions. Word has length 106 [2021-11-20 06:39:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:41,362 INFO L470 AbstractCegarLoop]: Abstraction has 2132 states and 3062 transitions. [2021-11-20 06:39:41,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3062 transitions. [2021-11-20 06:39:41,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:39:41,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:41,364 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] [2021-11-20 06:39:41,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-20 06:39:41,365 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:41,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:41,365 INFO L85 PathProgramCache]: Analyzing trace with hash 255793872, now seen corresponding path program 1 times [2021-11-20 06:39:41,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:41,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60590950] [2021-11-20 06:39:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:41,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:41,609 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 06:39:41,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:41,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60590950] [2021-11-20 06:39:41,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60590950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:41,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:41,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:39:41,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816303216] [2021-11-20 06:39:41,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:41,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:39:41,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:41,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:39:41,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:39:41,612 INFO L87 Difference]: Start difference. First operand 2132 states and 3062 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:46,894 INFO L93 Difference]: Finished difference Result 6211 states and 8981 transitions. [2021-11-20 06:39:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:39:46,895 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-20 06:39:46,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:46,900 INFO L225 Difference]: With dead ends: 6211 [2021-11-20 06:39:46,901 INFO L226 Difference]: Without dead ends: 4205 [2021-11-20 06:39:46,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:39:46,905 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 1143 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:46,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 641 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:39:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4205 states. [2021-11-20 06:39:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4205 to 2129. [2021-11-20 06:39:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 1.4370300751879699) internal successors, (3058), 2128 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 3058 transitions. [2021-11-20 06:39:49,101 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 3058 transitions. Word has length 106 [2021-11-20 06:39:49,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:49,102 INFO L470 AbstractCegarLoop]: Abstraction has 2129 states and 3058 transitions. [2021-11-20 06:39:49,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:49,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 3058 transitions. [2021-11-20 06:39:49,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-20 06:39:49,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:49,103 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] [2021-11-20 06:39:49,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-20 06:39:49,104 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:49,105 INFO L85 PathProgramCache]: Analyzing trace with hash -835958753, now seen corresponding path program 1 times [2021-11-20 06:39:49,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:49,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524504028] [2021-11-20 06:39:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:49,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:49,751 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 06:39:49,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:49,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524504028] [2021-11-20 06:39:49,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524504028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:49,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:49,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 06:39:49,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947183817] [2021-11-20 06:39:49,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:49,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:39:49,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:39:49,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:39:49,753 INFO L87 Difference]: Start difference. First operand 2129 states and 3058 transitions. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:05,039 INFO L93 Difference]: Finished difference Result 12624 states and 18376 transitions. [2021-11-20 06:40:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:40:05,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-20 06:40:05,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:05,055 INFO L225 Difference]: With dead ends: 12624 [2021-11-20 06:40:05,055 INFO L226 Difference]: Without dead ends: 12082 [2021-11-20 06:40:05,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:40:05,059 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 1422 mSDsluCounter, 3543 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1422 SdHoareTripleChecker+Valid, 4032 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:05,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1422 Valid, 4032 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:40:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12082 states. [2021-11-20 06:40:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12082 to 2113. [2021-11-20 06:40:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 1.4384469696969697) internal successors, (3038), 2112 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 3038 transitions. [2021-11-20 06:40:07,488 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 3038 transitions. Word has length 107 [2021-11-20 06:40:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:07,488 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 3038 transitions. [2021-11-20 06:40:07,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:07,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 3038 transitions. [2021-11-20 06:40:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-20 06:40:07,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:07,489 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] [2021-11-20 06:40:07,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 06:40:07,490 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:07,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1041143963, now seen corresponding path program 1 times [2021-11-20 06:40:07,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:07,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849947979] [2021-11-20 06:40:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:07,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:07,607 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 06:40:07,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:07,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849947979] [2021-11-20 06:40:07,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849947979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:07,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:07,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:40:07,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649488148] [2021-11-20 06:40:07,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:07,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:40:07,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:40:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:40:07,611 INFO L87 Difference]: Start difference. First operand 2113 states and 3038 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:11,393 INFO L93 Difference]: Finished difference Result 4930 states and 7153 transitions. [2021-11-20 06:40:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:40:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-20 06:40:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:11,398 INFO L225 Difference]: With dead ends: 4930 [2021-11-20 06:40:11,398 INFO L226 Difference]: Without dead ends: 2941 [2021-11-20 06:40:11,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:40:11,401 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 174 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:11,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 607 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:40:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-11-20 06:40:14,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2939. [2021-11-20 06:40:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2938 states have (on average 1.439074200136147) internal successors, (4228), 2938 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 4228 transitions. [2021-11-20 06:40:14,738 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 4228 transitions. Word has length 107 [2021-11-20 06:40:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:14,739 INFO L470 AbstractCegarLoop]: Abstraction has 2939 states and 4228 transitions. [2021-11-20 06:40:14,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 4228 transitions. [2021-11-20 06:40:14,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-20 06:40:14,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:14,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:14,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-20 06:40:14,742 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1624576542, now seen corresponding path program 1 times [2021-11-20 06:40:14,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:14,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066566073] [2021-11-20 06:40:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:14,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:14,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:14,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066566073] [2021-11-20 06:40:14,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066566073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:14,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:14,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:40:14,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958919333] [2021-11-20 06:40:14,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:14,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:40:14,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:14,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:40:14,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:40:14,826 INFO L87 Difference]: Start difference. First operand 2939 states and 4228 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:19,603 INFO L93 Difference]: Finished difference Result 6060 states and 8760 transitions. [2021-11-20 06:40:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:40:19,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-20 06:40:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:19,609 INFO L225 Difference]: With dead ends: 6060 [2021-11-20 06:40:19,609 INFO L226 Difference]: Without dead ends: 4071 [2021-11-20 06:40:19,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:40:19,612 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 98 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:19,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 470 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:40:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-11-20 06:40:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 3945. [2021-11-20 06:40:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 1.4373732251521298) internal successors, (5669), 3944 states have internal predecessors, (5669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 5669 transitions. [2021-11-20 06:40:24,064 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 5669 transitions. Word has length 139 [2021-11-20 06:40:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:24,064 INFO L470 AbstractCegarLoop]: Abstraction has 3945 states and 5669 transitions. [2021-11-20 06:40:24,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 5669 transitions. [2021-11-20 06:40:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 06:40:24,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:24,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:40:24,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-20 06:40:24,068 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1544847095, now seen corresponding path program 1 times [2021-11-20 06:40:24,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:24,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773355095] [2021-11-20 06:40:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:24,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:24,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:24,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773355095] [2021-11-20 06:40:24,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773355095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:24,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:24,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:40:24,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811728347] [2021-11-20 06:40:24,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:24,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:40:24,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:24,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:40:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:40:24,193 INFO L87 Difference]: Start difference. First operand 3945 states and 5669 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:37,062 INFO L93 Difference]: Finished difference Result 14098 states and 20334 transitions. [2021-11-20 06:40:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:40:37,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-20 06:40:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:37,076 INFO L225 Difference]: With dead ends: 14098 [2021-11-20 06:40:37,076 INFO L226 Difference]: Without dead ends: 10286 [2021-11-20 06:40:37,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:40:37,082 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 1810 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1810 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:37,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1810 Valid, 471 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:40:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2021-11-20 06:40:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 4224. [2021-11-20 06:40:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 4223 states have (on average 1.4304996448022733) internal successors, (6041), 4223 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 6041 transitions. [2021-11-20 06:40:42,026 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 6041 transitions. Word has length 141 [2021-11-20 06:40:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:42,027 INFO L470 AbstractCegarLoop]: Abstraction has 4224 states and 6041 transitions. [2021-11-20 06:40:42,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 6041 transitions. [2021-11-20 06:40:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 06:40:42,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:42,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:40:42,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-20 06:40:42,028 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:42,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1628702113, now seen corresponding path program 1 times [2021-11-20 06:40:42,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:42,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164626262] [2021-11-20 06:40:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:42,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:42,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:42,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164626262] [2021-11-20 06:40:42,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164626262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:42,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:42,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:40:42,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954207872] [2021-11-20 06:40:42,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:42,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:40:42,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:40:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:40:42,154 INFO L87 Difference]: Start difference. First operand 4224 states and 6041 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:03,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:03,976 INFO L93 Difference]: Finished difference Result 22176 states and 31789 transitions. [2021-11-20 06:41:03,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:41:03,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-20 06:41:03,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:04,005 INFO L225 Difference]: With dead ends: 22176 [2021-11-20 06:41:04,005 INFO L226 Difference]: Without dead ends: 18094 [2021-11-20 06:41:04,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:41:04,013 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 1693 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:04,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1693 Valid, 438 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:41:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18094 states. [2021-11-20 06:41:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18094 to 8884. [2021-11-20 06:41:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8884 states, 8883 states have (on average 1.4339750084430936) internal successors, (12738), 8883 states have internal predecessors, (12738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8884 states to 8884 states and 12738 transitions. [2021-11-20 06:41:13,668 INFO L78 Accepts]: Start accepts. Automaton has 8884 states and 12738 transitions. Word has length 141 [2021-11-20 06:41:13,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:13,669 INFO L470 AbstractCegarLoop]: Abstraction has 8884 states and 12738 transitions. [2021-11-20 06:41:13,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 8884 states and 12738 transitions. [2021-11-20 06:41:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 06:41:13,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:13,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:13,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-20 06:41:13,671 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1701848944, now seen corresponding path program 1 times [2021-11-20 06:41:13,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:13,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045649394] [2021-11-20 06:41:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:13,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:13,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:13,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045649394] [2021-11-20 06:41:13,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045649394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:13,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:13,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:41:13,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672370563] [2021-11-20 06:41:13,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:13,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:41:13,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:13,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:41:13,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:41:13,815 INFO L87 Difference]: Start difference. First operand 8884 states and 12738 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:54,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:54,358 INFO L93 Difference]: Finished difference Result 44780 states and 63998 transitions. [2021-11-20 06:41:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:41:54,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-20 06:41:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:54,413 INFO L225 Difference]: With dead ends: 44780 [2021-11-20 06:41:54,413 INFO L226 Difference]: Without dead ends: 36038 [2021-11-20 06:41:54,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:41:54,428 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 1526 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:54,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 442 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:41:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36038 states. [2021-11-20 06:42:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36038 to 18784. [2021-11-20 06:42:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18784 states, 18783 states have (on average 1.4344886333386573) internal successors, (26944), 18783 states have internal predecessors, (26944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18784 states to 18784 states and 26944 transitions. [2021-11-20 06:42:13,825 INFO L78 Accepts]: Start accepts. Automaton has 18784 states and 26944 transitions. Word has length 141 [2021-11-20 06:42:13,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:13,826 INFO L470 AbstractCegarLoop]: Abstraction has 18784 states and 26944 transitions. [2021-11-20 06:42:13,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 18784 states and 26944 transitions. [2021-11-20 06:42:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 06:42:13,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:13,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:13,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-20 06:42:13,828 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash 182297884, now seen corresponding path program 1 times [2021-11-20 06:42:13,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:13,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944584832] [2021-11-20 06:42:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:13,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:13,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:13,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944584832] [2021-11-20 06:42:13,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944584832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:13,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:13,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:42:13,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400481952] [2021-11-20 06:42:13,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:13,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:42:13,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:13,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:42:13,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:42:13,942 INFO L87 Difference]: Start difference. First operand 18784 states and 26944 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:25,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:25,919 INFO L93 Difference]: Finished difference Result 84920 states and 121928 transitions. [2021-11-20 06:43:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:43:25,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-20 06:43:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:26,043 INFO L225 Difference]: With dead ends: 84920 [2021-11-20 06:43:26,043 INFO L226 Difference]: Without dead ends: 66278 [2021-11-20 06:43:26,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:43:26,073 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 1868 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1868 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:26,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1868 Valid, 432 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:43:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66278 states. [2021-11-20 06:44:01,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66278 to 39744. [2021-11-20 06:44:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39744 states, 39743 states have (on average 1.4337115970107943) internal successors, (56980), 39743 states have internal predecessors, (56980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39744 states to 39744 states and 56980 transitions. [2021-11-20 06:44:01,272 INFO L78 Accepts]: Start accepts. Automaton has 39744 states and 56980 transitions. Word has length 141 [2021-11-20 06:44:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:01,273 INFO L470 AbstractCegarLoop]: Abstraction has 39744 states and 56980 transitions. [2021-11-20 06:44:01,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 39744 states and 56980 transitions. [2021-11-20 06:44:01,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 06:44:01,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:01,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:01,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-20 06:44:01,275 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:01,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2146985950, now seen corresponding path program 1 times [2021-11-20 06:44:01,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:01,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863153829] [2021-11-20 06:44:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:01,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:44:01,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:01,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863153829] [2021-11-20 06:44:01,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863153829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:01,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:01,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:44:01,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960500793] [2021-11-20 06:44:01,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:01,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:44:01,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:01,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:44:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:44:01,374 INFO L87 Difference]: Start difference. First operand 39744 states and 56980 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)