./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label34.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 89a08756b3eab9814257e3e9611de0e641c56712e4759aba21bf6c0b258f779c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:09:16,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:09:16,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:09:16,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:09:16,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:09:16,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:09:16,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:09:16,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:09:16,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:09:16,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:09:16,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:09:16,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:09:16,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:09:16,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:09:16,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:09:16,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:09:16,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:09:16,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:09:16,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:09:16,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:09:16,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:09:16,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:09:16,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:09:16,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:09:16,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:09:16,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:09:16,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:09:16,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:09:16,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:09:16,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:09:16,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:09:16,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:09:16,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:09:16,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:09:16,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:09:16,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:09:16,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:09:16,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:09:16,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:09:16,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:09:16,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:09:16,414 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:09:16,469 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:09:16,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:09:16,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:09:16,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:09:16,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:09:16,472 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:09:16,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:09:16,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:09:16,474 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:09:16,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:09:16,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:09:16,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:09:16,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:09:16,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:09:16,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:09:16,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:09:16,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:09:16,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:09:16,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:09:16,478 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:09:16,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:09:16,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:09:16,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:09:16,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:09:16,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:09:16,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:09:16,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:09:16,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:09:16,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:09:16,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:09:16,484 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:09:16,484 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:09:16,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:09:16,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:09:16,485 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_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89a08756b3eab9814257e3e9611de0e641c56712e4759aba21bf6c0b258f779c [2021-11-20 06:09:16,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:09:16,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:09:16,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:09:16,804 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:09:16,805 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:09:16,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem03_label34.c [2021-11-20 06:09:16,892 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/data/f7309d957/053e441a756c4d4a8cd526caabf53959/FLAGbd783f022 [2021-11-20 06:09:17,706 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:09:17,707 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/sv-benchmarks/c/eca-rers2012/Problem03_label34.c [2021-11-20 06:09:17,725 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/data/f7309d957/053e441a756c4d4a8cd526caabf53959/FLAGbd783f022 [2021-11-20 06:09:17,809 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/data/f7309d957/053e441a756c4d4a8cd526caabf53959 [2021-11-20 06:09:17,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:09:17,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:09:17,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:09:17,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:09:17,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:09:17,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:09:17" (1/1) ... [2021-11-20 06:09:17,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2269a7b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:17, skipping insertion in model container [2021-11-20 06:09:17,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:09:17" (1/1) ... [2021-11-20 06:09:17,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:09:17,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:09:18,758 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_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/sv-benchmarks/c/eca-rers2012/Problem03_label34.c[59879,59892] [2021-11-20 06:09:18,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:09:18,797 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:09:19,068 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_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/sv-benchmarks/c/eca-rers2012/Problem03_label34.c[59879,59892] [2021-11-20 06:09:19,080 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:09:19,102 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:09:19,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:19 WrapperNode [2021-11-20 06:09:19,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:09:19,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:09:19,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:09:19,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:09:19,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:19" (1/1) ... [2021-11-20 06:09:19,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:19" (1/1) ... [2021-11-20 06:09:19,370 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-20 06:09:19,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:09:19,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:09:19,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:09:19,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:09:19,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:19" (1/1) ... [2021-11-20 06:09:19,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:19" (1/1) ... [2021-11-20 06:09:19,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:19" (1/1) ... [2021-11-20 06:09:19,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:19" (1/1) ... [2021-11-20 06:09:19,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:19" (1/1) ... [2021-11-20 06:09:19,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:19" (1/1) ... [2021-11-20 06:09:19,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:19" (1/1) ... [2021-11-20 06:09:19,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:09:19,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:09:19,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:09:19,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:09:19,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:19" (1/1) ... [2021-11-20 06:09:19,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:09:19,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:09:19,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:09:19,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:09:19,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:09:19,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:09:19,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:09:19,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:09:19,770 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:09:19,772 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:09:21,816 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:09:21,840 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:09:21,841 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:09:21,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:09:21 BoogieIcfgContainer [2021-11-20 06:09:21,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:09:21,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:09:21,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:09:21,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:09:21,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:09:17" (1/3) ... [2021-11-20 06:09:21,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178099f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:09:21, skipping insertion in model container [2021-11-20 06:09:21,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:19" (2/3) ... [2021-11-20 06:09:21,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178099f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:09:21, skipping insertion in model container [2021-11-20 06:09:21,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:09:21" (3/3) ... [2021-11-20 06:09:21,859 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label34.c [2021-11-20 06:09:21,866 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:09:21,866 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:09:21,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:09:21,965 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:09:21,966 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:09:22,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 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) [2021-11-20 06:09:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-20 06:09:22,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:22,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:22,056 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:22,063 INFO L85 PathProgramCache]: Analyzing trace with hash -502159206, now seen corresponding path program 1 times [2021-11-20 06:09:22,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:22,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188236189] [2021-11-20 06:09:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:22,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:22,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:22,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188236189] [2021-11-20 06:09:22,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188236189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:22,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:22,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:09:22,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876055411] [2021-11-20 06:09:22,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:22,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:22,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:22,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:22,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:22,918 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 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) Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:24,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:24,461 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2021-11-20 06:09:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:24,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2021-11-20 06:09:24,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:24,497 INFO L225 Difference]: With dead ends: 857 [2021-11-20 06:09:24,498 INFO L226 Difference]: Without dead ends: 462 [2021-11-20 06:09:24,507 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 [2021-11-20 06:09:24,513 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 98 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:24,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 187 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:09:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-20 06:09:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2021-11-20 06:09:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2021-11-20 06:09:24,644 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 190 [2021-11-20 06:09:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:24,648 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2021-11-20 06:09:24,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2021-11-20 06:09:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-20 06:09:24,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:24,659 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:09:24,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:09:24,660 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:24,664 INFO L85 PathProgramCache]: Analyzing trace with hash 604561913, now seen corresponding path program 1 times [2021-11-20 06:09:24,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:24,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580214923] [2021-11-20 06:09:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:24,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:24,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:24,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580214923] [2021-11-20 06:09:24,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580214923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:24,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:24,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:09:24,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451387281] [2021-11-20 06:09:24,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:24,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:24,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:24,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:24,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:24,849 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:26,057 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2021-11-20 06:09:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:26,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 198 [2021-11-20 06:09:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:26,069 INFO L225 Difference]: With dead ends: 1344 [2021-11-20 06:09:26,069 INFO L226 Difference]: Without dead ends: 886 [2021-11-20 06:09:26,073 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 [2021-11-20 06:09:26,076 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:26,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:09:26,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-11-20 06:09:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2021-11-20 06:09:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5120828538550057) internal successors, (1314), 869 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1314 transitions. [2021-11-20 06:09:26,115 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1314 transitions. Word has length 198 [2021-11-20 06:09:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:26,116 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1314 transitions. [2021-11-20 06:09:26,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1314 transitions. [2021-11-20 06:09:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-20 06:09:26,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:26,123 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2021-11-20 06:09:26,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:09:26,124 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:26,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:26,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1989171232, now seen corresponding path program 1 times [2021-11-20 06:09:26,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:26,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086657779] [2021-11-20 06:09:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:26,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:09:26,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086657779] [2021-11-20 06:09:26,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086657779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:26,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:26,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:09:26,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199313617] [2021-11-20 06:09:26,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:26,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:26,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:26,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:26,288 INFO L87 Difference]: Start difference. First operand 870 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:27,431 INFO L93 Difference]: Finished difference Result 2554 states and 3869 transitions. [2021-11-20 06:09:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:27,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 210 [2021-11-20 06:09:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:27,444 INFO L225 Difference]: With dead ends: 2554 [2021-11-20 06:09:27,444 INFO L226 Difference]: Without dead ends: 1686 [2021-11-20 06:09:27,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:27,449 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 232 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:27,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 417 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:09:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-11-20 06:09:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1684. [2021-11-20 06:09:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.3363042186571599) internal successors, (2249), 1683 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:27,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2249 transitions. [2021-11-20 06:09:27,507 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2249 transitions. Word has length 210 [2021-11-20 06:09:27,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:27,507 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 2249 transitions. [2021-11-20 06:09:27,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2249 transitions. [2021-11-20 06:09:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-20 06:09:27,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:27,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:27,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:09:27,517 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:27,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:27,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1472580547, now seen corresponding path program 1 times [2021-11-20 06:09:27,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:27,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524015649] [2021-11-20 06:09:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:27,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:27,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:27,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524015649] [2021-11-20 06:09:27,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524015649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:27,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:27,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:09:27,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228529536] [2021-11-20 06:09:27,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:27,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:27,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:27,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:27,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:27,657 INFO L87 Difference]: Start difference. First operand 1684 states and 2249 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:28,715 INFO L93 Difference]: Finished difference Result 5017 states and 6707 transitions. [2021-11-20 06:09:28,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:28,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 213 [2021-11-20 06:09:28,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:28,738 INFO L225 Difference]: With dead ends: 5017 [2021-11-20 06:09:28,738 INFO L226 Difference]: Without dead ends: 3335 [2021-11-20 06:09:28,741 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 [2021-11-20 06:09:28,743 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:28,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 123 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:09:28,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2021-11-20 06:09:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3326. [2021-11-20 06:09:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.3230075187969925) internal successors, (4399), 3325 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 4399 transitions. [2021-11-20 06:09:28,854 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 4399 transitions. Word has length 213 [2021-11-20 06:09:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:28,854 INFO L470 AbstractCegarLoop]: Abstraction has 3326 states and 4399 transitions. [2021-11-20 06:09:28,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 4399 transitions. [2021-11-20 06:09:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-20 06:09:28,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:28,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:28,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:09:28,867 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:28,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:28,868 INFO L85 PathProgramCache]: Analyzing trace with hash -909021787, now seen corresponding path program 1 times [2021-11-20 06:09:28,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:28,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643040239] [2021-11-20 06:09:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:28,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:28,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:28,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643040239] [2021-11-20 06:09:28,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643040239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:28,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:28,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:09:28,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031333011] [2021-11-20 06:09:28,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:28,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:28,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:28,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:28,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:28,974 INFO L87 Difference]: Start difference. First operand 3326 states and 4399 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:30,072 INFO L93 Difference]: Finished difference Result 9928 states and 13145 transitions. [2021-11-20 06:09:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-11-20 06:09:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:30,117 INFO L225 Difference]: With dead ends: 9928 [2021-11-20 06:09:30,117 INFO L226 Difference]: Without dead ends: 6604 [2021-11-20 06:09:30,123 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 [2021-11-20 06:09:30,128 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 219 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:30,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 167 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:09:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2021-11-20 06:09:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 5768. [2021-11-20 06:09:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5768 states, 5767 states have (on average 1.3370903415987516) internal successors, (7711), 5767 states have internal predecessors, (7711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5768 states to 5768 states and 7711 transitions. [2021-11-20 06:09:30,363 INFO L78 Accepts]: Start accepts. Automaton has 5768 states and 7711 transitions. Word has length 216 [2021-11-20 06:09:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:30,365 INFO L470 AbstractCegarLoop]: Abstraction has 5768 states and 7711 transitions. [2021-11-20 06:09:30,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 5768 states and 7711 transitions. [2021-11-20 06:09:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-20 06:09:30,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:30,387 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2021-11-20 06:09:30,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:09:30,390 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:30,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash -455322744, now seen corresponding path program 1 times [2021-11-20 06:09:30,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:30,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539738700] [2021-11-20 06:09:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:30,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:09:30,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:30,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539738700] [2021-11-20 06:09:30,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539738700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:30,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:30,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:09:30,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871975518] [2021-11-20 06:09:30,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:30,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:30,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:30,603 INFO L87 Difference]: Start difference. First operand 5768 states and 7711 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:31,857 INFO L93 Difference]: Finished difference Result 14591 states and 19420 transitions. [2021-11-20 06:09:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:31,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 225 [2021-11-20 06:09:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:31,915 INFO L225 Difference]: With dead ends: 14591 [2021-11-20 06:09:31,916 INFO L226 Difference]: Without dead ends: 8825 [2021-11-20 06:09:31,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:31,928 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 202 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:31,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 421 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:09:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2021-11-20 06:09:32,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 8821. [2021-11-20 06:09:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8821 states, 8820 states have (on average 1.2786848072562358) internal successors, (11278), 8820 states have internal predecessors, (11278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 11278 transitions. [2021-11-20 06:09:32,287 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 11278 transitions. Word has length 225 [2021-11-20 06:09:32,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:32,287 INFO L470 AbstractCegarLoop]: Abstraction has 8821 states and 11278 transitions. [2021-11-20 06:09:32,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 11278 transitions. [2021-11-20 06:09:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-20 06:09:32,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:32,311 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:32,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:09:32,311 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:32,312 INFO L85 PathProgramCache]: Analyzing trace with hash -434828922, now seen corresponding path program 1 times [2021-11-20 06:09:32,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:32,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156606075] [2021-11-20 06:09:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:32,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:32,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:32,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156606075] [2021-11-20 06:09:32,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156606075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:09:32,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88103743] [2021-11-20 06:09:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:32,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:09:32,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:09:32,504 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:09:32,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:09:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:32,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:09:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 06:09:33,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:09:33,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88103743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:33,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:09:33,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-20 06:09:33,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342020746] [2021-11-20 06:09:33,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:33,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:33,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:33,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:33,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:33,670 INFO L87 Difference]: Start difference. First operand 8821 states and 11278 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:34,876 INFO L93 Difference]: Finished difference Result 22147 states and 28843 transitions. [2021-11-20 06:09:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:34,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 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 227 [2021-11-20 06:09:34,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:35,028 INFO L225 Difference]: With dead ends: 22147 [2021-11-20 06:09:35,028 INFO L226 Difference]: Without dead ends: 13328 [2021-11-20 06:09:35,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:35,059 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 79 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:35,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 134 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:09:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13328 states. [2021-11-20 06:09:35,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13328 to 13316. [2021-11-20 06:09:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13316 states, 13315 states have (on average 1.282838903492302) internal successors, (17081), 13315 states have internal predecessors, (17081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13316 states to 13316 states and 17081 transitions. [2021-11-20 06:09:35,552 INFO L78 Accepts]: Start accepts. Automaton has 13316 states and 17081 transitions. Word has length 227 [2021-11-20 06:09:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:35,553 INFO L470 AbstractCegarLoop]: Abstraction has 13316 states and 17081 transitions. [2021-11-20 06:09:35,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:35,555 INFO L276 IsEmpty]: Start isEmpty. Operand 13316 states and 17081 transitions. [2021-11-20 06:09:35,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-20 06:09:35,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:35,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:35,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:35,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:09:35,799 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:35,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:35,800 INFO L85 PathProgramCache]: Analyzing trace with hash -903632663, now seen corresponding path program 1 times [2021-11-20 06:09:35,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:35,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456617828] [2021-11-20 06:09:35,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:35,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:35,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:35,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456617828] [2021-11-20 06:09:35,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456617828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:35,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:35,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:09:35,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303543188] [2021-11-20 06:09:35,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:35,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:35,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:35,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:35,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:35,949 INFO L87 Difference]: Start difference. First operand 13316 states and 17081 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:37,286 INFO L93 Difference]: Finished difference Result 31753 states and 40754 transitions. [2021-11-20 06:09:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:37,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 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 231 [2021-11-20 06:09:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:37,344 INFO L225 Difference]: With dead ends: 31753 [2021-11-20 06:09:37,344 INFO L226 Difference]: Without dead ends: 18439 [2021-11-20 06:09:37,362 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 [2021-11-20 06:09:37,363 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 197 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:37,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 175 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:09:37,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18439 states. [2021-11-20 06:09:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18439 to 18421. [2021-11-20 06:09:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18421 states, 18420 states have (on average 1.2747557003257328) internal successors, (23481), 18420 states have internal predecessors, (23481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:37,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18421 states to 18421 states and 23481 transitions. [2021-11-20 06:09:37,911 INFO L78 Accepts]: Start accepts. Automaton has 18421 states and 23481 transitions. Word has length 231 [2021-11-20 06:09:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:37,912 INFO L470 AbstractCegarLoop]: Abstraction has 18421 states and 23481 transitions. [2021-11-20 06:09:37,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:37,912 INFO L276 IsEmpty]: Start isEmpty. Operand 18421 states and 23481 transitions. [2021-11-20 06:09:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-20 06:09:37,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:37,957 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:37,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:09:37,957 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:37,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:37,958 INFO L85 PathProgramCache]: Analyzing trace with hash 202592222, now seen corresponding path program 1 times [2021-11-20 06:09:37,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:37,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119721761] [2021-11-20 06:09:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:37,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:38,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:38,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119721761] [2021-11-20 06:09:38,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119721761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:09:38,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356822321] [2021-11-20 06:09:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:38,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:09:38,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:09:38,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:09:38,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:09:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:38,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:09:38,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:39,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:09:39,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356822321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:39,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:09:39,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 06:09:39,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652999100] [2021-11-20 06:09:39,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:39,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:39,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:39,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:39,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:39,289 INFO L87 Difference]: Start difference. First operand 18421 states and 23481 transitions. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:41,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:41,210 INFO L93 Difference]: Finished difference Result 51669 states and 67367 transitions. [2021-11-20 06:09:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:41,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 238 [2021-11-20 06:09:41,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:41,288 INFO L225 Difference]: With dead ends: 51669 [2021-11-20 06:09:41,289 INFO L226 Difference]: Without dead ends: 33250 [2021-11-20 06:09:41,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:41,322 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 617 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:41,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 185 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 06:09:41,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33250 states. [2021-11-20 06:09:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33250 to 33240. [2021-11-20 06:09:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33240 states, 33239 states have (on average 1.203375552814465) internal successors, (39999), 33239 states have internal predecessors, (39999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33240 states to 33240 states and 39999 transitions. [2021-11-20 06:09:42,214 INFO L78 Accepts]: Start accepts. Automaton has 33240 states and 39999 transitions. Word has length 238 [2021-11-20 06:09:42,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:42,214 INFO L470 AbstractCegarLoop]: Abstraction has 33240 states and 39999 transitions. [2021-11-20 06:09:42,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 33240 states and 39999 transitions. [2021-11-20 06:09:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-20 06:09:42,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:42,275 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:09:42,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:42,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 06:09:42,503 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:42,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1507272799, now seen corresponding path program 1 times [2021-11-20 06:09:42,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:42,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870633851] [2021-11-20 06:09:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:42,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:09:42,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:42,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870633851] [2021-11-20 06:09:42,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870633851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:42,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:42,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:09:42,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811192726] [2021-11-20 06:09:42,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:42,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:42,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:42,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:42,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:42,654 INFO L87 Difference]: Start difference. First operand 33240 states and 39999 transitions. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:44,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:44,510 INFO L93 Difference]: Finished difference Result 79005 states and 95628 transitions. [2021-11-20 06:09:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:44,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 246 [2021-11-20 06:09:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:44,600 INFO L225 Difference]: With dead ends: 79005 [2021-11-20 06:09:44,600 INFO L226 Difference]: Without dead ends: 45970 [2021-11-20 06:09:44,624 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 [2021-11-20 06:09:44,625 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 460 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:44,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 55 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:09:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45970 states. [2021-11-20 06:09:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45970 to 43331. [2021-11-20 06:09:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43331 states, 43330 states have (on average 1.1515116547426725) internal successors, (49895), 43330 states have internal predecessors, (49895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:45,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43331 states to 43331 states and 49895 transitions. [2021-11-20 06:09:45,623 INFO L78 Accepts]: Start accepts. Automaton has 43331 states and 49895 transitions. Word has length 246 [2021-11-20 06:09:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:45,623 INFO L470 AbstractCegarLoop]: Abstraction has 43331 states and 49895 transitions. [2021-11-20 06:09:45,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 43331 states and 49895 transitions. [2021-11-20 06:09:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-20 06:09:45,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:45,661 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:45,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:09:45,661 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:45,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:45,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1080587592, now seen corresponding path program 1 times [2021-11-20 06:09:45,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:45,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480356837] [2021-11-20 06:09:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:45,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:09:45,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:45,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480356837] [2021-11-20 06:09:45,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480356837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:45,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:45,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:09:45,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593120225] [2021-11-20 06:09:45,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:45,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:45,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:45,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:45,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:45,765 INFO L87 Difference]: Start difference. First operand 43331 states and 49895 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:47,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:47,351 INFO L93 Difference]: Finished difference Result 96841 states and 111915 transitions. [2021-11-20 06:09:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:47,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 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 261 [2021-11-20 06:09:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:47,448 INFO L225 Difference]: With dead ends: 96841 [2021-11-20 06:09:47,449 INFO L226 Difference]: Without dead ends: 53715 [2021-11-20 06:09:47,471 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 [2021-11-20 06:09:47,472 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 202 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:47,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 145 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:09:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53715 states. [2021-11-20 06:09:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53715 to 53500. [2021-11-20 06:09:48,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53500 states, 53499 states have (on average 1.1574421951812184) internal successors, (61922), 53499 states have internal predecessors, (61922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53500 states to 53500 states and 61922 transitions. [2021-11-20 06:09:48,810 INFO L78 Accepts]: Start accepts. Automaton has 53500 states and 61922 transitions. Word has length 261 [2021-11-20 06:09:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:48,811 INFO L470 AbstractCegarLoop]: Abstraction has 53500 states and 61922 transitions. [2021-11-20 06:09:48,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:48,812 INFO L276 IsEmpty]: Start isEmpty. Operand 53500 states and 61922 transitions. [2021-11-20 06:09:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-20 06:09:48,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:48,898 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:48,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:09:48,899 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash -833244104, now seen corresponding path program 1 times [2021-11-20 06:09:48,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:48,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943932964] [2021-11-20 06:09:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:48,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:09:49,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943932964] [2021-11-20 06:09:49,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943932964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:09:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485210522] [2021-11-20 06:09:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:49,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:09:49,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:09:49,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:09:49,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:09:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:49,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:09:49,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:09:50,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:09:50,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485210522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:50,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:09:50,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 06:09:50,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403034265] [2021-11-20 06:09:50,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:50,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:50,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:50,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:50,032 INFO L87 Difference]: Start difference. First operand 53500 states and 61922 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:52,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:52,058 INFO L93 Difference]: Finished difference Result 153142 states and 177553 transitions. [2021-11-20 06:09:52,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:52,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 266 [2021-11-20 06:09:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:52,232 INFO L225 Difference]: With dead ends: 153142 [2021-11-20 06:09:52,233 INFO L226 Difference]: Without dead ends: 100254 [2021-11-20 06:09:52,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:52,263 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 746 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:52,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 309 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:09:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100254 states. [2021-11-20 06:09:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100254 to 85416. [2021-11-20 06:09:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85416 states, 85415 states have (on average 1.1460048000936605) internal successors, (97886), 85415 states have internal predecessors, (97886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85416 states to 85416 states and 97886 transitions. [2021-11-20 06:09:53,979 INFO L78 Accepts]: Start accepts. Automaton has 85416 states and 97886 transitions. Word has length 266 [2021-11-20 06:09:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:53,979 INFO L470 AbstractCegarLoop]: Abstraction has 85416 states and 97886 transitions. [2021-11-20 06:09:53,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 85416 states and 97886 transitions. [2021-11-20 06:09:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-20 06:09:54,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:54,012 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:54,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:54,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:09:54,239 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1283456450, now seen corresponding path program 1 times [2021-11-20 06:09:54,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:54,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409611232] [2021-11-20 06:09:54,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:54,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 06:09:54,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:54,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409611232] [2021-11-20 06:09:54,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409611232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:54,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:54,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:09:54,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54837179] [2021-11-20 06:09:54,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:54,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:54,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:54,407 INFO L87 Difference]: Start difference. First operand 85416 states and 97886 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:56,622 INFO L93 Difference]: Finished difference Result 230628 states and 264177 transitions. [2021-11-20 06:09:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:56,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 276 [2021-11-20 06:09:56,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:57,274 INFO L225 Difference]: With dead ends: 230628 [2021-11-20 06:09:57,274 INFO L226 Difference]: Without dead ends: 145824 [2021-11-20 06:09:57,346 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 [2021-11-20 06:09:57,347 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 556 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:57,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 460 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:09:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145824 states. [2021-11-20 06:09:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145824 to 143379. [2021-11-20 06:09:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143379 states, 143378 states have (on average 1.1419813360487663) internal successors, (163735), 143378 states have internal predecessors, (163735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143379 states to 143379 states and 163735 transitions. [2021-11-20 06:09:59,753 INFO L78 Accepts]: Start accepts. Automaton has 143379 states and 163735 transitions. Word has length 276 [2021-11-20 06:09:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:59,753 INFO L470 AbstractCegarLoop]: Abstraction has 143379 states and 163735 transitions. [2021-11-20 06:09:59,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 143379 states and 163735 transitions. [2021-11-20 06:09:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-20 06:09:59,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:59,803 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-20 06:09:59,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:09:59,804 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:59,805 INFO L85 PathProgramCache]: Analyzing trace with hash 99903459, now seen corresponding path program 1 times [2021-11-20 06:09:59,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:59,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661082065] [2021-11-20 06:09:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:59,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:10:00,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:00,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661082065] [2021-11-20 06:10:00,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661082065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:00,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:00,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:00,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213631832] [2021-11-20 06:10:00,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:00,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:00,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:00,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:00,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:00,013 INFO L87 Difference]: Start difference. First operand 143379 states and 163735 transitions. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:02,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:02,564 INFO L93 Difference]: Finished difference Result 296321 states and 338265 transitions. [2021-11-20 06:10:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:02,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 301 [2021-11-20 06:10:02,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:03,429 INFO L225 Difference]: With dead ends: 296321 [2021-11-20 06:10:03,429 INFO L226 Difference]: Without dead ends: 153554 [2021-11-20 06:10:03,491 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 [2021-11-20 06:10:03,494 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 409 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:03,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 167 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:10:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153554 states. [2021-11-20 06:10:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153554 to 152727. [2021-11-20 06:10:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152727 states, 152726 states have (on average 1.1388368712596415) internal successors, (173930), 152726 states have internal predecessors, (173930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152727 states to 152727 states and 173930 transitions. [2021-11-20 06:10:06,252 INFO L78 Accepts]: Start accepts. Automaton has 152727 states and 173930 transitions. Word has length 301 [2021-11-20 06:10:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:06,253 INFO L470 AbstractCegarLoop]: Abstraction has 152727 states and 173930 transitions. [2021-11-20 06:10:06,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 152727 states and 173930 transitions. [2021-11-20 06:10:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-20 06:10:06,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:06,298 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:10:06,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:10:06,298 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:06,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:06,299 INFO L85 PathProgramCache]: Analyzing trace with hash -985167971, now seen corresponding path program 1 times [2021-11-20 06:10:06,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:06,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375461310] [2021-11-20 06:10:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:06,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:10:06,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:06,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375461310] [2021-11-20 06:10:06,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375461310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:06,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:06,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:06,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646097416] [2021-11-20 06:10:06,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:06,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:06,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:06,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:06,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:06,489 INFO L87 Difference]: Start difference. First operand 152727 states and 173930 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:08,970 INFO L93 Difference]: Finished difference Result 310750 states and 355129 transitions. [2021-11-20 06:10:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:08,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 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 305 [2021-11-20 06:10:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:09,179 INFO L225 Difference]: With dead ends: 310750 [2021-11-20 06:10:09,179 INFO L226 Difference]: Without dead ends: 159449 [2021-11-20 06:10:09,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:09,237 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 173 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:09,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 375 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:10:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159449 states. [2021-11-20 06:10:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159449 to 155389. [2021-11-20 06:10:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155389 states, 155388 states have (on average 1.1273843540041701) internal successors, (175182), 155388 states have internal predecessors, (175182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155389 states to 155389 states and 175182 transitions. [2021-11-20 06:10:12,223 INFO L78 Accepts]: Start accepts. Automaton has 155389 states and 175182 transitions. Word has length 305 [2021-11-20 06:10:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:12,223 INFO L470 AbstractCegarLoop]: Abstraction has 155389 states and 175182 transitions. [2021-11-20 06:10:12,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:12,223 INFO L276 IsEmpty]: Start isEmpty. Operand 155389 states and 175182 transitions. [2021-11-20 06:10:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-20 06:10:12,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:12,242 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:12,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:10:12,243 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:12,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:12,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1142524655, now seen corresponding path program 1 times [2021-11-20 06:10:12,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:12,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289173157] [2021-11-20 06:10:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:12,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 06:10:12,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:12,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289173157] [2021-11-20 06:10:12,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289173157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:12,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:12,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:10:12,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302905867] [2021-11-20 06:10:12,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:12,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:12,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:12,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:12,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:12,373 INFO L87 Difference]: Start difference. First operand 155389 states and 175182 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:14,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:14,910 INFO L93 Difference]: Finished difference Result 324196 states and 364774 transitions. [2021-11-20 06:10:14,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:14,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 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 328 [2021-11-20 06:10:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:15,157 INFO L225 Difference]: With dead ends: 324196 [2021-11-20 06:10:15,157 INFO L226 Difference]: Without dead ends: 170436 [2021-11-20 06:10:15,235 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 [2021-11-20 06:10:15,249 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 203 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:15,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 157 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:10:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170436 states. [2021-11-20 06:10:17,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170436 to 168810. [2021-11-20 06:10:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168810 states, 168809 states have (on average 1.12329318934417) internal successors, (189622), 168809 states have internal predecessors, (189622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168810 states to 168810 states and 189622 transitions. [2021-11-20 06:10:18,162 INFO L78 Accepts]: Start accepts. Automaton has 168810 states and 189622 transitions. Word has length 328 [2021-11-20 06:10:18,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:18,162 INFO L470 AbstractCegarLoop]: Abstraction has 168810 states and 189622 transitions. [2021-11-20 06:10:18,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 168810 states and 189622 transitions. [2021-11-20 06:10:18,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-20 06:10:18,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:18,188 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:18,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:10:18,188 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:18,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1536803488, now seen corresponding path program 1 times [2021-11-20 06:10:18,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:18,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131139081] [2021-11-20 06:10:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:18,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-20 06:10:18,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:18,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131139081] [2021-11-20 06:10:18,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131139081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:18,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:18,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:18,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743760009] [2021-11-20 06:10:18,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:18,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:18,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:18,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:18,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:18,331 INFO L87 Difference]: Start difference. First operand 168810 states and 189622 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:20,522 INFO L93 Difference]: Finished difference Result 327082 states and 367575 transitions. [2021-11-20 06:10:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:20,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 330 [2021-11-20 06:10:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:20,723 INFO L225 Difference]: With dead ends: 327082 [2021-11-20 06:10:20,723 INFO L226 Difference]: Without dead ends: 160717 [2021-11-20 06:10:20,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:20,786 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 167 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:20,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 347 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:10:20,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160717 states. [2021-11-20 06:10:23,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160717 to 139758. [2021-11-20 06:10:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139758 states, 139757 states have (on average 1.1236503359402392) internal successors, (157038), 139757 states have internal predecessors, (157038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139758 states to 139758 states and 157038 transitions. [2021-11-20 06:10:23,817 INFO L78 Accepts]: Start accepts. Automaton has 139758 states and 157038 transitions. Word has length 330 [2021-11-20 06:10:23,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:23,818 INFO L470 AbstractCegarLoop]: Abstraction has 139758 states and 157038 transitions. [2021-11-20 06:10:23,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:23,818 INFO L276 IsEmpty]: Start isEmpty. Operand 139758 states and 157038 transitions. [2021-11-20 06:10:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-11-20 06:10:23,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:23,837 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:10:23,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:10:23,837 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:23,838 INFO L85 PathProgramCache]: Analyzing trace with hash 986990376, now seen corresponding path program 1 times [2021-11-20 06:10:23,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:23,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322231874] [2021-11-20 06:10:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:23,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-20 06:10:23,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:23,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322231874] [2021-11-20 06:10:23,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322231874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:23,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:23,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:23,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61209041] [2021-11-20 06:10:23,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:23,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:23,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:23,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:23,936 INFO L87 Difference]: Start difference. First operand 139758 states and 157038 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:25,739 INFO L93 Difference]: Finished difference Result 250833 states and 280509 transitions. [2021-11-20 06:10:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:25,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 337 [2021-11-20 06:10:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:25,906 INFO L225 Difference]: With dead ends: 250833 [2021-11-20 06:10:25,906 INFO L226 Difference]: Without dead ends: 110877 [2021-11-20 06:10:25,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:25,973 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 223 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:25,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 310 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:10:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110877 states. [2021-11-20 06:10:27,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110877 to 90561. [2021-11-20 06:10:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90561 states, 90560 states have (on average 1.0718308303886925) internal successors, (97065), 90560 states have internal predecessors, (97065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90561 states to 90561 states and 97065 transitions. [2021-11-20 06:10:27,519 INFO L78 Accepts]: Start accepts. Automaton has 90561 states and 97065 transitions. Word has length 337 [2021-11-20 06:10:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:27,519 INFO L470 AbstractCegarLoop]: Abstraction has 90561 states and 97065 transitions. [2021-11-20 06:10:27,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 90561 states and 97065 transitions. [2021-11-20 06:10:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-20 06:10:27,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:27,533 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:10:27,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:10:27,533 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:27,534 INFO L85 PathProgramCache]: Analyzing trace with hash 334417663, now seen corresponding path program 1 times [2021-11-20 06:10:27,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:27,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084138391] [2021-11-20 06:10:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:27,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 159 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:10:27,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:27,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084138391] [2021-11-20 06:10:27,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084138391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:10:27,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716687055] [2021-11-20 06:10:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:27,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:27,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:27,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_826f6ac2-8c58-4fea-8c23-aa9c0f57a6ee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:10:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:27,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:10:27,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:10:28,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:10:28,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716687055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:28,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:10:28,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 06:10:28,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019411334] [2021-11-20 06:10:28,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:28,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:28,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:28,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:10:28,524 INFO L87 Difference]: Start difference. First operand 90561 states and 97065 transitions. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:29,869 INFO L93 Difference]: Finished difference Result 189690 states and 203346 transitions. [2021-11-20 06:10:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 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 339 [2021-11-20 06:10:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted.