./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label28.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_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/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_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/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_3e848b74-6272-437a-989c-5fda99bc7744/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 4253e0451be735529167e5ed681d73045b3b91eb0fb6b7736298c9e50c884adf --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:00:19,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:00:19,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:00:19,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:00:19,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:00:19,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:00:19,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:00:19,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:00:19,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:00:19,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:00:19,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:00:19,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:00:19,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:00:19,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:00:19,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:00:19,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:00:19,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:00:19,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:00:19,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:00:19,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:00:19,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:00:19,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:00:19,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:00:19,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:00:19,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:00:19,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:00:19,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:00:19,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:00:19,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:00:19,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:00:19,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:00:19,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:00:19,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:00:19,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:00:19,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:00:19,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:00:19,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:00:19,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:00:19,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:00:19,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:00:19,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:00:19,492 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:00:19,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:00:19,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:00:19,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:00:19,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:00:19,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:00:19,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:00:19,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:00:19,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:00:19,519 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:00:19,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:00:19,520 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:00:19,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:00:19,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:00:19,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:00:19,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:00:19,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:00:19,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:00:19,521 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:00:19,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:00:19,526 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:00:19,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:00:19,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:00:19,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:00:19,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:00:19,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:00:19,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:00:19,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:00:19,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:00:19,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:00:19,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:00:19,529 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:00:19,529 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:00:19,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:00:19,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:00:19,529 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_3e848b74-6272-437a-989c-5fda99bc7744/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4253e0451be735529167e5ed681d73045b3b91eb0fb6b7736298c9e50c884adf [2021-12-06 21:00:19,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:00:19,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:00:19,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:00:19,717 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:00:19,718 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:00:19,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2021-12-06 21:00:19,760 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/data/c82bb1a2c/f0b713c5cc684a84bfd99bd667097735/FLAG14bc9d692 [2021-12-06 21:00:20,399 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:00:20,399 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2021-12-06 21:00:20,431 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/data/c82bb1a2c/f0b713c5cc684a84bfd99bd667097735/FLAG14bc9d692 [2021-12-06 21:00:20,815 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/data/c82bb1a2c/f0b713c5cc684a84bfd99bd667097735 [2021-12-06 21:00:20,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:00:20,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:00:20,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:00:20,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:00:20,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:00:20,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:00:20" (1/1) ... [2021-12-06 21:00:20,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ccafc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:20, skipping insertion in model container [2021-12-06 21:00:20,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:00:20" (1/1) ... [2021-12-06 21:00:20,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:00:21,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:00:21,210 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_3e848b74-6272-437a-989c-5fda99bc7744/sv-benchmarks/c/eca-rers2012/Problem19_label28.c[3379,3392] [2021-12-06 21:00:22,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:00:22,191 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:00:22,206 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_3e848b74-6272-437a-989c-5fda99bc7744/sv-benchmarks/c/eca-rers2012/Problem19_label28.c[3379,3392] [2021-12-06 21:00:22,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:00:22,980 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:00:22,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:22 WrapperNode [2021-12-06 21:00:22,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:00:22,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:00:22,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:00:22,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:00:22,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:22" (1/1) ... [2021-12-06 21:00:23,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:22" (1/1) ... [2021-12-06 21:00:23,577 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-06 21:00:23,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:00:23,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:00:23,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:00:23,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:00:23,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:22" (1/1) ... [2021-12-06 21:00:23,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:22" (1/1) ... [2021-12-06 21:00:23,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:22" (1/1) ... [2021-12-06 21:00:23,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:22" (1/1) ... [2021-12-06 21:00:23,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:22" (1/1) ... [2021-12-06 21:00:23,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:22" (1/1) ... [2021-12-06 21:00:24,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:22" (1/1) ... [2021-12-06 21:00:24,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:00:24,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:00:24,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:00:24,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:00:24,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:22" (1/1) ... [2021-12-06 21:00:24,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:00:24,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:00:24,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:00:24,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:00:24,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:00:24,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:00:24,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:00:24,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:00:24,206 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:00:24,207 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:00:29,625 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:00:29,656 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:00:29,656 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 21:00:29,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:00:29 BoogieIcfgContainer [2021-12-06 21:00:29,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:00:29,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:00:29,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:00:29,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:00:29,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:00:20" (1/3) ... [2021-12-06 21:00:29,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ffdf05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:00:29, skipping insertion in model container [2021-12-06 21:00:29,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:22" (2/3) ... [2021-12-06 21:00:29,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ffdf05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:00:29, skipping insertion in model container [2021-12-06 21:00:29,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:00:29" (3/3) ... [2021-12-06 21:00:29,669 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label28.c [2021-12-06 21:00:29,674 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:00:29,674 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:00:29,724 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:00:29,729 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 21:00:29,729 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:00:29,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 21:00:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 21:00:29,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:29,770 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] [2021-12-06 21:00:29,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:29,775 INFO L85 PathProgramCache]: Analyzing trace with hash -573341295, now seen corresponding path program 1 times [2021-12-06 21:00:29,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:29,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906723283] [2021-12-06 21:00:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:29,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:29,920 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 21:00:29,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:29,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906723283] [2021-12-06 21:00:29,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906723283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:29,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:29,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:00:29,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591355927] [2021-12-06 21:00:29,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:29,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:00:29,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:29,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:00:29,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:00:29,963 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 21:00:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:36,005 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2021-12-06 21:00:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:00:36,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-06 21:00:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:36,037 INFO L225 Difference]: With dead ends: 4957 [2021-12-06 21:00:36,037 INFO L226 Difference]: Without dead ends: 3129 [2021-12-06 21:00:36,045 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 21:00:36,048 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1603 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:36,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1603 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-06 21:00:36,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-12-06 21:00:36,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2021-12-06 21:00:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 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 21:00:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2021-12-06 21:00:36,183 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 23 [2021-12-06 21:00:36,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:36,184 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2021-12-06 21:00:36,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 21:00:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2021-12-06 21:00:36,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 21:00:36,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:36,188 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 21:00:36,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:00:36,188 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:36,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1128031860, now seen corresponding path program 1 times [2021-12-06 21:00:36,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:36,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618786533] [2021-12-06 21:00:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:36,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:36,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:36,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618786533] [2021-12-06 21:00:36,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618786533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:36,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:36,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:00:36,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477925625] [2021-12-06 21:00:36,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:36,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:36,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:36,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:36,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:36,368 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 21:00:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:44,907 INFO L93 Difference]: Finished difference Result 10359 states and 16187 transitions. [2021-12-06 21:00:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:44,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-06 21:00:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:44,935 INFO L225 Difference]: With dead ends: 10359 [2021-12-06 21:00:44,935 INFO L226 Difference]: Without dead ends: 7253 [2021-12-06 21:00:44,939 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 21:00:44,940 INFO L933 BasicCegarLoop]: 1024 mSDtfsCounter, 4321 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 9504 mSolverCounterSat, 1500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4321 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 11004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1500 IncrementalHoareTripleChecker+Valid, 9504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:44,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4321 Valid, 1292 Invalid, 11004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1500 Valid, 9504 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2021-12-06 21:00:44,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7253 states. [2021-12-06 21:00:45,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7253 to 7249. [2021-12-06 21:00:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 1.4503311258278146) internal successors, (10512), 7248 states have internal predecessors, (10512), 0 states have call successors, (0), 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 21:00:45,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 10512 transitions. [2021-12-06 21:00:45,054 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 10512 transitions. Word has length 90 [2021-12-06 21:00:45,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:45,054 INFO L470 AbstractCegarLoop]: Abstraction has 7249 states and 10512 transitions. [2021-12-06 21:00:45,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 21:00:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 10512 transitions. [2021-12-06 21:00:45,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-06 21:00:45,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:45,060 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:45,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:00:45,060 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:45,061 INFO L85 PathProgramCache]: Analyzing trace with hash -813571766, now seen corresponding path program 1 times [2021-12-06 21:00:45,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:45,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975997198] [2021-12-06 21:00:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:45,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 21:00:45,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:45,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975997198] [2021-12-06 21:00:45,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975997198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:45,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:45,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:00:45,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818369437] [2021-12-06 21:00:45,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:45,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:45,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:45,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:45,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:45,269 INFO L87 Difference]: Start difference. First operand 7249 states and 10512 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 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 21:00:53,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:53,832 INFO L93 Difference]: Finished difference Result 17269 states and 24867 transitions. [2021-12-06 21:00:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:53,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 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 297 [2021-12-06 21:00:53,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:53,872 INFO L225 Difference]: With dead ends: 17269 [2021-12-06 21:00:53,872 INFO L226 Difference]: Without dead ends: 11387 [2021-12-06 21:00:53,877 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 21:00:53,878 INFO L933 BasicCegarLoop]: 1803 mSDtfsCounter, 3755 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 9455 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 9886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 9455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:53,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3755 Valid, 2157 Invalid, 9886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 9455 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-12-06 21:00:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11387 states. [2021-12-06 21:00:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11387 to 11367. [2021-12-06 21:00:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3286116487770543) internal successors, (15101), 11366 states have internal predecessors, (15101), 0 states have call successors, (0), 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 21:00:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15101 transitions. [2021-12-06 21:00:54,075 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15101 transitions. Word has length 297 [2021-12-06 21:00:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:54,075 INFO L470 AbstractCegarLoop]: Abstraction has 11367 states and 15101 transitions. [2021-12-06 21:00:54,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 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 21:00:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15101 transitions. [2021-12-06 21:00:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-06 21:00:54,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:54,081 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:54,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:00:54,082 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:54,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1573993180, now seen corresponding path program 1 times [2021-12-06 21:00:54,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:54,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107779643] [2021-12-06 21:00:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:54,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:54,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:54,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107779643] [2021-12-06 21:00:54,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107779643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:54,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:54,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:00:54,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430988609] [2021-12-06 21:00:54,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:54,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:54,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:54,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:54,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:54,292 INFO L87 Difference]: Start difference. First operand 11367 states and 15101 transitions. Second operand has 4 states, 4 states have (on average 81.25) 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 21:01:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:00,487 INFO L93 Difference]: Finished difference Result 20033 states and 27483 transitions. [2021-12-06 21:01:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:01:00,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.25) 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 325 [2021-12-06 21:01:00,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:00,515 INFO L225 Difference]: With dead ends: 20033 [2021-12-06 21:01:00,515 INFO L226 Difference]: Without dead ends: 11367 [2021-12-06 21:01:00,522 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 21:01:00,523 INFO L933 BasicCegarLoop]: 1775 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7325 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 7333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:00,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 2117 Invalid, 7333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7325 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-06 21:01:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11367 states. [2021-12-06 21:01:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11367 to 11367. [2021-12-06 21:01:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3274678866795706) internal successors, (15088), 11366 states have internal predecessors, (15088), 0 states have call successors, (0), 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 21:01:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15088 transitions. [2021-12-06 21:01:00,670 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15088 transitions. Word has length 325 [2021-12-06 21:01:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:00,670 INFO L470 AbstractCegarLoop]: Abstraction has 11367 states and 15088 transitions. [2021-12-06 21:01:00,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) 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 21:01:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15088 transitions. [2021-12-06 21:01:00,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-12-06 21:01:00,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:00,677 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:00,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:01:00,677 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:00,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:00,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1714499808, now seen corresponding path program 1 times [2021-12-06 21:01:00,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:00,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162302070] [2021-12-06 21:01:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:00,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:01:00,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:00,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162302070] [2021-12-06 21:01:00,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162302070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:01:00,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150517663] [2021-12-06 21:01:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:00,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:01:00,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:01:00,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:01:00,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:01:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:01:01,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:01:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 21:01:01,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:01:01,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150517663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:01,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:01:01,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-06 21:01:01,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393037330] [2021-12-06 21:01:01,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:01,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:01:01,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:01,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:01:01,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:01:01,636 INFO L87 Difference]: Start difference. First operand 11367 states and 15088 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 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 21:01:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:06,906 INFO L93 Difference]: Finished difference Result 24133 states and 33157 transitions. [2021-12-06 21:01:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:01:06,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 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 510 [2021-12-06 21:01:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:06,927 INFO L225 Difference]: With dead ends: 24133 [2021-12-06 21:01:06,927 INFO L226 Difference]: Without dead ends: 15498 [2021-12-06 21:01:06,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 509 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 21:01:06,933 INFO L933 BasicCegarLoop]: 1207 mSDtfsCounter, 1058 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4576 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 5385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 4576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:06,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 1384 Invalid, 5385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 4576 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-06 21:01:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15498 states. [2021-12-06 21:01:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15498 to 15496. [2021-12-06 21:01:07,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15496 states, 15495 states have (on average 1.2933849628912553) internal successors, (20041), 15495 states have internal predecessors, (20041), 0 states have call successors, (0), 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 21:01:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15496 states to 15496 states and 20041 transitions. [2021-12-06 21:01:07,094 INFO L78 Accepts]: Start accepts. Automaton has 15496 states and 20041 transitions. Word has length 510 [2021-12-06 21:01:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:07,095 INFO L470 AbstractCegarLoop]: Abstraction has 15496 states and 20041 transitions. [2021-12-06 21:01:07,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 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 21:01:07,095 INFO L276 IsEmpty]: Start isEmpty. Operand 15496 states and 20041 transitions. [2021-12-06 21:01:07,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2021-12-06 21:01:07,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:07,106 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:07,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:01:07,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:01:07,308 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:07,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1054282805, now seen corresponding path program 1 times [2021-12-06 21:01:07,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:07,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678094315] [2021-12-06 21:01:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:07,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 63 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:01:07,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:07,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678094315] [2021-12-06 21:01:07,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678094315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:01:07,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53784466] [2021-12-06 21:01:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:07,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:01:07,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:01:07,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:01:07,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:01:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:07,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:01:07,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:01:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:01:08,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:01:08,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53784466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:08,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:01:08,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-06 21:01:08,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120629070] [2021-12-06 21:01:08,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:08,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:01:08,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:08,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:01:08,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:01:08,137 INFO L87 Difference]: Start difference. First operand 15496 states and 20041 transitions. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 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 21:01:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:13,339 INFO L93 Difference]: Finished difference Result 40540 states and 53991 transitions. [2021-12-06 21:01:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:01:13,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 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 579 [2021-12-06 21:01:13,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:13,370 INFO L225 Difference]: With dead ends: 40540 [2021-12-06 21:01:13,370 INFO L226 Difference]: Without dead ends: 27776 [2021-12-06 21:01:13,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:01:13,381 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 2531 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:13,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2531 Valid, 814 Invalid, 5525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1472 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-06 21:01:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27776 states. [2021-12-06 21:01:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27776 to 27772. [2021-12-06 21:01:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27772 states, 27771 states have (on average 1.2915271326203595) internal successors, (35867), 27771 states have internal predecessors, (35867), 0 states have call successors, (0), 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 21:01:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27772 states to 27772 states and 35867 transitions. [2021-12-06 21:01:13,664 INFO L78 Accepts]: Start accepts. Automaton has 27772 states and 35867 transitions. Word has length 579 [2021-12-06 21:01:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:13,665 INFO L470 AbstractCegarLoop]: Abstraction has 27772 states and 35867 transitions. [2021-12-06 21:01:13,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 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 21:01:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 27772 states and 35867 transitions. [2021-12-06 21:01:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2021-12-06 21:01:13,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:13,669 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:13,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:01:13,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:01:13,870 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:13,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1957660590, now seen corresponding path program 1 times [2021-12-06 21:01:13,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:13,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574876644] [2021-12-06 21:01:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:13,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 21:01:14,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:14,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574876644] [2021-12-06 21:01:14,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574876644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:14,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:01:14,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:01:14,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537388299] [2021-12-06 21:01:14,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:14,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:01:14,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:14,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:01:14,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:01:14,109 INFO L87 Difference]: Start difference. First operand 27772 states and 35867 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 0 states have call successors, (0), 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 21:01:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:18,993 INFO L93 Difference]: Finished difference Result 58285 states and 75896 transitions. [2021-12-06 21:01:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:01:18,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 0 states have call successors, (0), 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 584 [2021-12-06 21:01:18,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:19,021 INFO L225 Difference]: With dead ends: 58285 [2021-12-06 21:01:19,021 INFO L226 Difference]: Without dead ends: 33245 [2021-12-06 21:01:19,035 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 21:01:19,035 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 1383 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 1660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 5585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1660 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:19,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1383 Valid, 733 Invalid, 5585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1660 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-06 21:01:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33245 states. [2021-12-06 21:01:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33245 to 33235. [2021-12-06 21:01:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33235 states, 33234 states have (on average 1.228771739784558) internal successors, (40837), 33234 states have internal predecessors, (40837), 0 states have call successors, (0), 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 21:01:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33235 states to 33235 states and 40837 transitions. [2021-12-06 21:01:19,329 INFO L78 Accepts]: Start accepts. Automaton has 33235 states and 40837 transitions. Word has length 584 [2021-12-06 21:01:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:19,330 INFO L470 AbstractCegarLoop]: Abstraction has 33235 states and 40837 transitions. [2021-12-06 21:01:19,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 0 states have call successors, (0), 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 21:01:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 33235 states and 40837 transitions. [2021-12-06 21:01:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2021-12-06 21:01:19,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:19,334 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:19,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 21:01:19,334 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:19,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:19,335 INFO L85 PathProgramCache]: Analyzing trace with hash -601971848, now seen corresponding path program 1 times [2021-12-06 21:01:19,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:19,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990448932] [2021-12-06 21:01:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:19,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 21:01:19,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:19,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990448932] [2021-12-06 21:01:19,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990448932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:19,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:01:19,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:01:19,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272320360] [2021-12-06 21:01:19,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:19,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:01:19,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:19,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:01:19,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:01:19,513 INFO L87 Difference]: Start difference. First operand 33235 states and 40837 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 0 states have call successors, (0), 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 21:01:25,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:25,395 INFO L93 Difference]: Finished difference Result 91260 states and 113481 transitions. [2021-12-06 21:01:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:01:25,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 0 states have call successors, (0), 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 601 [2021-12-06 21:01:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:25,491 INFO L225 Difference]: With dead ends: 91260 [2021-12-06 21:01:25,491 INFO L226 Difference]: Without dead ends: 60757 [2021-12-06 21:01:25,502 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 21:01:25,503 INFO L933 BasicCegarLoop]: 1747 mSDtfsCounter, 1350 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 4280 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 5710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:25,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1350 Valid, 2013 Invalid, 5710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4280 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-06 21:01:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60757 states. [2021-12-06 21:01:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60757 to 55276. [2021-12-06 21:01:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55276 states, 55275 states have (on average 1.1672003618272275) internal successors, (64517), 55275 states have internal predecessors, (64517), 0 states have call successors, (0), 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 21:01:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55276 states to 55276 states and 64517 transitions. [2021-12-06 21:01:26,015 INFO L78 Accepts]: Start accepts. Automaton has 55276 states and 64517 transitions. Word has length 601 [2021-12-06 21:01:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:26,016 INFO L470 AbstractCegarLoop]: Abstraction has 55276 states and 64517 transitions. [2021-12-06 21:01:26,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 0 states have call successors, (0), 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 21:01:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 55276 states and 64517 transitions. [2021-12-06 21:01:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2021-12-06 21:01:26,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:26,022 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:26,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 21:01:26,022 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:26,023 INFO L85 PathProgramCache]: Analyzing trace with hash 22569828, now seen corresponding path program 1 times [2021-12-06 21:01:26,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:26,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826587290] [2021-12-06 21:01:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:26,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 41 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:01:26,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:26,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826587290] [2021-12-06 21:01:26,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826587290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:01:26,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504305806] [2021-12-06 21:01:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:26,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:01:26,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:01:26,542 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:01:26,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:01:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:26,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:01:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:01:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-06 21:01:27,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:01:27,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504305806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:27,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:01:27,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-06 21:01:27,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923995736] [2021-12-06 21:01:27,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:27,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:01:27,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:27,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:01:27,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:01:27,119 INFO L87 Difference]: Start difference. First operand 55276 states and 64517 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 21:01:31,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:31,725 INFO L93 Difference]: Finished difference Result 110553 states and 129119 transitions. [2021-12-06 21:01:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:01:31,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 717 [2021-12-06 21:01:31,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:31,780 INFO L225 Difference]: With dead ends: 110553 [2021-12-06 21:01:31,780 INFO L226 Difference]: Without dead ends: 58009 [2021-12-06 21:01:31,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:01:31,809 INFO L933 BasicCegarLoop]: 2903 mSDtfsCounter, 1583 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3678 mSolverCounterSat, 1466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 5144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 3678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:31,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1583 Valid, 3085 Invalid, 5144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1466 Valid, 3678 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-06 21:01:31,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58009 states. [2021-12-06 21:01:32,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58009 to 58003. [2021-12-06 21:01:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58003 states, 58002 states have (on average 1.116909761732354) internal successors, (64783), 58002 states have internal predecessors, (64783), 0 states have call successors, (0), 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 21:01:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58003 states to 58003 states and 64783 transitions. [2021-12-06 21:01:32,382 INFO L78 Accepts]: Start accepts. Automaton has 58003 states and 64783 transitions. Word has length 717 [2021-12-06 21:01:32,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:32,383 INFO L470 AbstractCegarLoop]: Abstraction has 58003 states and 64783 transitions. [2021-12-06 21:01:32,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 21:01:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 58003 states and 64783 transitions. [2021-12-06 21:01:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2021-12-06 21:01:32,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:32,388 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:32,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:01:32,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:01:32,590 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:32,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1861895486, now seen corresponding path program 1 times [2021-12-06 21:01:32,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:32,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366853119] [2021-12-06 21:01:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:32,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 41 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:01:33,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:33,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366853119] [2021-12-06 21:01:33,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366853119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:01:33,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109286344] [2021-12-06 21:01:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:33,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:01:33,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:01:33,054 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:01:33,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:01:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:33,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:01:33,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:01:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-06 21:01:33,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:01:33,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109286344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:33,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:01:33,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 21:01:33,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193881785] [2021-12-06 21:01:33,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:33,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:01:33,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:33,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:01:33,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:01:33,678 INFO L87 Difference]: Start difference. First operand 58003 states and 64783 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 21:01:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:39,659 INFO L93 Difference]: Finished difference Result 129686 states and 145981 transitions. [2021-12-06 21:01:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:01:39,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 729 [2021-12-06 21:01:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:39,733 INFO L225 Difference]: With dead ends: 129686 [2021-12-06 21:01:39,733 INFO L226 Difference]: Without dead ends: 74415 [2021-12-06 21:01:39,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:01:39,756 INFO L933 BasicCegarLoop]: 1314 mSDtfsCounter, 1582 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 4914 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 5637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 4914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:39,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1582 Valid, 1438 Invalid, 5637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 4914 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-06 21:01:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74415 states. [2021-12-06 21:01:40,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74415 to 70304. [2021-12-06 21:01:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70304 states, 70303 states have (on average 1.1228681564086882) internal successors, (78941), 70303 states have internal predecessors, (78941), 0 states have call successors, (0), 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 21:01:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70304 states to 70304 states and 78941 transitions. [2021-12-06 21:01:40,427 INFO L78 Accepts]: Start accepts. Automaton has 70304 states and 78941 transitions. Word has length 729 [2021-12-06 21:01:40,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:40,427 INFO L470 AbstractCegarLoop]: Abstraction has 70304 states and 78941 transitions. [2021-12-06 21:01:40,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 21:01:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 70304 states and 78941 transitions. [2021-12-06 21:01:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2021-12-06 21:01:40,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:40,435 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:01:40,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 21:01:40,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 21:01:40,637 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:40,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:40,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2144527646, now seen corresponding path program 1 times [2021-12-06 21:01:40,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:40,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903901663] [2021-12-06 21:01:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:40,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-06 21:01:40,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:40,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903901663] [2021-12-06 21:01:40,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903901663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:40,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:01:40,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:01:40,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178981109] [2021-12-06 21:01:40,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:40,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:01:40,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:40,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:01:40,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:01:40,957 INFO L87 Difference]: Start difference. First operand 70304 states and 78941 transitions. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 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 21:01:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:51,641 INFO L93 Difference]: Finished difference Result 226802 states and 258051 transitions. [2021-12-06 21:01:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:01:51,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 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 807 [2021-12-06 21:01:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:51,795 INFO L225 Difference]: With dead ends: 226802 [2021-12-06 21:01:51,795 INFO L226 Difference]: Without dead ends: 159230 [2021-12-06 21:01:51,823 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 21:01:51,824 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 3242 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 9189 mSolverCounterSat, 2640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3242 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 11829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2640 IncrementalHoareTripleChecker+Valid, 9189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:51,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3242 Valid, 1299 Invalid, 11829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2640 Valid, 9189 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2021-12-06 21:01:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159230 states. [2021-12-06 21:01:53,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159230 to 152298. [2021-12-06 21:01:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152298 states, 152297 states have (on average 1.1156555940038215) internal successors, (169911), 152297 states have internal predecessors, (169911), 0 states have call successors, (0), 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 21:01:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152298 states to 152298 states and 169911 transitions. [2021-12-06 21:01:53,419 INFO L78 Accepts]: Start accepts. Automaton has 152298 states and 169911 transitions. Word has length 807 [2021-12-06 21:01:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:53,420 INFO L470 AbstractCegarLoop]: Abstraction has 152298 states and 169911 transitions. [2021-12-06 21:01:53,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 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 21:01:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 152298 states and 169911 transitions. [2021-12-06 21:01:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2021-12-06 21:01:53,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:53,427 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:53,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 21:01:53,427 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:53,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:53,428 INFO L85 PathProgramCache]: Analyzing trace with hash -27186972, now seen corresponding path program 1 times [2021-12-06 21:01:53,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:53,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278352979] [2021-12-06 21:01:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:53,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 172 proven. 386 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-06 21:01:53,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:53,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278352979] [2021-12-06 21:01:53,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278352979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:01:53,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867081326] [2021-12-06 21:01:53,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:53,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:01:53,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:01:53,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:01:53,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:01:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:54,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:01:54,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:01:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2021-12-06 21:01:54,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:01:54,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867081326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:54,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:01:54,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 21:01:54,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506142322] [2021-12-06 21:01:54,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:54,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:01:54,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:54,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:01:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:01:54,546 INFO L87 Difference]: Start difference. First operand 152298 states and 169911 transitions. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 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 21:02:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:02:00,942 INFO L93 Difference]: Finished difference Result 407088 states and 456713 transitions. [2021-12-06 21:02:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:02:00,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 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 883 [2021-12-06 21:02:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:02:01,281 INFO L225 Difference]: With dead ends: 407088 [2021-12-06 21:02:01,282 INFO L226 Difference]: Without dead ends: 257522 [2021-12-06 21:02:01,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:02:01,323 INFO L933 BasicCegarLoop]: 1218 mSDtfsCounter, 1538 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4187 mSolverCounterSat, 1842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1538 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 6029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1842 IncrementalHoareTripleChecker+Valid, 4187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:02:01,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1538 Valid, 1344 Invalid, 6029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1842 Valid, 4187 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-06 21:02:01,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257522 states. [2021-12-06 21:02:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257522 to 251945. [2021-12-06 21:02:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251945 states, 251944 states have (on average 1.105749690407392) internal successors, (278587), 251944 states have internal predecessors, (278587), 0 states have call successors, (0), 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 21:02:04,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251945 states to 251945 states and 278587 transitions. [2021-12-06 21:02:04,014 INFO L78 Accepts]: Start accepts. Automaton has 251945 states and 278587 transitions. Word has length 883 [2021-12-06 21:02:04,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:02:04,014 INFO L470 AbstractCegarLoop]: Abstraction has 251945 states and 278587 transitions. [2021-12-06 21:02:04,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 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 21:02:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 251945 states and 278587 transitions. [2021-12-06 21:02:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2021-12-06 21:02:04,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:02:04,025 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:04,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:02:04,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 21:02:04,228 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:02:04,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:02:04,230 INFO L85 PathProgramCache]: Analyzing trace with hash 250037035, now seen corresponding path program 1 times [2021-12-06 21:02:04,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:02:04,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838195559] [2021-12-06 21:02:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:02:04,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:02:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:02:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 508 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-12-06 21:02:04,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:02:04,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838195559] [2021-12-06 21:02:04,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838195559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:02:04,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:02:04,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:02:04,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302898883] [2021-12-06 21:02:04,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:02:04,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:02:04,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:02:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:02:04,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:02:04,642 INFO L87 Difference]: Start difference. First operand 251945 states and 278587 transitions. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 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 21:02:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:02:10,868 INFO L93 Difference]: Finished difference Result 501156 states and 554245 transitions. [2021-12-06 21:02:10,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:02:10,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 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 1006 [2021-12-06 21:02:10,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:02:11,145 INFO L225 Difference]: With dead ends: 501156 [2021-12-06 21:02:11,145 INFO L226 Difference]: Without dead ends: 243751 [2021-12-06 21:02:11,335 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 21:02:11,336 INFO L933 BasicCegarLoop]: 2877 mSDtfsCounter, 1357 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4320 mSolverCounterSat, 712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 3058 SdHoareTripleChecker+Invalid, 5032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 4320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:02:11,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 3058 Invalid, 5032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [712 Valid, 4320 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-06 21:02:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243751 states. [2021-12-06 21:02:13,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243751 to 242365. [2021-12-06 21:02:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242365 states, 242364 states have (on average 1.0844143519664637) internal successors, (262823), 242364 states have internal predecessors, (262823), 0 states have call successors, (0), 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 21:02:14,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242365 states to 242365 states and 262823 transitions. [2021-12-06 21:02:14,001 INFO L78 Accepts]: Start accepts. Automaton has 242365 states and 262823 transitions. Word has length 1006 [2021-12-06 21:02:14,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:02:14,002 INFO L470 AbstractCegarLoop]: Abstraction has 242365 states and 262823 transitions. [2021-12-06 21:02:14,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 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 21:02:14,002 INFO L276 IsEmpty]: Start isEmpty. Operand 242365 states and 262823 transitions. [2021-12-06 21:02:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1019 [2021-12-06 21:02:14,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:02:14,012 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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] [2021-12-06 21:02:14,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 21:02:14,012 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:02:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:02:14,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1583601661, now seen corresponding path program 1 times [2021-12-06 21:02:14,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:02:14,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960944748] [2021-12-06 21:02:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:02:14,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:02:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:02:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 580 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-06 21:02:14,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:02:14,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960944748] [2021-12-06 21:02:14,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960944748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:02:14,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:02:14,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:02:14,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790306717] [2021-12-06 21:02:14,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:02:14,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:02:14,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:02:14,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:02:14,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:02:14,308 INFO L87 Difference]: Start difference. First operand 242365 states and 262823 transitions. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 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 21:02:21,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:02:21,472 INFO L93 Difference]: Finished difference Result 578959 states and 631806 transitions. [2021-12-06 21:02:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:02:21,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 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 1018 [2021-12-06 21:02:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:02:21,848 INFO L225 Difference]: With dead ends: 578959 [2021-12-06 21:02:21,848 INFO L226 Difference]: Without dead ends: 339326 [2021-12-06 21:02:22,098 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 21:02:22,099 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 1664 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 4397 mSolverCounterSat, 1570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 5967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1570 IncrementalHoareTripleChecker+Valid, 4397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:02:22,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1664 Valid, 1080 Invalid, 5967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1570 Valid, 4397 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-12-06 21:02:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339326 states. [2021-12-06 21:02:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339326 to 339320. [2021-12-06 21:02:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339320 states, 339319 states have (on average 1.0845605462706185) internal successors, (368012), 339319 states have internal predecessors, (368012), 0 states have call successors, (0), 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 21:02:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339320 states to 339320 states and 368012 transitions. [2021-12-06 21:02:25,691 INFO L78 Accepts]: Start accepts. Automaton has 339320 states and 368012 transitions. Word has length 1018 [2021-12-06 21:02:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:02:25,692 INFO L470 AbstractCegarLoop]: Abstraction has 339320 states and 368012 transitions. [2021-12-06 21:02:25,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 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 21:02:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 339320 states and 368012 transitions. [2021-12-06 21:02:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1069 [2021-12-06 21:02:25,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:02:25,705 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:02:25,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 21:02:25,705 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:02:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:02:25,705 INFO L85 PathProgramCache]: Analyzing trace with hash -386127581, now seen corresponding path program 1 times [2021-12-06 21:02:25,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:02:25,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268518484] [2021-12-06 21:02:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:02:25,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:02:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:02:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 867 proven. 66 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-12-06 21:02:26,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:02:26,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268518484] [2021-12-06 21:02:26,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268518484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:02:26,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925748325] [2021-12-06 21:02:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:02:26,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:02:26,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:02:26,167 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:02:26,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:02:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:02:26,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:02:26,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:02:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 1202 trivial. 0 not checked. [2021-12-06 21:02:27,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:02:27,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925748325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:02:27,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:02:27,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 21:02:27,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224145846] [2021-12-06 21:02:27,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:02:27,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:02:27,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:02:27,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:02:27,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:02:27,095 INFO L87 Difference]: Start difference. First operand 339320 states and 368012 transitions. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 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 21:02:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:02:35,143 INFO L93 Difference]: Finished difference Result 763373 states and 830581 transitions. [2021-12-06 21:02:35,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:02:35,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 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 1068 [2021-12-06 21:02:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:02:35,658 INFO L225 Difference]: With dead ends: 763373 [2021-12-06 21:02:35,658 INFO L226 Difference]: Without dead ends: 425420 [2021-12-06 21:02:35,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 1068 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 21:02:35,863 INFO L933 BasicCegarLoop]: 1054 mSDtfsCounter, 1653 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4270 mSolverCounterSat, 1869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 6139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1869 IncrementalHoareTripleChecker+Valid, 4270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:02:35,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1653 Valid, 1136 Invalid, 6139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1869 Valid, 4270 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-12-06 21:02:36,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425420 states. [2021-12-06 21:02:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425420 to 406204. [2021-12-06 21:02:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406204 states, 406203 states have (on average 1.0885985578639252) internal successors, (442192), 406203 states have internal predecessors, (442192), 0 states have call successors, (0), 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 21:02:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406204 states to 406204 states and 442192 transitions. [2021-12-06 21:02:40,404 INFO L78 Accepts]: Start accepts. Automaton has 406204 states and 442192 transitions. Word has length 1068 [2021-12-06 21:02:40,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:02:40,405 INFO L470 AbstractCegarLoop]: Abstraction has 406204 states and 442192 transitions. [2021-12-06 21:02:40,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 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 21:02:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 406204 states and 442192 transitions. [2021-12-06 21:02:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1129 [2021-12-06 21:02:40,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:02:40,423 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:02:40,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 21:02:40,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 21:02:40,626 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:02:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:02:40,627 INFO L85 PathProgramCache]: Analyzing trace with hash -3594668, now seen corresponding path program 1 times [2021-12-06 21:02:40,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:02:40,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189259767] [2021-12-06 21:02:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:02:40,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:02:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:02:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 972 proven. 485 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-06 21:02:41,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:02:41,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189259767] [2021-12-06 21:02:41,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189259767] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:02:41,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155873628] [2021-12-06 21:02:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:02:41,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:02:41,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:02:41,236 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:02:41,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 21:02:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:02:41,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:02:41,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:02:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2021-12-06 21:02:42,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:02:42,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155873628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:02:42,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:02:42,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-06 21:02:42,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273324864] [2021-12-06 21:02:42,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:02:42,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:02:42,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:02:42,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:02:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:02:42,119 INFO L87 Difference]: Start difference. First operand 406204 states and 442192 transitions. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 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 21:02:50,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:02:50,792 INFO L93 Difference]: Finished difference Result 858833 states and 938516 transitions. [2021-12-06 21:02:50,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:02:50,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 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 1128 [2021-12-06 21:02:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:02:51,360 INFO L225 Difference]: With dead ends: 858833 [2021-12-06 21:02:51,360 INFO L226 Difference]: Without dead ends: 453996 [2021-12-06 21:02:51,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1133 GetRequests, 1129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:02:51,465 INFO L933 BasicCegarLoop]: 2933 mSDtfsCounter, 1419 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 4744 mSolverCounterSat, 1041 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1419 SdHoareTripleChecker+Valid, 3129 SdHoareTripleChecker+Invalid, 5785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1041 IncrementalHoareTripleChecker+Valid, 4744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:02:51,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1419 Valid, 3129 Invalid, 5785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1041 Valid, 4744 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-12-06 21:02:51,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453996 states. [2021-12-06 21:02:55,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453996 to 448509. [2021-12-06 21:02:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448509 states, 448508 states have (on average 1.0817242947728916) internal successors, (485162), 448508 states have internal predecessors, (485162), 0 states have call successors, (0), 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 21:02:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448509 states to 448509 states and 485162 transitions. [2021-12-06 21:02:56,340 INFO L78 Accepts]: Start accepts. Automaton has 448509 states and 485162 transitions. Word has length 1128 [2021-12-06 21:02:56,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:02:56,341 INFO L470 AbstractCegarLoop]: Abstraction has 448509 states and 485162 transitions. [2021-12-06 21:02:56,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 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 21:02:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 448509 states and 485162 transitions. [2021-12-06 21:02:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1219 [2021-12-06 21:02:56,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:02:56,514 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:02:56,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 21:02:56,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:02:56,717 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:02:56,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:02:56,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1338212785, now seen corresponding path program 1 times [2021-12-06 21:02:56,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:02:56,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399714836] [2021-12-06 21:02:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:02:56,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:02:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:02:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 42 proven. 485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:02:57,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:02:57,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399714836] [2021-12-06 21:02:57,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399714836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:02:57,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810343707] [2021-12-06 21:02:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:02:57,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:02:57,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:02:57,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:02:57,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 21:02:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:02:57,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 1350 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:02:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:02:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-12-06 21:02:58,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:02:58,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810343707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:02:58,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:02:58,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 21:02:58,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132501975] [2021-12-06 21:02:58,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:02:58,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:02:58,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:02:58,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:02:58,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:02:58,761 INFO L87 Difference]: Start difference. First operand 448509 states and 485162 transitions. Second operand has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 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 21:03:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:00,072 INFO L93 Difference]: Finished difference Result 545551 states and 590802 transitions. [2021-12-06 21:03:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:00,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 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 1218 [2021-12-06 21:03:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:00,800 INFO L225 Difference]: With dead ends: 545551 [2021-12-06 21:03:00,800 INFO L226 Difference]: Without dead ends: 545549 [2021-12-06 21:03:00,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1223 GetRequests, 1217 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:03:00,835 INFO L933 BasicCegarLoop]: 3079 mSDtfsCounter, 1606 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1606 SdHoareTripleChecker+Valid, 3331 SdHoareTripleChecker+Invalid, 6107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6107 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:00,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1606 Valid, 3331 Invalid, 6107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 6107 Unchecked, 0.0s Time] [2021-12-06 21:03:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545549 states. [2021-12-06 21:03:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545549 to 545483. [2021-12-06 21:03:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545483 states, 545482 states have (on average 1.0829009939833028) internal successors, (590703), 545482 states have internal predecessors, (590703), 0 states have call successors, (0), 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 21:03:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545483 states to 545483 states and 590703 transitions. [2021-12-06 21:03:07,037 INFO L78 Accepts]: Start accepts. Automaton has 545483 states and 590703 transitions. Word has length 1218 [2021-12-06 21:03:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:07,038 INFO L470 AbstractCegarLoop]: Abstraction has 545483 states and 590703 transitions. [2021-12-06 21:03:07,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 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 21:03:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 545483 states and 590703 transitions. [2021-12-06 21:03:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1242 [2021-12-06 21:03:07,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:07,058 INFO L514 BasicCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:07,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 21:03:07,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 21:03:07,261 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:07,263 INFO L85 PathProgramCache]: Analyzing trace with hash 172656683, now seen corresponding path program 1 times [2021-12-06 21:03:07,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:07,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098381875] [2021-12-06 21:03:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:07,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 1407 proven. 66 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-12-06 21:03:07,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:07,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098381875] [2021-12-06 21:03:07,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098381875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:03:07,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778939429] [2021-12-06 21:03:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:07,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:03:07,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:03:07,804 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:03:07,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 21:03:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:08,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:03:08,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:03:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 1218 proven. 0 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2021-12-06 21:03:08,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:03:08,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778939429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:08,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:03:08,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 21:03:08,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644739916] [2021-12-06 21:03:08,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:08,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:03:08,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:08,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:03:08,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:03:08,892 INFO L87 Difference]: Start difference. First operand 545483 states and 590703 transitions. Second operand has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 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 21:03:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:17,885 INFO L93 Difference]: Finished difference Result 1170220 states and 1269019 transitions. [2021-12-06 21:03:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:17,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 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 1241 [2021-12-06 21:03:17,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:18,731 INFO L225 Difference]: With dead ends: 1170220 [2021-12-06 21:03:18,731 INFO L226 Difference]: Without dead ends: 627469 [2021-12-06 21:03:18,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1244 GetRequests, 1241 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:03:18,923 INFO L933 BasicCegarLoop]: 2898 mSDtfsCounter, 1372 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 4849 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 5835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 4849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:18,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1372 Valid, 3066 Invalid, 5835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 4849 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-12-06 21:03:19,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627469 states. [2021-12-06 21:03:24,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627469 to 561832. [2021-12-06 21:03:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561832 states, 561831 states have (on average 1.0771584337638898) internal successors, (605181), 561831 states have internal predecessors, (605181), 0 states have call successors, (0), 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 21:03:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561832 states to 561832 states and 605181 transitions. [2021-12-06 21:03:25,476 INFO L78 Accepts]: Start accepts. Automaton has 561832 states and 605181 transitions. Word has length 1241 [2021-12-06 21:03:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:25,477 INFO L470 AbstractCegarLoop]: Abstraction has 561832 states and 605181 transitions. [2021-12-06 21:03:25,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 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 21:03:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 561832 states and 605181 transitions. [2021-12-06 21:03:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1280 [2021-12-06 21:03:25,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:25,493 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:25,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 21:03:25,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 21:03:25,695 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:25,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:25,697 INFO L85 PathProgramCache]: Analyzing trace with hash 276515601, now seen corresponding path program 1 times [2021-12-06 21:03:25,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:25,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295991729] [2021-12-06 21:03:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:25,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 1158 proven. 66 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-12-06 21:03:26,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:26,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295991729] [2021-12-06 21:03:26,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295991729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:03:26,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657613932] [2021-12-06 21:03:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:26,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:03:26,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:03:26,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:03:26,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 21:03:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:26,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:03:26,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:03:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 1180 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2021-12-06 21:03:27,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:03:27,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657613932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:27,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:03:27,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 21:03:27,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271819332] [2021-12-06 21:03:27,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:27,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:03:27,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:27,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:03:27,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:03:27,478 INFO L87 Difference]: Start difference. First operand 561832 states and 605181 transitions. Second operand has 3 states, 3 states have (on average 319.3333333333333) internal successors, (958), 3 states have internal predecessors, (958), 0 states have call successors, (0), 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 21:03:34,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:34,475 INFO L93 Difference]: Finished difference Result 1140043 states and 1227796 transitions. [2021-12-06 21:03:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:34,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 319.3333333333333) internal successors, (958), 3 states have internal predecessors, (958), 0 states have call successors, (0), 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 1279 [2021-12-06 21:03:34,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:35,187 INFO L225 Difference]: With dead ends: 1140043 [2021-12-06 21:03:35,187 INFO L226 Difference]: Without dead ends: 580943 [2021-12-06 21:03:35,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1282 GetRequests, 1279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:03:35,558 INFO L933 BasicCegarLoop]: 2993 mSDtfsCounter, 1280 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 3731 mSolverCounterSat, 713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 3161 SdHoareTripleChecker+Invalid, 4444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 3731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:35,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 3161 Invalid, 4444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [713 Valid, 3731 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-06 21:03:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580943 states. [2021-12-06 21:03:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580943 to 578197. [2021-12-06 21:03:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578197 states, 578196 states have (on average 1.0755332101916997) internal successors, (621869), 578196 states have internal predecessors, (621869), 0 states have call successors, (0), 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 21:03:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578197 states to 578197 states and 621869 transitions. [2021-12-06 21:03:42,046 INFO L78 Accepts]: Start accepts. Automaton has 578197 states and 621869 transitions. Word has length 1279 [2021-12-06 21:03:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:42,047 INFO L470 AbstractCegarLoop]: Abstraction has 578197 states and 621869 transitions. [2021-12-06 21:03:42,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.3333333333333) internal successors, (958), 3 states have internal predecessors, (958), 0 states have call successors, (0), 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 21:03:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 578197 states and 621869 transitions. [2021-12-06 21:03:42,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1290 [2021-12-06 21:03:42,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:42,064 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 7, 7, 7, 7, 7, 7, 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, 4, 4, 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, 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] [2021-12-06 21:03:42,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 21:03:42,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:03:42,266 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:42,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:42,268 INFO L85 PathProgramCache]: Analyzing trace with hash 397447792, now seen corresponding path program 1 times [2021-12-06 21:03:42,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:03:42,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363930521] [2021-12-06 21:03:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:42,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:03:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2290 backedges. 1522 proven. 485 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-12-06 21:03:42,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:03:42,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363930521] [2021-12-06 21:03:42,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363930521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:03:42,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485894726] [2021-12-06 21:03:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:03:42,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:03:42,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:03:42,771 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:03:42,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 21:03:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:43,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:03:43,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:03:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2290 backedges. 1705 proven. 0 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2021-12-06 21:03:43,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:03:43,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485894726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:03:43,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:03:43,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-06 21:03:43,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517647432] [2021-12-06 21:03:43,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:03:43,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:03:43,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:03:43,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:03:43,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:03:43,906 INFO L87 Difference]: Start difference. First operand 578197 states and 621869 transitions. Second operand has 3 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 0 states have call successors, (0), 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 21:03:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:53,267 INFO L93 Difference]: Finished difference Result 1252036 states and 1346482 transitions. [2021-12-06 21:03:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:03:53,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 0 states have call successors, (0), 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 1289 [2021-12-06 21:03:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:54,029 INFO L225 Difference]: With dead ends: 1252036 [2021-12-06 21:03:54,029 INFO L226 Difference]: Without dead ends: 675204 [2021-12-06 21:03:54,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1294 GetRequests, 1290 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:03:54,170 INFO L933 BasicCegarLoop]: 1596 mSDtfsCounter, 1371 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 4841 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1371 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 5363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 4841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:54,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1371 Valid, 1752 Invalid, 5363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 4841 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-12-06 21:03:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675204 states. [2021-12-06 21:04:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675204 to 675113. [2021-12-06 21:04:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675113 states, 675112 states have (on average 1.0680464871013995) internal successors, (721051), 675112 states have internal predecessors, (721051), 0 states have call successors, (0), 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 21:04:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675113 states to 675113 states and 721051 transitions. [2021-12-06 21:04:01,894 INFO L78 Accepts]: Start accepts. Automaton has 675113 states and 721051 transitions. Word has length 1289 [2021-12-06 21:04:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:04:01,894 INFO L470 AbstractCegarLoop]: Abstraction has 675113 states and 721051 transitions. [2021-12-06 21:04:01,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 0 states have call successors, (0), 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 21:04:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 675113 states and 721051 transitions. [2021-12-06 21:04:01,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1354 [2021-12-06 21:04:01,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:04:01,915 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:04:01,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 21:04:02,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:04:02,118 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:04:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:04:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash 931532668, now seen corresponding path program 1 times [2021-12-06 21:04:02,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:04:02,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472707567] [2021-12-06 21:04:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:04:02,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:04:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 1198 proven. 218 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-12-06 21:04:02,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:04:02,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472707567] [2021-12-06 21:04:02,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472707567] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:04:02,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137423759] [2021-12-06 21:04:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:04:02,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:04:02,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:04:02,996 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:04:02,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 21:04:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:04:03,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:04:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 1536 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-12-06 21:04:04,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:04:04,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137423759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:04:04,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:04:04,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 21:04:04,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708780913] [2021-12-06 21:04:04,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:04:04,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:04:04,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:04:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:04:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:04:04,151 INFO L87 Difference]: Start difference. First operand 675113 states and 721051 transitions. Second operand has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 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 21:04:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:04:11,851 INFO L93 Difference]: Finished difference Result 1357046 states and 1448979 transitions. [2021-12-06 21:04:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:04:11,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 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 1353 [2021-12-06 21:04:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:04:12,831 INFO L225 Difference]: With dead ends: 1357046 [2021-12-06 21:04:12,831 INFO L226 Difference]: Without dead ends: 679202 [2021-12-06 21:04:12,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1358 GetRequests, 1352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:04:12,987 INFO L933 BasicCegarLoop]: 2342 mSDtfsCounter, 1472 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3733 mSolverCounterSat, 1272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1472 SdHoareTripleChecker+Valid, 2419 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1272 IncrementalHoareTripleChecker+Valid, 3733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:04:12,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1472 Valid, 2419 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1272 Valid, 3733 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-06 21:04:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679202 states. [2021-12-06 21:04:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679202 to 658722. [2021-12-06 21:04:19,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658722 states, 658721 states have (on average 1.057195686793043) internal successors, (696397), 658721 states have internal predecessors, (696397), 0 states have call successors, (0), 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 21:04:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658722 states to 658722 states and 696397 transitions. [2021-12-06 21:04:20,350 INFO L78 Accepts]: Start accepts. Automaton has 658722 states and 696397 transitions. Word has length 1353 [2021-12-06 21:04:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:04:20,351 INFO L470 AbstractCegarLoop]: Abstraction has 658722 states and 696397 transitions. [2021-12-06 21:04:20,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 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 21:04:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 658722 states and 696397 transitions. [2021-12-06 21:04:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1364 [2021-12-06 21:04:20,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:04:20,368 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:20,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 21:04:20,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 21:04:20,571 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:04:20,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:04:20,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2104468789, now seen corresponding path program 1 times [2021-12-06 21:04:20,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:04:20,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078360253] [2021-12-06 21:04:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:04:20,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:04:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 1173 proven. 507 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-06 21:04:21,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:04:21,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078360253] [2021-12-06 21:04:21,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078360253] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:04:21,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584193884] [2021-12-06 21:04:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:04:21,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:04:21,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:04:21,229 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:04:21,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 21:04:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:21,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1568 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:04:21,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:04:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 1292 proven. 0 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2021-12-06 21:04:22,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:04:22,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584193884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:04:22,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:04:22,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 21:04:22,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622604418] [2021-12-06 21:04:22,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:04:22,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:04:22,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:04:22,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:04:22,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:04:22,249 INFO L87 Difference]: Start difference. First operand 658722 states and 696397 transitions. Second operand has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 0 states have call successors, (0), 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 21:04:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:04:31,077 INFO L93 Difference]: Finished difference Result 1314837 states and 1389791 transitions. [2021-12-06 21:04:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:04:31,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 0 states have call successors, (0), 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 1363 [2021-12-06 21:04:31,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:04:31,893 INFO L225 Difference]: With dead ends: 1314837 [2021-12-06 21:04:31,893 INFO L226 Difference]: Without dead ends: 657482 [2021-12-06 21:04:32,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 1364 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 21:04:32,327 INFO L933 BasicCegarLoop]: 2268 mSDtfsCounter, 1495 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4905 mSolverCounterSat, 799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 5704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 799 IncrementalHoareTripleChecker+Valid, 4905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:04:32,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1495 Valid, 2378 Invalid, 5704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [799 Valid, 4905 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-06 21:04:32,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657482 states. [2021-12-06 21:04:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657482 to 654616. [2021-12-06 21:04:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654616 states, 654615 states have (on average 1.049429053718598) internal successors, (686972), 654615 states have internal predecessors, (686972), 0 states have call successors, (0), 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 21:04:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654616 states to 654616 states and 686972 transitions. [2021-12-06 21:04:39,718 INFO L78 Accepts]: Start accepts. Automaton has 654616 states and 686972 transitions. Word has length 1363 [2021-12-06 21:04:39,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:04:39,718 INFO L470 AbstractCegarLoop]: Abstraction has 654616 states and 686972 transitions. [2021-12-06 21:04:39,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 0 states have call successors, (0), 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 21:04:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 654616 states and 686972 transitions. [2021-12-06 21:04:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1364 [2021-12-06 21:04:39,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:04:39,734 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:39,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 21:04:39,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e848b74-6272-437a-989c-5fda99bc7744/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 21:04:39,936 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:04:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:04:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1660645427, now seen corresponding path program 1 times [2021-12-06 21:04:39,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:04:39,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428977308] [2021-12-06 21:04:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:04:39,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:04:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 954 proven. 0 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2021-12-06 21:04:40,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:04:40,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428977308] [2021-12-06 21:04:40,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428977308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:04:40,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:04:40,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:04:40,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487030431] [2021-12-06 21:04:40,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:04:40,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:04:40,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:04:40,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:04:40,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:04:40,390 INFO L87 Difference]: Start difference. First operand 654616 states and 686972 transitions. Second operand has 4 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 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 21:04:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:04:52,256 INFO L93 Difference]: Finished difference Result 1432092 states and 1503982 transitions. [2021-12-06 21:04:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:04:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 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 1363 [2021-12-06 21:04:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:04:53,107 INFO L225 Difference]: With dead ends: 1432092 [2021-12-06 21:04:53,107 INFO L226 Difference]: Without dead ends: 780208 [2021-12-06 21:04:53,265 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 21:04:53,266 INFO L933 BasicCegarLoop]: 780 mSDtfsCounter, 3023 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 8394 mSolverCounterSat, 2154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3023 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 10548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2154 IncrementalHoareTripleChecker+Valid, 8394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:04:53,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3023 Valid, 1115 Invalid, 10548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2154 Valid, 8394 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2021-12-06 21:04:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780208 states.