./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa --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 7a6125f7fd3671a946bbcfb84d914b36dcf28a309f479868ec22e7caec5cb206 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:24:19,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:24:19,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:24:19,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:24:19,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:24:19,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:24:19,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:24:19,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:24:19,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:24:19,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:24:19,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:24:19,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:24:19,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:24:19,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:24:19,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:24:19,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:24:19,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:24:19,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:24:19,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:24:19,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:24:19,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:24:19,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:24:19,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:24:19,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:24:19,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:24:19,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:24:19,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:24:19,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:24:19,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:24:19,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:24:19,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:24:19,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:24:19,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:24:19,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:24:19,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:24:19,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:24:19,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:24:19,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:24:19,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:24:19,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:24:19,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:24:19,610 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:24:19,627 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:24:19,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:24:19,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:24:19,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:24:19,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:24:19,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:24:19,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:24:19,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:24:19,629 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:24:19,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:24:19,629 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:24:19,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:24:19,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:24:19,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:24:19,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:24:19,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:24:19,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:24:19,630 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:24:19,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:24:19,630 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:24:19,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:24:19,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:24:19,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:24:19,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:24:19,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:24:19,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:24:19,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:24:19,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:24:19,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:24:19,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:24:19,632 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:24:19,632 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:24:19,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:24:19,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:24:19,632 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_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a6125f7fd3671a946bbcfb84d914b36dcf28a309f479868ec22e7caec5cb206 [2021-12-06 19:24:19,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:24:19,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:24:19,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:24:19,835 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:24:19,835 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:24:19,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem13_label08.c [2021-12-06 19:24:19,879 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/data/f56e99e5e/af6359edfae1462ab873fe60743ede2d/FLAG07fdf0f3b [2021-12-06 19:24:20,489 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:24:20,490 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/sv-benchmarks/c/eca-rers2012/Problem13_label08.c [2021-12-06 19:24:20,511 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/data/f56e99e5e/af6359edfae1462ab873fe60743ede2d/FLAG07fdf0f3b [2021-12-06 19:24:20,889 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/data/f56e99e5e/af6359edfae1462ab873fe60743ede2d [2021-12-06 19:24:20,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:24:20,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:24:20,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:24:20,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:24:20,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:24:20,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:24:20" (1/1) ... [2021-12-06 19:24:20,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29aa35e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:20, skipping insertion in model container [2021-12-06 19:24:20,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:24:20" (1/1) ... [2021-12-06 19:24:20,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:24:21,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:24:21,321 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_638e7535-1a26-422a-841e-e448781af223/sv-benchmarks/c/eca-rers2012/Problem13_label08.c[7141,7154] [2021-12-06 19:24:22,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:24:22,100 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:24:22,125 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_638e7535-1a26-422a-841e-e448781af223/sv-benchmarks/c/eca-rers2012/Problem13_label08.c[7141,7154] [2021-12-06 19:24:22,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:24:22,610 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:24:22,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:22 WrapperNode [2021-12-06 19:24:22,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:24:22,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:24:22,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:24:22,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:24:22,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:22" (1/1) ... [2021-12-06 19:24:22,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:22" (1/1) ... [2021-12-06 19:24:23,041 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-06 19:24:23,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:24:23,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:24:23,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:24:23,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:24:23,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:22" (1/1) ... [2021-12-06 19:24:23,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:22" (1/1) ... [2021-12-06 19:24:23,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:22" (1/1) ... [2021-12-06 19:24:23,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:22" (1/1) ... [2021-12-06 19:24:23,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:22" (1/1) ... [2021-12-06 19:24:23,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:22" (1/1) ... [2021-12-06 19:24:23,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:22" (1/1) ... [2021-12-06 19:24:23,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:24:23,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:24:23,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:24:23,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:24:23,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:22" (1/1) ... [2021-12-06 19:24:23,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:24:23,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:24:23,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:24:23,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:24:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:24:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:24:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:24:23,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:24:23,560 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:24:23,561 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:24:27,002 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:24:27,020 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:24:27,020 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 19:24:27,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:24:27 BoogieIcfgContainer [2021-12-06 19:24:27,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:24:27,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:24:27,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:24:27,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:24:27,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:24:20" (1/3) ... [2021-12-06 19:24:27,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f4c170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:24:27, skipping insertion in model container [2021-12-06 19:24:27,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:24:22" (2/3) ... [2021-12-06 19:24:27,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f4c170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:24:27, skipping insertion in model container [2021-12-06 19:24:27,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:24:27" (3/3) ... [2021-12-06 19:24:27,029 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label08.c [2021-12-06 19:24:27,032 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:24:27,032 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:24:27,070 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:24:27,076 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:24:27,076 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:24:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 19:24:27,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:24:27,113 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] [2021-12-06 19:24:27,113 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:24:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:27,117 INFO L85 PathProgramCache]: Analyzing trace with hash 761214138, now seen corresponding path program 1 times [2021-12-06 19:24:27,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:27,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120116955] [2021-12-06 19:24:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:27,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:27,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:27,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120116955] [2021-12-06 19:24:27,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120116955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:27,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:27,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:24:27,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869795256] [2021-12-06 19:24:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:27,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:24:27,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:27,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:24:27,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:27,378 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:30,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:24:30,637 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2021-12-06 19:24:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:24:30,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 50 [2021-12-06 19:24:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:24:30,666 INFO L225 Difference]: With dead ends: 3035 [2021-12-06 19:24:30,666 INFO L226 Difference]: Without dead ends: 1873 [2021-12-06 19:24:30,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:30,674 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 855 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:24:30,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 19:24:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-12-06 19:24:30,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2021-12-06 19:24:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2021-12-06 19:24:30,767 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 50 [2021-12-06 19:24:30,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:24:30,767 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2021-12-06 19:24:30,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2021-12-06 19:24:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-06 19:24:30,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:24:30,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:24:30,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:24:30,773 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:24:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:30,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1073959653, now seen corresponding path program 1 times [2021-12-06 19:24:30,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:30,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470142867] [2021-12-06 19:24:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:30,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:30,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:30,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470142867] [2021-12-06 19:24:30,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470142867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:30,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:30,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:24:30,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765216617] [2021-12-06 19:24:30,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:30,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:24:30,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:30,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:24:30,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:30,882 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:24:33,771 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2021-12-06 19:24:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:24:33,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 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 122 [2021-12-06 19:24:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:24:33,786 INFO L225 Difference]: With dead ends: 5317 [2021-12-06 19:24:33,786 INFO L226 Difference]: Without dead ends: 3460 [2021-12-06 19:24:33,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:33,789 INFO L933 BasicCegarLoop]: 1039 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:24:33,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1192 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 19:24:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2021-12-06 19:24:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2021-12-06 19:24:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.3805668016194332) internal successors, (4774), 3458 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2021-12-06 19:24:33,848 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 122 [2021-12-06 19:24:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:24:33,848 INFO L470 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2021-12-06 19:24:33,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:33,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2021-12-06 19:24:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 19:24:33,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:24:33,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:24:33,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:24:33,851 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:24:33,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1015718372, now seen corresponding path program 1 times [2021-12-06 19:24:33,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:33,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936736890] [2021-12-06 19:24:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:33,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:33,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:33,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936736890] [2021-12-06 19:24:33,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936736890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:33,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:33,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:24:33,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070573143] [2021-12-06 19:24:33,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:33,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:24:33,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:33,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:24:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:24:33,968 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:24:37,849 INFO L93 Difference]: Finished difference Result 10870 states and 14768 transitions. [2021-12-06 19:24:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:24:37,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 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 136 [2021-12-06 19:24:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:24:37,875 INFO L225 Difference]: With dead ends: 10870 [2021-12-06 19:24:37,875 INFO L226 Difference]: Without dead ends: 7413 [2021-12-06 19:24:37,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:24:37,880 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 2579 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 4951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:24:37,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2579 Valid, 1003 Invalid, 4951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-06 19:24:37,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2021-12-06 19:24:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 7412. [2021-12-06 19:24:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 1.2698691134799622) internal successors, (9411), 7411 states have internal predecessors, (9411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 9411 transitions. [2021-12-06 19:24:37,995 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 9411 transitions. Word has length 136 [2021-12-06 19:24:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:24:37,995 INFO L470 AbstractCegarLoop]: Abstraction has 7412 states and 9411 transitions. [2021-12-06 19:24:37,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 9411 transitions. [2021-12-06 19:24:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-06 19:24:38,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:24:38,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:24:38,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:24:38,001 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:24:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:38,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1943123758, now seen corresponding path program 1 times [2021-12-06 19:24:38,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:38,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361109332] [2021-12-06 19:24:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:38,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 19:24:38,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:38,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361109332] [2021-12-06 19:24:38,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361109332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:38,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:38,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:24:38,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864654355] [2021-12-06 19:24:38,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:38,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:24:38,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:38,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:24:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:38,127 INFO L87 Difference]: Start difference. First operand 7412 states and 9411 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:24:40,942 INFO L93 Difference]: Finished difference Result 20355 states and 26251 transitions. [2021-12-06 19:24:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:24:40,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 217 [2021-12-06 19:24:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:24:40,990 INFO L225 Difference]: With dead ends: 20355 [2021-12-06 19:24:40,990 INFO L226 Difference]: Without dead ends: 13732 [2021-12-06 19:24:41,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:41,001 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 888 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:24:41,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 978 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 19:24:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13732 states. [2021-12-06 19:24:41,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13732 to 12937. [2021-12-06 19:24:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12937 states, 12936 states have (on average 1.215213358070501) internal successors, (15720), 12936 states have internal predecessors, (15720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12937 states to 12937 states and 15720 transitions. [2021-12-06 19:24:41,229 INFO L78 Accepts]: Start accepts. Automaton has 12937 states and 15720 transitions. Word has length 217 [2021-12-06 19:24:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:24:41,229 INFO L470 AbstractCegarLoop]: Abstraction has 12937 states and 15720 transitions. [2021-12-06 19:24:41,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 12937 states and 15720 transitions. [2021-12-06 19:24:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-06 19:24:41,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:24:41,233 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:24:41,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:24:41,233 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:24:41,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:41,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1785955714, now seen corresponding path program 1 times [2021-12-06 19:24:41,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:41,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318361928] [2021-12-06 19:24:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:41,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:41,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:41,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318361928] [2021-12-06 19:24:41,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318361928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:41,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:41,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:24:41,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387928040] [2021-12-06 19:24:41,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:41,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:24:41,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:41,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:24:41,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:41,325 INFO L87 Difference]: Start difference. First operand 12937 states and 15720 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:24:44,053 INFO L93 Difference]: Finished difference Result 31392 states and 39119 transitions. [2021-12-06 19:24:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:24:44,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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 249 [2021-12-06 19:24:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:24:44,082 INFO L225 Difference]: With dead ends: 31392 [2021-12-06 19:24:44,082 INFO L226 Difference]: Without dead ends: 19244 [2021-12-06 19:24:44,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:44,093 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 858 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:24:44,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 926 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 19:24:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2021-12-06 19:24:44,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 18447. [2021-12-06 19:24:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18447 states, 18446 states have (on average 1.2024287108316165) internal successors, (22180), 18446 states have internal predecessors, (22180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18447 states to 18447 states and 22180 transitions. [2021-12-06 19:24:44,308 INFO L78 Accepts]: Start accepts. Automaton has 18447 states and 22180 transitions. Word has length 249 [2021-12-06 19:24:44,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:24:44,309 INFO L470 AbstractCegarLoop]: Abstraction has 18447 states and 22180 transitions. [2021-12-06 19:24:44,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 18447 states and 22180 transitions. [2021-12-06 19:24:44,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-12-06 19:24:44,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:24:44,319 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:24:44,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:24:44,319 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:24:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:44,320 INFO L85 PathProgramCache]: Analyzing trace with hash 74956696, now seen corresponding path program 1 times [2021-12-06 19:24:44,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:44,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888997347] [2021-12-06 19:24:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:44,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-06 19:24:44,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:44,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888997347] [2021-12-06 19:24:44,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888997347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:44,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:44,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:24:44,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936080395] [2021-12-06 19:24:44,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:44,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:24:44,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:44,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:24:44,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:44,462 INFO L87 Difference]: Start difference. First operand 18447 states and 22180 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:47,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:24:47,375 INFO L93 Difference]: Finished difference Result 42412 states and 52037 transitions. [2021-12-06 19:24:47,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:24:47,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-12-06 19:24:47,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:24:47,411 INFO L225 Difference]: With dead ends: 42412 [2021-12-06 19:24:47,411 INFO L226 Difference]: Without dead ends: 24754 [2021-12-06 19:24:47,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:47,426 INFO L933 BasicCegarLoop]: 1796 mSDtfsCounter, 820 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:24:47,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 1947 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 19:24:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24754 states. [2021-12-06 19:24:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24754 to 23962. [2021-12-06 19:24:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23962 states, 23961 states have (on average 1.1787070656483452) internal successors, (28243), 23961 states have internal predecessors, (28243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23962 states to 23962 states and 28243 transitions. [2021-12-06 19:24:47,665 INFO L78 Accepts]: Start accepts. Automaton has 23962 states and 28243 transitions. Word has length 338 [2021-12-06 19:24:47,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:24:47,666 INFO L470 AbstractCegarLoop]: Abstraction has 23962 states and 28243 transitions. [2021-12-06 19:24:47,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:47,666 INFO L276 IsEmpty]: Start isEmpty. Operand 23962 states and 28243 transitions. [2021-12-06 19:24:47,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-06 19:24:47,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:24:47,673 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:24:47,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:24:47,673 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:24:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:47,673 INFO L85 PathProgramCache]: Analyzing trace with hash -95192770, now seen corresponding path program 1 times [2021-12-06 19:24:47,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:47,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986683785] [2021-12-06 19:24:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:47,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 19:24:47,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:47,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986683785] [2021-12-06 19:24:47,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986683785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:47,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:47,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:24:47,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399615123] [2021-12-06 19:24:47,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:47,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:24:47,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:24:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:24:47,820 INFO L87 Difference]: Start difference. First operand 23962 states and 28243 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:24:53,776 INFO L93 Difference]: Finished difference Result 89064 states and 105284 transitions. [2021-12-06 19:24:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:24:53,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 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 347 [2021-12-06 19:24:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:24:53,877 INFO L225 Difference]: With dead ends: 89064 [2021-12-06 19:24:53,877 INFO L226 Difference]: Without dead ends: 65891 [2021-12-06 19:24:53,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:24:53,893 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 1743 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 6025 mSolverCounterSat, 1214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 7239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1214 IncrementalHoareTripleChecker+Valid, 6025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:24:53,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1743 Valid, 638 Invalid, 7239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1214 Valid, 6025 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-06 19:24:53,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65891 states. [2021-12-06 19:24:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65891 to 64189. [2021-12-06 19:24:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64189 states, 64188 states have (on average 1.1559325730666168) internal successors, (74197), 64188 states have internal predecessors, (74197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64189 states to 64189 states and 74197 transitions. [2021-12-06 19:24:54,446 INFO L78 Accepts]: Start accepts. Automaton has 64189 states and 74197 transitions. Word has length 347 [2021-12-06 19:24:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:24:54,446 INFO L470 AbstractCegarLoop]: Abstraction has 64189 states and 74197 transitions. [2021-12-06 19:24:54,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 64189 states and 74197 transitions. [2021-12-06 19:24:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-06 19:24:54,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:24:54,451 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:24:54,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:24:54,451 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:24:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash 976872075, now seen corresponding path program 1 times [2021-12-06 19:24:54,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:54,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58638998] [2021-12-06 19:24:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:54,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-06 19:24:54,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:54,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58638998] [2021-12-06 19:24:54,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58638998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:54,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:54,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:24:54,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186051370] [2021-12-06 19:24:54,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:54,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:24:54,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:54,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:24:54,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:54,547 INFO L87 Difference]: Start difference. First operand 64189 states and 74197 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:24:57,652 INFO L93 Difference]: Finished difference Result 140990 states and 162392 transitions. [2021-12-06 19:24:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:24:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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 347 [2021-12-06 19:24:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:24:57,725 INFO L225 Difference]: With dead ends: 140990 [2021-12-06 19:24:57,726 INFO L226 Difference]: Without dead ends: 77590 [2021-12-06 19:24:57,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:24:57,759 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 728 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2704 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:24:57,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1198 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2704 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 19:24:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77590 states. [2021-12-06 19:24:58,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77590 to 76794. [2021-12-06 19:24:58,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76794 states, 76793 states have (on average 1.1395700128918) internal successors, (87511), 76793 states have internal predecessors, (87511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76794 states to 76794 states and 87511 transitions. [2021-12-06 19:24:58,477 INFO L78 Accepts]: Start accepts. Automaton has 76794 states and 87511 transitions. Word has length 347 [2021-12-06 19:24:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:24:58,478 INFO L470 AbstractCegarLoop]: Abstraction has 76794 states and 87511 transitions. [2021-12-06 19:24:58,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 76794 states and 87511 transitions. [2021-12-06 19:24:58,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-12-06 19:24:58,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:24:58,483 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:24:58,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:24:58,484 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:24:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash -813973343, now seen corresponding path program 1 times [2021-12-06 19:24:58,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:58,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118537233] [2021-12-06 19:24:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:58,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 264 proven. 113 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 19:24:58,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:58,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118537233] [2021-12-06 19:24:58,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118537233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:24:58,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454802388] [2021-12-06 19:24:58,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:58,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:24:58,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:24:58,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:24:58,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:24:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:58,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:24:58,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:24:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-06 19:24:59,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:24:59,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454802388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:59,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:24:59,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-06 19:24:59,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444881571] [2021-12-06 19:24:59,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:59,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:24:59,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:59,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:24:59,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:24:59,281 INFO L87 Difference]: Start difference. First operand 76794 states and 87511 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:02,104 INFO L93 Difference]: Finished difference Result 152797 states and 174227 transitions. [2021-12-06 19:25:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:25:02,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 376 [2021-12-06 19:25:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:02,186 INFO L225 Difference]: With dead ends: 152797 [2021-12-06 19:25:02,186 INFO L226 Difference]: Without dead ends: 76792 [2021-12-06 19:25:02,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:25:02,206 INFO L933 BasicCegarLoop]: 1362 mSDtfsCounter, 1122 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:02,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1122 Valid, 1443 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 19:25:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76792 states. [2021-12-06 19:25:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76792 to 76004. [2021-12-06 19:25:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76004 states, 76003 states have (on average 1.1082325697669828) internal successors, (84229), 76003 states have internal predecessors, (84229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76004 states to 76004 states and 84229 transitions. [2021-12-06 19:25:02,891 INFO L78 Accepts]: Start accepts. Automaton has 76004 states and 84229 transitions. Word has length 376 [2021-12-06 19:25:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:02,892 INFO L470 AbstractCegarLoop]: Abstraction has 76004 states and 84229 transitions. [2021-12-06 19:25:02,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 76004 states and 84229 transitions. [2021-12-06 19:25:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-12-06 19:25:02,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:02,898 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:02,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:25:03,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:25:03,100 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:03,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2094899295, now seen corresponding path program 1 times [2021-12-06 19:25:03,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:03,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040618060] [2021-12-06 19:25:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:03,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 520 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-06 19:25:03,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:03,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040618060] [2021-12-06 19:25:03,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040618060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:25:03,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:25:03,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:25:03,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120351677] [2021-12-06 19:25:03,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:25:03,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:25:03,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:25:03,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:25:03,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:03,247 INFO L87 Difference]: Start difference. First operand 76004 states and 84229 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:06,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:06,511 INFO L93 Difference]: Finished difference Result 170117 states and 190568 transitions. [2021-12-06 19:25:06,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:25:06,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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 406 [2021-12-06 19:25:06,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:06,602 INFO L225 Difference]: With dead ends: 170117 [2021-12-06 19:25:06,602 INFO L226 Difference]: Without dead ends: 94902 [2021-12-06 19:25:06,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:06,628 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 905 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:06,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 907 Invalid, 3359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 19:25:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94902 states. [2021-12-06 19:25:07,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94902 to 94884. [2021-12-06 19:25:07,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94884 states, 94883 states have (on average 1.114235426788782) internal successors, (105722), 94883 states have internal predecessors, (105722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94884 states to 94884 states and 105722 transitions. [2021-12-06 19:25:07,573 INFO L78 Accepts]: Start accepts. Automaton has 94884 states and 105722 transitions. Word has length 406 [2021-12-06 19:25:07,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:07,574 INFO L470 AbstractCegarLoop]: Abstraction has 94884 states and 105722 transitions. [2021-12-06 19:25:07,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 94884 states and 105722 transitions. [2021-12-06 19:25:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-12-06 19:25:07,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:07,581 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:07,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 19:25:07,581 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:07,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:07,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1357683298, now seen corresponding path program 1 times [2021-12-06 19:25:07,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:07,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166619576] [2021-12-06 19:25:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:07,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 304 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 19:25:07,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:07,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166619576] [2021-12-06 19:25:07,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166619576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:25:07,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791425281] [2021-12-06 19:25:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:07,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:25:07,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:25:07,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:25:07,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:25:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:07,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:25:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:25:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-06 19:25:08,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:25:08,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791425281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:25:08,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:25:08,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-06 19:25:08,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31747609] [2021-12-06 19:25:08,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:25:08,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:25:08,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:25:08,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:25:08,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:25:08,713 INFO L87 Difference]: Start difference. First operand 94884 states and 105722 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:11,493 INFO L93 Difference]: Finished difference Result 177965 states and 199224 transitions. [2021-12-06 19:25:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:25:11,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 2 states have internal predecessors, (269), 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 439 [2021-12-06 19:25:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:11,585 INFO L225 Difference]: With dead ends: 177965 [2021-12-06 19:25:11,585 INFO L226 Difference]: Without dead ends: 98045 [2021-12-06 19:25:11,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:25:11,621 INFO L933 BasicCegarLoop]: 1049 mSDtfsCounter, 643 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 2589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:11,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 1184 Invalid, 2589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2476 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 19:25:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98045 states. [2021-12-06 19:25:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98045 to 98036. [2021-12-06 19:25:12,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98036 states, 98035 states have (on average 1.1118886112102822) internal successors, (109004), 98035 states have internal predecessors, (109004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98036 states to 98036 states and 109004 transitions. [2021-12-06 19:25:12,499 INFO L78 Accepts]: Start accepts. Automaton has 98036 states and 109004 transitions. Word has length 439 [2021-12-06 19:25:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:12,499 INFO L470 AbstractCegarLoop]: Abstraction has 98036 states and 109004 transitions. [2021-12-06 19:25:12,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 98036 states and 109004 transitions. [2021-12-06 19:25:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-12-06 19:25:12,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:12,507 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:12,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:25:12,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:25:12,708 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:12,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1957989732, now seen corresponding path program 1 times [2021-12-06 19:25:12,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:12,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7525679] [2021-12-06 19:25:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:12,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-06 19:25:12,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:12,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7525679] [2021-12-06 19:25:12,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7525679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:25:12,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:25:12,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:25:12,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323312444] [2021-12-06 19:25:12,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:25:12,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:25:12,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:25:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:25:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:12,938 INFO L87 Difference]: Start difference. First operand 98036 states and 109004 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:16,180 INFO L93 Difference]: Finished difference Result 195292 states and 217235 transitions. [2021-12-06 19:25:16,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:25:16,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 444 [2021-12-06 19:25:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:16,279 INFO L225 Difference]: With dead ends: 195292 [2021-12-06 19:25:16,279 INFO L226 Difference]: Without dead ends: 98045 [2021-12-06 19:25:16,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:16,364 INFO L933 BasicCegarLoop]: 1740 mSDtfsCounter, 793 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:16,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 1891 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 19:25:16,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98045 states. [2021-12-06 19:25:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98045 to 96452. [2021-12-06 19:25:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96452 states, 96451 states have (on average 1.08021689769935) internal successors, (104188), 96451 states have internal predecessors, (104188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:17,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96452 states to 96452 states and 104188 transitions. [2021-12-06 19:25:17,190 INFO L78 Accepts]: Start accepts. Automaton has 96452 states and 104188 transitions. Word has length 444 [2021-12-06 19:25:17,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:17,191 INFO L470 AbstractCegarLoop]: Abstraction has 96452 states and 104188 transitions. [2021-12-06 19:25:17,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 96452 states and 104188 transitions. [2021-12-06 19:25:17,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-12-06 19:25:17,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:17,199 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:17,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 19:25:17,199 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash -706087610, now seen corresponding path program 1 times [2021-12-06 19:25:17,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:17,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653262139] [2021-12-06 19:25:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:17,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-06 19:25:17,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:17,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653262139] [2021-12-06 19:25:17,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653262139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:25:17,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:25:17,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:25:17,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293049926] [2021-12-06 19:25:17,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:25:17,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:25:17,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:25:17,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:25:17,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:25:17,346 INFO L87 Difference]: Start difference. First operand 96452 states and 104188 transitions. Second operand has 4 states, 4 states have (on average 90.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:23,274 INFO L93 Difference]: Finished difference Result 244108 states and 267239 transitions. [2021-12-06 19:25:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:25:23,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 3 states have internal predecessors, (360), 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 454 [2021-12-06 19:25:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:23,454 INFO L225 Difference]: With dead ends: 244108 [2021-12-06 19:25:23,455 INFO L226 Difference]: Without dead ends: 162620 [2021-12-06 19:25:23,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:25:23,508 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 1409 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 6064 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 6822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 6064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:23,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1409 Valid, 943 Invalid, 6822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 6064 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-06 19:25:23,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162620 states. [2021-12-06 19:25:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162620 to 162600. [2021-12-06 19:25:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162600 states, 162599 states have (on average 1.081427315051138) internal successors, (175839), 162599 states have internal predecessors, (175839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162600 states to 162600 states and 175839 transitions. [2021-12-06 19:25:25,156 INFO L78 Accepts]: Start accepts. Automaton has 162600 states and 175839 transitions. Word has length 454 [2021-12-06 19:25:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:25,156 INFO L470 AbstractCegarLoop]: Abstraction has 162600 states and 175839 transitions. [2021-12-06 19:25:25,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 162600 states and 175839 transitions. [2021-12-06 19:25:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-12-06 19:25:25,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:25,165 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:25,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 19:25:25,165 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:25,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1259338018, now seen corresponding path program 1 times [2021-12-06 19:25:25,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:25,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183340830] [2021-12-06 19:25:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:25,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 560 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-06 19:25:25,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:25,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183340830] [2021-12-06 19:25:25,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183340830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:25:25,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:25:25,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:25:25,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295087431] [2021-12-06 19:25:25,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:25:25,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:25:25,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:25:25,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:25:25,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:25,248 INFO L87 Difference]: Start difference. First operand 162600 states and 175839 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:28,470 INFO L93 Difference]: Finished difference Result 332256 states and 358829 transitions. [2021-12-06 19:25:28,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:25:28,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 465 [2021-12-06 19:25:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:28,776 INFO L225 Difference]: With dead ends: 332256 [2021-12-06 19:25:28,776 INFO L226 Difference]: Without dead ends: 165721 [2021-12-06 19:25:28,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:28,838 INFO L933 BasicCegarLoop]: 1495 mSDtfsCounter, 1023 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 2942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:28,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 1629 Invalid, 2942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 19:25:28,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165721 states. [2021-12-06 19:25:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165721 to 159416. [2021-12-06 19:25:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159416 states, 159415 states have (on average 1.052611109368629) internal successors, (167802), 159415 states have internal predecessors, (167802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:30,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159416 states to 159416 states and 167802 transitions. [2021-12-06 19:25:30,662 INFO L78 Accepts]: Start accepts. Automaton has 159416 states and 167802 transitions. Word has length 465 [2021-12-06 19:25:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:30,663 INFO L470 AbstractCegarLoop]: Abstraction has 159416 states and 167802 transitions. [2021-12-06 19:25:30,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 159416 states and 167802 transitions. [2021-12-06 19:25:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2021-12-06 19:25:30,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:30,675 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:30,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 19:25:30,676 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:30,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1829295758, now seen corresponding path program 1 times [2021-12-06 19:25:30,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:30,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769748587] [2021-12-06 19:25:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:30,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 563 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-06 19:25:30,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:30,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769748587] [2021-12-06 19:25:30,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769748587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:25:30,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:25:30,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:25:30,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297683223] [2021-12-06 19:25:30,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:25:30,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:25:30,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:25:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:25:30,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:30,809 INFO L87 Difference]: Start difference. First operand 159416 states and 167802 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:33,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:33,906 INFO L93 Difference]: Finished difference Result 319627 states and 336411 transitions. [2021-12-06 19:25:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:25:33,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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 550 [2021-12-06 19:25:33,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:34,199 INFO L225 Difference]: With dead ends: 319627 [2021-12-06 19:25:34,199 INFO L226 Difference]: Without dead ends: 161000 [2021-12-06 19:25:34,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:34,251 INFO L933 BasicCegarLoop]: 1351 mSDtfsCounter, 861 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 2959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:34,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1436 Invalid, 2959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 19:25:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161000 states. [2021-12-06 19:25:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161000 to 159414. [2021-12-06 19:25:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159414 states, 159413 states have (on average 1.04466386053835) internal successors, (166533), 159413 states have internal predecessors, (166533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159414 states to 159414 states and 166533 transitions. [2021-12-06 19:25:35,936 INFO L78 Accepts]: Start accepts. Automaton has 159414 states and 166533 transitions. Word has length 550 [2021-12-06 19:25:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:35,936 INFO L470 AbstractCegarLoop]: Abstraction has 159414 states and 166533 transitions. [2021-12-06 19:25:35,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 159414 states and 166533 transitions. [2021-12-06 19:25:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2021-12-06 19:25:35,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:35,950 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:35,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 19:25:35,950 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:35,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2118697568, now seen corresponding path program 1 times [2021-12-06 19:25:35,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:35,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463415794] [2021-12-06 19:25:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:35,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 825 proven. 75 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-06 19:25:36,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:36,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463415794] [2021-12-06 19:25:36,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463415794] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:25:36,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621718006] [2021-12-06 19:25:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:36,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:25:36,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:25:36,121 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:25:36,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:25:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:36,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:25:36,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:25:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 963 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 19:25:37,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:25:37,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621718006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:25:37,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:25:37,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-12-06 19:25:37,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450836155] [2021-12-06 19:25:37,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:25:37,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:25:37,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:25:37,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:25:37,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:25:37,130 INFO L87 Difference]: Start difference. First operand 159414 states and 166533 transitions. Second operand has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:40,572 INFO L93 Difference]: Finished difference Result 307022 states and 321225 transitions. [2021-12-06 19:25:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:25:40,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 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 572 [2021-12-06 19:25:40,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:40,744 INFO L225 Difference]: With dead ends: 307022 [2021-12-06 19:25:40,745 INFO L226 Difference]: Without dead ends: 161782 [2021-12-06 19:25:40,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:25:40,798 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 1636 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 3649 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1636 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 4040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 3649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:40,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1636 Valid, 884 Invalid, 4040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 3649 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 19:25:40,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161782 states. [2021-12-06 19:25:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161782 to 158619. [2021-12-06 19:25:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158619 states, 158618 states have (on average 1.0429459456051646) internal successors, (165430), 158618 states have internal predecessors, (165430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158619 states to 158619 states and 165430 transitions. [2021-12-06 19:25:42,504 INFO L78 Accepts]: Start accepts. Automaton has 158619 states and 165430 transitions. Word has length 572 [2021-12-06 19:25:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:42,505 INFO L470 AbstractCegarLoop]: Abstraction has 158619 states and 165430 transitions. [2021-12-06 19:25:42,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 158619 states and 165430 transitions. [2021-12-06 19:25:42,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2021-12-06 19:25:42,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:42,525 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:42,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:25:42,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 19:25:42,727 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:42,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash -236769980, now seen corresponding path program 1 times [2021-12-06 19:25:42,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:42,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595350280] [2021-12-06 19:25:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:42,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 619 proven. 0 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2021-12-06 19:25:43,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:43,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595350280] [2021-12-06 19:25:43,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595350280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:25:43,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:25:43,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:25:43,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762175445] [2021-12-06 19:25:43,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:25:43,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:25:43,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:25:43,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:25:43,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:43,107 INFO L87 Difference]: Start difference. First operand 158619 states and 165430 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:46,704 INFO L93 Difference]: Finished difference Result 352672 states and 368922 transitions. [2021-12-06 19:25:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:25:46,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 630 [2021-12-06 19:25:46,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:46,938 INFO L225 Difference]: With dead ends: 352672 [2021-12-06 19:25:46,938 INFO L226 Difference]: Without dead ends: 205070 [2021-12-06 19:25:46,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:46,998 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 937 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 3161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:46,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 805 Invalid, 3161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 19:25:47,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205070 states. [2021-12-06 19:25:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205070 to 172779. [2021-12-06 19:25:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172779 states, 172778 states have (on average 1.0397677945108752) internal successors, (179649), 172778 states have internal predecessors, (179649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:48,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172779 states to 172779 states and 179649 transitions. [2021-12-06 19:25:48,910 INFO L78 Accepts]: Start accepts. Automaton has 172779 states and 179649 transitions. Word has length 630 [2021-12-06 19:25:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:48,911 INFO L470 AbstractCegarLoop]: Abstraction has 172779 states and 179649 transitions. [2021-12-06 19:25:48,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 172779 states and 179649 transitions. [2021-12-06 19:25:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2021-12-06 19:25:48,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:48,928 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:48,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 19:25:48,928 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:48,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1614911030, now seen corresponding path program 1 times [2021-12-06 19:25:48,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:48,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775443823] [2021-12-06 19:25:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:48,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 715 proven. 0 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2021-12-06 19:25:49,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:49,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775443823] [2021-12-06 19:25:49,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775443823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:25:49,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:25:49,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:25:49,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066138321] [2021-12-06 19:25:49,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:25:49,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:25:49,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:25:49,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:25:49,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:49,094 INFO L87 Difference]: Start difference. First operand 172779 states and 179649 transitions. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:52,903 INFO L93 Difference]: Finished difference Result 381011 states and 397285 transitions. [2021-12-06 19:25:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:25:52,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 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 636 [2021-12-06 19:25:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:53,142 INFO L225 Difference]: With dead ends: 381011 [2021-12-06 19:25:53,142 INFO L226 Difference]: Without dead ends: 221619 [2021-12-06 19:25:53,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:53,202 INFO L933 BasicCegarLoop]: 552 mSDtfsCounter, 1022 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:53,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 633 Invalid, 3243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [843 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 19:25:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221619 states. [2021-12-06 19:25:55,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221619 to 221614. [2021-12-06 19:25:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221614 states, 221613 states have (on average 1.0389598083144942) internal successors, (230247), 221613 states have internal predecessors, (230247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221614 states to 221614 states and 230247 transitions. [2021-12-06 19:25:55,488 INFO L78 Accepts]: Start accepts. Automaton has 221614 states and 230247 transitions. Word has length 636 [2021-12-06 19:25:55,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:55,489 INFO L470 AbstractCegarLoop]: Abstraction has 221614 states and 230247 transitions. [2021-12-06 19:25:55,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 221614 states and 230247 transitions. [2021-12-06 19:25:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2021-12-06 19:25:55,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:55,500 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:55,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 19:25:55,500 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2131909932, now seen corresponding path program 1 times [2021-12-06 19:25:55,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:55,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415835244] [2021-12-06 19:25:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:55,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 852 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-12-06 19:25:55,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415835244] [2021-12-06 19:25:55,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415835244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:25:55,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:25:55,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:25:55,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926568275] [2021-12-06 19:25:55,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:25:55,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:25:55,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:25:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:25:55,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:55,652 INFO L87 Difference]: Start difference. First operand 221614 states and 230247 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:59,511 INFO L93 Difference]: Finished difference Result 462137 states and 480025 transitions. [2021-12-06 19:25:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:25:59,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 638 [2021-12-06 19:25:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:59,800 INFO L225 Difference]: With dead ends: 462137 [2021-12-06 19:25:59,800 INFO L226 Difference]: Without dead ends: 241312 [2021-12-06 19:25:59,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:25:59,901 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 737 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2529 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:59,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 1002 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2529 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 19:26:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241312 states. [2021-12-06 19:26:02,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241312 to 235784. [2021-12-06 19:26:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235784 states, 235783 states have (on average 1.0382639969802743) internal successors, (244805), 235783 states have internal predecessors, (244805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235784 states to 235784 states and 244805 transitions. [2021-12-06 19:26:02,315 INFO L78 Accepts]: Start accepts. Automaton has 235784 states and 244805 transitions. Word has length 638 [2021-12-06 19:26:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:26:02,315 INFO L470 AbstractCegarLoop]: Abstraction has 235784 states and 244805 transitions. [2021-12-06 19:26:02,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 235784 states and 244805 transitions. [2021-12-06 19:26:02,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2021-12-06 19:26:02,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:26:02,329 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:26:02,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 19:26:02,329 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:26:02,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:26:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1123768794, now seen corresponding path program 1 times [2021-12-06 19:26:02,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:26:02,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489801980] [2021-12-06 19:26:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:26:02,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:26:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:26:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 367 proven. 638 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-06 19:26:02,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:26:02,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489801980] [2021-12-06 19:26:02,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489801980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:26:02,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393111644] [2021-12-06 19:26:02,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:26:02,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:26:02,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:26:02,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:26:02,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:26:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:26:02,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:26:02,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:26:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 735 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-12-06 19:26:03,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:26:03,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393111644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:26:03,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:26:03,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-06 19:26:03,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821662470] [2021-12-06 19:26:03,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:26:03,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:26:03,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:26:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:26:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:26:03,473 INFO L87 Difference]: Start difference. First operand 235784 states and 244805 transitions. Second operand has 4 states, 4 states have (on average 91.25) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:26:10,933 INFO L93 Difference]: Finished difference Result 522881 states and 542760 transitions. [2021-12-06 19:26:10,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:26:10,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 3 states have internal predecessors, (365), 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 680 [2021-12-06 19:26:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:26:11,251 INFO L225 Difference]: With dead ends: 522881 [2021-12-06 19:26:11,252 INFO L226 Difference]: Without dead ends: 287886 [2021-12-06 19:26:11,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:26:11,337 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 1662 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 6096 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 6774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 6096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:26:11,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1662 Valid, 833 Invalid, 6774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 6096 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-12-06 19:26:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287886 states. [2021-12-06 19:26:13,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287886 to 276746. [2021-12-06 19:26:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276746 states, 276745 states have (on average 1.038194005311749) internal successors, (287315), 276745 states have internal predecessors, (287315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:14,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276746 states to 276746 states and 287315 transitions. [2021-12-06 19:26:14,224 INFO L78 Accepts]: Start accepts. Automaton has 276746 states and 287315 transitions. Word has length 680 [2021-12-06 19:26:14,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:26:14,225 INFO L470 AbstractCegarLoop]: Abstraction has 276746 states and 287315 transitions. [2021-12-06 19:26:14,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:14,225 INFO L276 IsEmpty]: Start isEmpty. Operand 276746 states and 287315 transitions. [2021-12-06 19:26:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2021-12-06 19:26:14,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:26:14,235 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:26:14,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:26:14,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:26:14,437 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:26:14,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:26:14,438 INFO L85 PathProgramCache]: Analyzing trace with hash 203312885, now seen corresponding path program 1 times [2021-12-06 19:26:14,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:26:14,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009365938] [2021-12-06 19:26:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:26:14,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:26:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:26:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 584 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-06 19:26:14,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:26:14,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009365938] [2021-12-06 19:26:14,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009365938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:26:14,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:26:14,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:26:14,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232301029] [2021-12-06 19:26:14,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:26:14,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:26:14,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:26:14,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:26:14,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:26:14,677 INFO L87 Difference]: Start difference. First operand 276746 states and 287315 transitions. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:26:18,054 INFO L93 Difference]: Finished difference Result 518795 states and 538922 transitions. [2021-12-06 19:26:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:26:18,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 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 754 [2021-12-06 19:26:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:26:18,339 INFO L225 Difference]: With dead ends: 518795 [2021-12-06 19:26:18,339 INFO L226 Difference]: Without dead ends: 256223 [2021-12-06 19:26:18,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:26:18,420 INFO L933 BasicCegarLoop]: 1362 mSDtfsCounter, 915 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:26:18,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [915 Valid, 1437 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 2255 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:26:18,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256223 states. [2021-12-06 19:26:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256223 to 255434. [2021-12-06 19:26:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255434 states, 255433 states have (on average 1.0352930122576174) internal successors, (264448), 255433 states have internal predecessors, (264448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255434 states to 255434 states and 264448 transitions. [2021-12-06 19:26:21,274 INFO L78 Accepts]: Start accepts. Automaton has 255434 states and 264448 transitions. Word has length 754 [2021-12-06 19:26:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:26:21,274 INFO L470 AbstractCegarLoop]: Abstraction has 255434 states and 264448 transitions. [2021-12-06 19:26:21,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 255434 states and 264448 transitions. [2021-12-06 19:26:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2021-12-06 19:26:21,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:26:21,287 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:26:21,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 19:26:21,287 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:26:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:26:21,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1575790421, now seen corresponding path program 1 times [2021-12-06 19:26:21,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:26:21,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125350648] [2021-12-06 19:26:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:26:21,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:26:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:26:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 546 proven. 228 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-06 19:26:21,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:26:21,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125350648] [2021-12-06 19:26:21,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125350648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:26:21,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863601853] [2021-12-06 19:26:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:26:21,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:26:21,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:26:21,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:26:21,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:26:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:26:21,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:26:21,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:26:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 546 proven. 228 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-06 19:26:23,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:26:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 822 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 19:26:24,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863601853] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 19:26:24,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:26:24,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 6 [2021-12-06 19:26:24,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658590835] [2021-12-06 19:26:24,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:26:24,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:26:24,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:26:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:26:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:26:24,223 INFO L87 Difference]: Start difference. First operand 255434 states and 264448 transitions. Second operand has 5 states, 5 states have (on average 147.0) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:26:30,614 INFO L93 Difference]: Finished difference Result 563677 states and 584738 transitions. [2021-12-06 19:26:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:26:30,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 147.0) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 834 [2021-12-06 19:26:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:26:30,966 INFO L225 Difference]: With dead ends: 563677 [2021-12-06 19:26:30,966 INFO L226 Difference]: Without dead ends: 322417 [2021-12-06 19:26:31,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1669 GetRequests, 1663 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:26:31,050 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 1685 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 4402 mSolverCounterSat, 1581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 5983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1581 IncrementalHoareTripleChecker+Valid, 4402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:26:31,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1685 Valid, 342 Invalid, 5983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1581 Valid, 4402 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-06 19:26:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322417 states. [2021-12-06 19:26:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322417 to 282205. [2021-12-06 19:26:33,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282205 states, 282204 states have (on average 1.0357967994783914) internal successors, (292306), 282204 states have internal predecessors, (292306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282205 states to 282205 states and 292306 transitions. [2021-12-06 19:26:34,421 INFO L78 Accepts]: Start accepts. Automaton has 282205 states and 292306 transitions. Word has length 834 [2021-12-06 19:26:34,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:26:34,422 INFO L470 AbstractCegarLoop]: Abstraction has 282205 states and 292306 transitions. [2021-12-06 19:26:34,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.0) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:34,422 INFO L276 IsEmpty]: Start isEmpty. Operand 282205 states and 292306 transitions. [2021-12-06 19:26:34,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1005 [2021-12-06 19:26:34,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:26:34,449 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:26:34,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:26:34,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:26:34,651 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:26:34,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:26:34,653 INFO L85 PathProgramCache]: Analyzing trace with hash 567220684, now seen corresponding path program 1 times [2021-12-06 19:26:34,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:26:34,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460227031] [2021-12-06 19:26:34,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:26:34,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:26:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:26:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 1043 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-06 19:26:34,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:26:34,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460227031] [2021-12-06 19:26:34,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460227031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:26:34,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:26:34,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:26:34,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887798455] [2021-12-06 19:26:34,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:26:34,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:26:34,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:26:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:26:34,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:26:34,951 INFO L87 Difference]: Start difference. First operand 282205 states and 292306 transitions. Second operand has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:26:38,615 INFO L93 Difference]: Finished difference Result 550256 states and 570233 transitions. [2021-12-06 19:26:38,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:26:38,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 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 1004 [2021-12-06 19:26:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:26:38,951 INFO L225 Difference]: With dead ends: 550256 [2021-12-06 19:26:38,951 INFO L226 Difference]: Without dead ends: 282225 [2021-12-06 19:26:39,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:26:39,193 INFO L933 BasicCegarLoop]: 1584 mSDtfsCounter, 544 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:26:39,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 1711 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 19:26:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282225 states. [2021-12-06 19:26:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282225 to 279057. [2021-12-06 19:26:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279057 states, 279056 states have (on average 1.0338856716931368) internal successors, (288512), 279056 states have internal predecessors, (288512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279057 states to 279057 states and 288512 transitions. [2021-12-06 19:26:41,966 INFO L78 Accepts]: Start accepts. Automaton has 279057 states and 288512 transitions. Word has length 1004 [2021-12-06 19:26:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:26:41,967 INFO L470 AbstractCegarLoop]: Abstraction has 279057 states and 288512 transitions. [2021-12-06 19:26:41,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 279057 states and 288512 transitions. [2021-12-06 19:26:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1074 [2021-12-06 19:26:42,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:26:42,157 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:26:42,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 19:26:42,157 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:26:42,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:26:42,158 INFO L85 PathProgramCache]: Analyzing trace with hash 459999864, now seen corresponding path program 1 times [2021-12-06 19:26:42,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:26:42,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418228427] [2021-12-06 19:26:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:26:42,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:26:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:26:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 258 proven. 710 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 19:26:42,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:26:42,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418228427] [2021-12-06 19:26:42,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418228427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:26:42,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267161792] [2021-12-06 19:26:42,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:26:42,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:26:42,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:26:42,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:26:42,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:26:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:26:42,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:26:42,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:26:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-12-06 19:26:43,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:26:43,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267161792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:26:43,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:26:43,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-12-06 19:26:43,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170802729] [2021-12-06 19:26:43,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:26:43,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:26:43,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:26:43,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:26:43,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:26:43,612 INFO L87 Difference]: Start difference. First operand 279057 states and 288512 transitions. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:26:48,045 INFO L93 Difference]: Finished difference Result 595956 states and 616360 transitions. [2021-12-06 19:26:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:26:48,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 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 1073 [2021-12-06 19:26:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:26:48,546 INFO L225 Difference]: With dead ends: 595956 [2021-12-06 19:26:48,546 INFO L226 Difference]: Without dead ends: 316114 [2021-12-06 19:26:48,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:26:48,627 INFO L933 BasicCegarLoop]: 1676 mSDtfsCounter, 802 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2788 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 2788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:26:48,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 1801 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 2788 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-06 19:26:48,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316114 states. [2021-12-06 19:26:51,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316114 to 316073. [2021-12-06 19:26:51,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316073 states, 316072 states have (on average 1.0327457035105925) internal successors, (326422), 316072 states have internal predecessors, (326422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316073 states to 316073 states and 326422 transitions. [2021-12-06 19:26:52,011 INFO L78 Accepts]: Start accepts. Automaton has 316073 states and 326422 transitions. Word has length 1073 [2021-12-06 19:26:52,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:26:52,012 INFO L470 AbstractCegarLoop]: Abstraction has 316073 states and 326422 transitions. [2021-12-06 19:26:52,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 316073 states and 326422 transitions. [2021-12-06 19:26:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1120 [2021-12-06 19:26:52,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:26:52,048 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:26:52,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 19:26:52,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:26:52,250 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:26:52,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:26:52,252 INFO L85 PathProgramCache]: Analyzing trace with hash -604520167, now seen corresponding path program 1 times [2021-12-06 19:26:52,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:26:52,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259213816] [2021-12-06 19:26:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:26:52,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:26:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:26:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 414 proven. 916 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-12-06 19:26:52,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:26:52,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259213816] [2021-12-06 19:26:52,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259213816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:26:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154572442] [2021-12-06 19:26:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:26:52,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:26:52,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:26:52,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:26:52,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:26:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:26:53,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:26:53,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:26:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 414 proven. 916 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-12-06 19:26:54,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:26:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 819 proven. 511 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-12-06 19:26:56,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154572442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:26:56,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:26:56,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-06 19:26:56,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194887727] [2021-12-06 19:26:56,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:26:56,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:26:56,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:26:56,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:26:56,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:26:56,064 INFO L87 Difference]: Start difference. First operand 316073 states and 326422 transitions. Second operand has 8 states, 8 states have (on average 216.625) internal successors, (1733), 7 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:27:07,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:07,924 INFO L93 Difference]: Finished difference Result 705499 states and 729305 transitions. [2021-12-06 19:27:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:27:07,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 216.625) internal successors, (1733), 7 states have internal predecessors, (1733), 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 1119 [2021-12-06 19:27:07,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:08,415 INFO L225 Difference]: With dead ends: 705499 [2021-12-06 19:27:08,416 INFO L226 Difference]: Without dead ends: 393363 [2021-12-06 19:27:08,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2240 GetRequests, 2232 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:27:08,521 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 7643 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 10671 mSolverCounterSat, 4118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7643 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 14789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4118 IncrementalHoareTripleChecker+Valid, 10671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:08,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7643 Valid, 828 Invalid, 14789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4118 Valid, 10671 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2021-12-06 19:27:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393363 states. [2021-12-06 19:27:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393363 to 360212. [2021-12-06 19:27:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360212 states, 360211 states have (on average 1.0310484688141117) internal successors, (371395), 360211 states have internal predecessors, (371395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:27:12,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360212 states to 360212 states and 371395 transitions. [2021-12-06 19:27:12,561 INFO L78 Accepts]: Start accepts. Automaton has 360212 states and 371395 transitions. Word has length 1119 [2021-12-06 19:27:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:12,561 INFO L470 AbstractCegarLoop]: Abstraction has 360212 states and 371395 transitions. [2021-12-06 19:27:12,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 216.625) internal successors, (1733), 7 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:27:12,562 INFO L276 IsEmpty]: Start isEmpty. Operand 360212 states and 371395 transitions. [2021-12-06 19:27:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1358 [2021-12-06 19:27:12,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:12,634 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:27:12,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:27:12,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:27:12,836 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:12,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1983857670, now seen corresponding path program 1 times [2021-12-06 19:27:12,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:12,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299939511] [2021-12-06 19:27:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:12,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 995 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 19:27:13,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:13,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299939511] [2021-12-06 19:27:13,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299939511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:13,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:13,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:27:13,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225161135] [2021-12-06 19:27:13,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:13,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:27:13,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:13,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:27:13,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:27:13,272 INFO L87 Difference]: Start difference. First operand 360212 states and 371395 transitions. Second operand has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:27:20,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:20,038 INFO L93 Difference]: Finished difference Result 830779 states and 856620 transitions. [2021-12-06 19:27:20,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:27:20,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 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 1357 [2021-12-06 19:27:20,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:20,579 INFO L225 Difference]: With dead ends: 830779 [2021-12-06 19:27:20,579 INFO L226 Difference]: Without dead ends: 470569 [2021-12-06 19:27:20,823 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 [2021-12-06 19:27:20,823 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 1619 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 5328 mSolverCounterSat, 762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 6090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 5328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:20,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1619 Valid, 588 Invalid, 6090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 5328 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-06 19:27:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470569 states. [2021-12-06 19:27:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470569 to 451554. [2021-12-06 19:27:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451554 states, 451553 states have (on average 1.03040174686028) internal successors, (465281), 451553 states have internal predecessors, (465281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:27:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451554 states to 451554 states and 465281 transitions. [2021-12-06 19:27:25,801 INFO L78 Accepts]: Start accepts. Automaton has 451554 states and 465281 transitions. Word has length 1357 [2021-12-06 19:27:25,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:25,802 INFO L470 AbstractCegarLoop]: Abstraction has 451554 states and 465281 transitions. [2021-12-06 19:27:25,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:27:25,802 INFO L276 IsEmpty]: Start isEmpty. Operand 451554 states and 465281 transitions. [2021-12-06 19:27:25,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1475 [2021-12-06 19:27:25,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:25,913 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:27:25,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 19:27:25,914 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:25,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:25,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1996703537, now seen corresponding path program 1 times [2021-12-06 19:27:25,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:25,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746420618] [2021-12-06 19:27:25,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:25,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 1000 proven. 223 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2021-12-06 19:27:26,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:26,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746420618] [2021-12-06 19:27:26,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746420618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:27:26,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803896624] [2021-12-06 19:27:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:26,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:27:26,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:27:26,566 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:27:26,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:27:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:26,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1713 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:27:26,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:27:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 1000 proven. 223 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2021-12-06 19:27:28,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:27:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 1000 proven. 223 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2021-12-06 19:27:30,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803896624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:27:30,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:27:30,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-12-06 19:27:30,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250128067] [2021-12-06 19:27:30,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:27:30,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:27:30,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:30,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:27:30,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:27:30,648 INFO L87 Difference]: Start difference. First operand 451554 states and 465281 transitions. Second operand has 7 states, 7 states have (on average 267.7142857142857) internal successors, (1874), 6 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:27:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:44,115 INFO L93 Difference]: Finished difference Result 946415 states and 975209 transitions. [2021-12-06 19:27:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:27:44,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 267.7142857142857) internal successors, (1874), 6 states have internal predecessors, (1874), 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 1474 [2021-12-06 19:27:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:44,731 INFO L225 Difference]: With dead ends: 946415 [2021-12-06 19:27:44,731 INFO L226 Difference]: Without dead ends: 512975 [2021-12-06 19:27:44,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2956 GetRequests, 2943 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:27:44,877 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 7353 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 17686 mSolverCounterSat, 1411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7353 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 19097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1411 IncrementalHoareTripleChecker+Valid, 17686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:44,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7353 Valid, 1121 Invalid, 19097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1411 Valid, 17686 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2021-12-06 19:27:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512975 states. [2021-12-06 19:27:49,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512975 to 427146. [2021-12-06 19:27:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427146 states, 427145 states have (on average 1.0287817954090532) internal successors, (439439), 427145 states have internal predecessors, (439439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:27:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427146 states to 427146 states and 439439 transitions. [2021-12-06 19:27:50,272 INFO L78 Accepts]: Start accepts. Automaton has 427146 states and 439439 transitions. Word has length 1474 [2021-12-06 19:27:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:50,272 INFO L470 AbstractCegarLoop]: Abstraction has 427146 states and 439439 transitions. [2021-12-06 19:27:50,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 267.7142857142857) internal successors, (1874), 6 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:27:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 427146 states and 439439 transitions. [2021-12-06 19:27:50,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1488 [2021-12-06 19:27:50,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:50,385 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:27:50,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 19:27:50,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 19:27:50,587 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:50,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash -624045533, now seen corresponding path program 1 times [2021-12-06 19:27:50,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:50,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66082083] [2021-12-06 19:27:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:50,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 1162 proven. 0 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-12-06 19:27:51,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:51,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66082083] [2021-12-06 19:27:51,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66082083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:51,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:51,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:27:51,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466591658] [2021-12-06 19:27:51,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:51,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:27:51,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:27:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:27:51,203 INFO L87 Difference]: Start difference. First operand 427146 states and 439439 transitions. Second operand has 4 states, 4 states have (on average 303.0) internal successors, (1212), 3 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:27:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:57,359 INFO L93 Difference]: Finished difference Result 865346 states and 890312 transitions. [2021-12-06 19:27:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:27:57,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 303.0) internal successors, (1212), 3 states have internal predecessors, (1212), 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 1487 [2021-12-06 19:27:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:57,892 INFO L225 Difference]: With dead ends: 865346 [2021-12-06 19:27:57,892 INFO L226 Difference]: Without dead ends: 462616 [2021-12-06 19:27:58,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:27:58,001 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 1293 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 5255 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 5678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 5255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:58,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1293 Valid, 840 Invalid, 5678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 5255 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-06 19:27:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462616 states. [2021-12-06 19:28:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462616 to 457853. [2021-12-06 19:28:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457853 states, 457852 states have (on average 1.027408420188183) internal successors, (470401), 457852 states have internal predecessors, (470401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457853 states to 457853 states and 470401 transitions. [2021-12-06 19:28:03,513 INFO L78 Accepts]: Start accepts. Automaton has 457853 states and 470401 transitions. Word has length 1487 [2021-12-06 19:28:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:28:03,514 INFO L470 AbstractCegarLoop]: Abstraction has 457853 states and 470401 transitions. [2021-12-06 19:28:03,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 303.0) internal successors, (1212), 3 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 457853 states and 470401 transitions. [2021-12-06 19:28:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1516 [2021-12-06 19:28:03,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:28:03,627 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:28:03,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 19:28:03,628 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:28:03,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:28:03,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1756484011, now seen corresponding path program 1 times [2021-12-06 19:28:03,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:28:03,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447322381] [2021-12-06 19:28:03,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:28:03,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:28:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:28:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1623 backedges. 966 proven. 0 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2021-12-06 19:28:04,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:28:04,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447322381] [2021-12-06 19:28:04,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447322381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:28:04,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:28:04,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:28:04,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518853665] [2021-12-06 19:28:04,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:28:04,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:28:04,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:28:04,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:28:04,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:28:04,154 INFO L87 Difference]: Start difference. First operand 457853 states and 470401 transitions. Second operand has 3 states, 3 states have (on average 366.3333333333333) internal successors, (1099), 3 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:28:08,807 INFO L93 Difference]: Finished difference Result 915705 states and 941160 transitions. [2021-12-06 19:28:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:28:08,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 366.3333333333333) internal successors, (1099), 3 states have internal predecessors, (1099), 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 1515 [2021-12-06 19:28:08,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:28:09,380 INFO L225 Difference]: With dead ends: 915705 [2021-12-06 19:28:09,381 INFO L226 Difference]: Without dead ends: 482268 [2021-12-06 19:28:09,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:28:09,505 INFO L933 BasicCegarLoop]: 1659 mSDtfsCounter, 79 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:28:09,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1777 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 19:28:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482268 states. [2021-12-06 19:28:14,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482268 to 471232. [2021-12-06 19:28:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471232 states, 471231 states have (on average 1.027419673153931) internal successors, (484152), 471231 states have internal predecessors, (484152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471232 states to 471232 states and 484152 transitions. [2021-12-06 19:28:14,857 INFO L78 Accepts]: Start accepts. Automaton has 471232 states and 484152 transitions. Word has length 1515 [2021-12-06 19:28:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:28:14,858 INFO L470 AbstractCegarLoop]: Abstraction has 471232 states and 484152 transitions. [2021-12-06 19:28:14,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 366.3333333333333) internal successors, (1099), 3 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 471232 states and 484152 transitions. [2021-12-06 19:28:15,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1564 [2021-12-06 19:28:15,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:28:15,210 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:28:15,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 19:28:15,210 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:28:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:28:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash -405115587, now seen corresponding path program 1 times [2021-12-06 19:28:15,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:28:15,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116461239] [2021-12-06 19:28:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:28:15,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:28:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:28:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 1051 trivial. 0 not checked. [2021-12-06 19:28:15,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:28:15,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116461239] [2021-12-06 19:28:15,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116461239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:28:15,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:28:15,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:28:15,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068426109] [2021-12-06 19:28:15,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:28:15,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:28:15,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:28:15,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:28:15,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:28:15,739 INFO L87 Difference]: Start difference. First operand 471232 states and 484152 transitions. Second operand has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:28:21,207 INFO L93 Difference]: Finished difference Result 958974 states and 985643 transitions. [2021-12-06 19:28:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:28:21,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 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 1563 [2021-12-06 19:28:21,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:28:21,842 INFO L225 Difference]: With dead ends: 958974 [2021-12-06 19:28:21,843 INFO L226 Difference]: Without dead ends: 511367 [2021-12-06 19:28:21,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:28:21,993 INFO L933 BasicCegarLoop]: 494 mSDtfsCounter, 904 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:28:21,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 589 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 19:28:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511367 states. [2021-12-06 19:28:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511367 to 493260. [2021-12-06 19:28:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493260 states, 493259 states have (on average 1.026691859651826) internal successors, (506425), 493259 states have internal predecessors, (506425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493260 states to 493260 states and 506425 transitions. [2021-12-06 19:28:27,697 INFO L78 Accepts]: Start accepts. Automaton has 493260 states and 506425 transitions. Word has length 1563 [2021-12-06 19:28:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:28:27,698 INFO L470 AbstractCegarLoop]: Abstraction has 493260 states and 506425 transitions. [2021-12-06 19:28:27,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand 493260 states and 506425 transitions. [2021-12-06 19:28:28,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1755 [2021-12-06 19:28:28,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:28:28,115 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:28:28,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 19:28:28,115 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:28:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:28:28,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1342250765, now seen corresponding path program 1 times [2021-12-06 19:28:28,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:28:28,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112015210] [2021-12-06 19:28:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:28:28,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:28:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:28:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5314 backedges. 1678 proven. 0 refuted. 0 times theorem prover too weak. 3636 trivial. 0 not checked. [2021-12-06 19:28:28,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:28:28,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112015210] [2021-12-06 19:28:28,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112015210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:28:28,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:28:28,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:28:28,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173709827] [2021-12-06 19:28:28,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:28:28,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:28:28,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:28:28,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:28:28,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:28:28,712 INFO L87 Difference]: Start difference. First operand 493260 states and 506425 transitions. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:28:33,309 INFO L93 Difference]: Finished difference Result 971551 states and 997552 transitions. [2021-12-06 19:28:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:28:33,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 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 1754 [2021-12-06 19:28:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:28:33,938 INFO L225 Difference]: With dead ends: 971551 [2021-12-06 19:28:33,938 INFO L226 Difference]: Without dead ends: 473565 [2021-12-06 19:28:34,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:28:34,113 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 671 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:28:34,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 1658 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 2321 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 19:28:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473565 states. [2021-12-06 19:28:38,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473565 to 452277. [2021-12-06 19:28:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452277 states, 452276 states have (on average 1.0231296818756688) internal successors, (462737), 452276 states have internal predecessors, (462737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452277 states to 452277 states and 462737 transitions. [2021-12-06 19:28:39,115 INFO L78 Accepts]: Start accepts. Automaton has 452277 states and 462737 transitions. Word has length 1754 [2021-12-06 19:28:39,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:28:39,117 INFO L470 AbstractCegarLoop]: Abstraction has 452277 states and 462737 transitions. [2021-12-06 19:28:39,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 452277 states and 462737 transitions. [2021-12-06 19:28:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1884 [2021-12-06 19:28:39,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:28:39,550 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:28:39,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 19:28:39,550 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:28:39,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:28:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash -217350020, now seen corresponding path program 1 times [2021-12-06 19:28:39,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:28:39,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269212369] [2021-12-06 19:28:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:28:39,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:28:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:28:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1541 proven. 1438 refuted. 0 times theorem prover too weak. 2534 trivial. 0 not checked. [2021-12-06 19:28:40,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:28:40,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269212369] [2021-12-06 19:28:40,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269212369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:28:40,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741953212] [2021-12-06 19:28:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:28:40,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:28:40,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:28:40,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:28:40,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:28:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:28:40,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:28:40,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:28:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1877 proven. 0 refuted. 0 times theorem prover too weak. 3636 trivial. 0 not checked. [2021-12-06 19:28:41,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:28:41,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741953212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:28:41,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:28:41,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-06 19:28:41,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478727970] [2021-12-06 19:28:41,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:28:41,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:28:41,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:28:41,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:28:41,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:28:41,895 INFO L87 Difference]: Start difference. First operand 452277 states and 462737 transitions. Second operand has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:28:46,542 INFO L93 Difference]: Finished difference Result 876980 states and 897515 transitions. [2021-12-06 19:28:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:28:46,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 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 1883 [2021-12-06 19:28:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:28:47,042 INFO L225 Difference]: With dead ends: 876980 [2021-12-06 19:28:47,042 INFO L226 Difference]: Without dead ends: 448332 [2021-12-06 19:28:47,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1889 GetRequests, 1883 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:28:47,164 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 484 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:28:47,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 1758 Invalid, 2492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 19:28:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448332 states. [2021-12-06 19:28:51,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448332 to 436514. [2021-12-06 19:28:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436514 states, 436513 states have (on average 1.021511386831549) internal successors, (445903), 436513 states have internal predecessors, (445903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436514 states to 436514 states and 445903 transitions. [2021-12-06 19:28:52,057 INFO L78 Accepts]: Start accepts. Automaton has 436514 states and 445903 transitions. Word has length 1883 [2021-12-06 19:28:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:28:52,058 INFO L470 AbstractCegarLoop]: Abstraction has 436514 states and 445903 transitions. [2021-12-06 19:28:52,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:28:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand 436514 states and 445903 transitions. [2021-12-06 19:28:52,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1989 [2021-12-06 19:28:52,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:28:52,283 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:28:52,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 19:28:52,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638e7535-1a26-422a-841e-e448781af223/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 19:28:52,485 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:28:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:28:52,487 INFO L85 PathProgramCache]: Analyzing trace with hash 407534189, now seen corresponding path program 1 times [2021-12-06 19:28:52,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:28:52,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719338665] [2021-12-06 19:28:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:28:52,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:28:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:28:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4124 backedges. 2402 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-12-06 19:28:53,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:28:53,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719338665] [2021-12-06 19:28:53,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719338665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:28:53,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:28:53,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:28:53,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450264863] [2021-12-06 19:28:53,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:28:53,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:28:53,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:28:53,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:28:53,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:28:53,410 INFO L87 Difference]: Start difference. First operand 436514 states and 445903 transitions. Second operand has 4 states, 4 states have (on average 310.5) internal successors, (1242), 4 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:29:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:00,984 INFO L93 Difference]: Finished difference Result 967604 states and 988535 transitions. [2021-12-06 19:29:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:29:00,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 310.5) internal successors, (1242), 4 states have internal predecessors, (1242), 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 1988 [2021-12-06 19:29:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:01,727 INFO L225 Difference]: With dead ends: 967604 [2021-12-06 19:29:01,727 INFO L226 Difference]: Without dead ends: 538962 [2021-12-06 19:29:01,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:29:01,841 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 1662 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 5704 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 6518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 5704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:01,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1662 Valid, 764 Invalid, 6518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 5704 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-06 19:29:02,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538962 states. [2021-12-06 19:29:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538962 to 507349. [2021-12-06 19:29:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507349 states, 507348 states have (on average 1.0198108596072124) internal successors, (517399), 507348 states have internal predecessors, (517399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:29:07,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507349 states to 507349 states and 517399 transitions. [2021-12-06 19:29:07,594 INFO L78 Accepts]: Start accepts. Automaton has 507349 states and 517399 transitions. Word has length 1988 [2021-12-06 19:29:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:07,595 INFO L470 AbstractCegarLoop]: Abstraction has 507349 states and 517399 transitions. [2021-12-06 19:29:07,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 310.5) internal successors, (1242), 4 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:29:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 507349 states and 517399 transitions. [2021-12-06 19:29:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2365 [2021-12-06 19:29:07,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:07,870 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:07,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 19:29:07,870 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1833194397, now seen corresponding path program 1 times [2021-12-06 19:29:07,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:07,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827579217] [2021-12-06 19:29:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:07,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3303 backedges. 2573 proven. 0 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2021-12-06 19:29:09,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:09,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827579217] [2021-12-06 19:29:09,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827579217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:29:09,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:29:09,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:29:09,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123000283] [2021-12-06 19:29:09,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:29:09,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:29:09,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:09,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:29:09,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:29:09,039 INFO L87 Difference]: Start difference. First operand 507349 states and 517399 transitions. Second operand has 3 states, 3 states have (on average 629.6666666666666) internal successors, (1889), 3 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:29:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:14,540 INFO L93 Difference]: Finished difference Result 1021023 states and 1041381 transitions. [2021-12-06 19:29:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:29:14,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 629.6666666666666) internal successors, (1889), 3 states have internal predecessors, (1889), 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 2364 [2021-12-06 19:29:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:15,150 INFO L225 Difference]: With dead ends: 1021023 [2021-12-06 19:29:15,151 INFO L226 Difference]: Without dead ends: 522328 [2021-12-06 19:29:15,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:29:15,310 INFO L933 BasicCegarLoop]: 1511 mSDtfsCounter, 86 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 2497 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 2497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:15,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1611 Invalid, 2903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 2497 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-06 19:29:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522328 states.